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图片绘制成功 排查为何之前不行

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sunmeng 2025-07-23 18:03:47 +08:00
parent 94e79c4b77
commit f25c008fb5
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2
pages.json
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@ -1,7 +1,7 @@
{
"pages": [ //pages数组中第一项表示应用启动页，参考：https://uniapp.dcloud.io/collocation/pages
{
"path" : "pages/index/gesture-canvas-page",
"path" : "pages/index/index",
"style" :
{
"navigationBarTitleText" : ""

299
pages/index/gesture-canvas-page.vue
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<template>
<view class="container">
<view class="gesture-container"
@touchstart="handleTouchEvent"
@touchmove="handleTouchEvent"
@touchend="handleTouchEvent"
@touchcancel="handleTouchEvent">
<!-- 显示调试信息 -->
<view class="debug-info">
<text>缩放: {{scaleValue.toFixed(2)}} | X: {{transformMatrix.tx.toFixed(1)}} | Y: {{transformMatrix.ty.toFixed(1)}}</text>
<text>手势: {{gestureStatus}}</text>
<text>触点: {{touchPoints}}</text>
</view>
<transform-canvas
ref="canvasRef"
:width="canvasWidth"
:height="canvasHeight"
:matrix="transformMatrix"
/>
</view>
<view class="controls">
<button @click="resetCanvas">重置</button>
<button @click="zoomIn">放大</button>
<button @click="zoomOut">缩小</button>
</view>
</view>
</template>
<script>
import TransformMatrix from './transform-matrix.js'
import GestureHandler from './gesture-handler.js'
import TransformCanvas from './transform-canvas.vue'
export default {
components: {
TransformCanvas
},
data() {
return {
canvasWidth: 300,
canvasHeight: 300,
transformMatrix: new TransformMatrix(),
gestureHandler: null,
containerRect: null,
gestureStatus: '等待手势...',
scaleValue: 1,
touchPoints: 0,
lastGestureTime: 0
};
},
async mounted() {
await this.getContainerPosition();
// 2. 初始化手势处理器（传入容器位置信息）
this.initGestureHandler();
// 3. 初始绘制
this.$nextTick(() => {
this.updateCanvas();
});
},
methods: {
// 独立的手势初始化方法
initGestureHandler() {
try {
this.gestureHandler = new GestureHandler(this, this.transformMatrix, {
container: this.containerRect
});
} catch (e) {
console.error('手势处理器初始化失败:', e);
// 简化降级方案
this.gestureHandler = {
catchEvent: (event) => {
// 只处理最基本的行为
if (event.touches.length > 0) {
const firstTouch = event.touches[0];
const x = firstTouch.clientX - this.containerRect.left;
const y = firstTouch.clientY - this.containerRect.top;
// 仅更新调试信息显示
this.gestureStatus = "降级模式: 单指拖动";
this.touchPoints = event.touches.length;
// 简单变换
if (event.type === 'touchmove') {
this.transformMatrix.tx = x;
this.transformMatrix.ty = y;
this.updateCanvas();
}
}
}
}
}
},
async getContainerPosition() {
// 添加重试机制
let retryCount = 0;
const maxRetries = 3;
while (retryCount < maxRetries) {
try {
const rect = await new Promise(resolve => {
const query = uni.createSelectorQuery().in(this);
query.select('.gesture-container').boundingClientRect(res => {
resolve(res);
}).exec();
});
if (rect) {
this.containerRect = {
left: rect.left,
top: rect.top,
width: rect.width,
height: rect.height
};
console.log('成功获取容器位置:', this.containerRect);
return; // 成功获取则退出
}
} catch (e) {
console.error('获取容器位置失败:', e);
}
// 等待后重试
await new Promise(r => setTimeout(r, 100));
retryCount++;
}
console.error(`容器位置获取失败，已重试${maxRetries}次`);
},
// 事件处理
async handleTouchEvent(event) {
if (!this.gestureHandler || !this.containerRect) {
console.warn('手势处理器未就绪，尝试重新初始化...');
await this.getContainerPosition();
this.initGestureHandler();
if (event.type === 'touchend' || event.type === 'touchcancel') {
this.lastPoint = null;
this.lastPoints = null;
this.gestureStatus = '结束';
// 更新一次画面
this.updateCanvas();
return;
}
// 重新处理当前事件
if (this.gestureHandler) {
return this.handleTouchEvent(event);
}
// 如果是简单处理器，使用下面优化的基础处理方法
if (!this.at) {
// 使用优化后的基础处理方法
if (correctedEvent.touches.length === 1) {
this.handlePan(correctedEvent.touches[0]);
} else if (correctedEvent.touches.length > 1) {
this.handlePinch(correctedEvent.touches);
}
}
return;
}
// 记录时间戳
const currentTime = Date.now();
// 更新触点数量
this.touchPoints = event.touches.length;
// 修正坐标（核心修复点）
const correctedTouches = Array.from(event.touches).map(touch => {
const x = touch.clientX - this.containerRect.left;
const y = touch.clientY - this.containerRect.top;
console.log(`原始坐标: (${touch.clientX}, ${touch.clientY}) 修正后: (${x}, ${y})`);
return {
...touch,
x: x,
y: y
};
});
// 创建修正后的事件对象
const correctedEvent = {
...event,
touches: correctedTouches,
changedTouches: correctedTouches
};
// 传递事件给手势处理器
this.gestureHandler.catchEvent(correctedEvent);
// 更新手势状态
if (event.type === 'touchstart') {
this.gestureStatus = event.touches.length > 1 ? '双指开始' : '单指开始';
}
else if (event.type === 'touchmove') {
this.gestureStatus = event.touches.length > 1 ? '双指缩放/移动' : '单指移动';
}
else {
this.gestureStatus = '结束';
}
// 限制更新频率：至少每50ms更新一次
if (currentTime - this.lastGestureTime > 50) {
this.lastGestureTime = currentTime;
this.updateCanvas();
}
},
// 更新Canvas（性能优化版）
updateCanvas() {
this.$nextTick(() => {
const canvas = this.$refs.canvasRef;
if (canvas) {
canvas.draw();
// 计算当前缩放值
this.scaleValue = Math.sqrt(
this.transformMatrix.a * this.transformMatrix.a +
this.transformMatrix.b * this.transformMatrix.b
);
}
});
},
// 重置画布
resetCanvas() {
this.transformMatrix.reset();
this.scaleValue = 1;
this.gestureStatus = "画布已重置";
this.updateCanvas();
},
// 放大
zoomIn() {
this.transformMatrix.scale(1.2, 1.2, this.canvasWidth/2, this.canvasHeight/2);
this.updateCanvas();
},
// 缩小
zoomOut() {
this.transformMatrix.scale(0.8, 0.8, this.canvasWidth/2, this.canvasHeight/2);
this.updateCanvas();
},
}
};
</script>
<style scoped>
.container {
padding: 20px;
}
.gesture-container {
position: relative;
width: 300px;
height: 300px;
border: 1px solid #ccc;
margin: 0 auto;
}
.debug-info {
position: absolute;
bottom: 0;
left: 0;
right: 0;
background: rgba(0,0,0,0.6);
color: white;
padding: 5px;
font-size: 12px;
z-index: 10;
display: flex;
flex-direction: column;
}
.controls {
margin-top: 20px;
display: flex;
justify-content: center;
gap: 10px;
}
button {
padding: 8px 16px;
background: #4a8cff;
color: white;
border: none;
border-radius: 4px;
}
</style>

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pages/index/gesture-handler.js
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import AnyTouch from 'any-touch'
class GestureHandler {
constructor(context, transformMatrix, { container }) {
this.transformMatrix = transformMatrix;
this.containerRect = container;
this.panThreshold = 5; // 移动5像素以上才认为是拖动
this.panStarted = false;
// 小程序环境兼容处理
const atOptions = {
getPoint: touch => ({
x: touch.clientX - this.containerRect.left,
y: touch.clientY - this.containerRect.top
}),
preventDefault: false
};
// 小程序特化处理 - 跳过DOM相关操作
if (typeof window === 'undefined' || typeof HTMLElement === 'undefined') {
// 小程序环境下不需要设置DOM属性
atOptions._element = {
style: {},
addEventListener: () => {},
removeEventListener: () => {}
};
}
try {
this.at = new AnyTouch(atOptions);
} catch (e) {
console.error('AnyTouch初始化失败:', e);
// 降级方案：在小程序环境实现基本手势
this.handleGesture = this.createSimpleGestureHandler();
}
if (this.at) {
this.setupGestures();
console.log('AnyTouch手势处理器已初始化');
} else {
console.warn('使用简化手势处理器');
}
}
// 创建小程序专用的简化手势处理器
createSimpleGestureHandler() {
return {
run: (event) => {
// 小程序环境下的基本手势实现
const touches = event.touches || [];
if (touches.length === 1) {
// 单指移动
this._handlePan(touches[0]);
} else if (touches.length > 1) {
// 双指缩放
this._handlePinch(touches);
}
}
};
}
setupGestures() {
// 平移手势 - 修复版本
this.at.on('pan', (event) => {
if (event.type === 'panstart') {
console.log('panstart', event);
// 重置移动开始状态
this.panStarted = false;
}
else if (event.type === 'panmove') {
// 检查是否超过阈值
const distance = Math.sqrt(event.deltaX**2 + event.deltaY**2);
if (!this.panStarted && distance < this.panThreshold) {
return; // 小于阈值不处理
}
if (!this.panStarted) {
console.log('拖动手势开始');
this.panStarted = true;
}
// 基于当前缩放比例修正移动量
const currentScale = Math.sqrt(
this.transformMatrix.a * this.transformMatrix.a +
this.transformMatrix.b * this.transformMatrix.b
);
// 逆缩放移动量
const dx = event.deltaX / currentScale;
const dy = event.deltaY / currentScale;
console.log(`平移: deltaX=${event.deltaX}, deltaY=${event.deltaY} | 修正后: dx=${dx}, dy=${dy}`);
this.transformMatrix.translate(dx, dy);
} else if (event.type === 'panend') {
this.panStarted = false;
}
});
// 缩放手势 - 修复版本
this.at.on('pinch', (event) => {
if (event.type === 'pinchstart') {
this.lastScale = 1;
}
else if (event.type === 'pinchmove') {
// 计算缩放变化量
const scaleChange = event.scale / this.lastScale;
this.lastScale = event.scale;
// 使用两指中心点
const centerX = event.center.x;
const centerY = event.center.y;
console.log(`缩放: scale=${event.scale} | 变化=${scaleChange} | 中心点: (${centerX}, ${centerY})`);
// 应用缩放
this.transformMatrix.scale(scaleChange, scaleChange, centerX, centerY);
}
});
// 点击手势
this.at.on('tap', (event) => {
console.log('点击事件', event);
});
// 长按手势
this.at.on('press', (event) => {
console.log('长按事件', event);
});
}
// 公共接口保持不变
catchEvent(event) {
try {
if (this.at) {
this.at.run(event);
} else {
// 内部处理降级方案
const touches = event.touches || [];
const eventType = event.type;
// 在事件开始时重置状态
if (eventType === 'touchstart') {
this.lastPoint = null;
this.lastPoints = null;
this.lastDistance = null;
}
// 处理不同数量的手指
if (touches.length === 1) {
this._handlePan(touches[0]);
} else if (touches.length > 1) {
this._handlePinch(touches);
}
}
} catch (e) {
console.error('手势处理错误:', e);
}
}
// 基础平移手势处理
_handlePan(touch) {
const pointX = touch.x || (touch.clientX - this.containerRect.left);
const pointY = touch.y || (touch.clientY - this.containerRect.top);
if (this.lastPoint) {
// 基于容器坐标系的增量计算
const dx = pointX - this.lastPoint.x;
const dy = pointY - this.lastPoint.y;
// 使用真实增量，不需要缩放修正
this.transformMatrix.translate(dx, dy);
}
// 存储当前点 (容器坐标系)
this.lastPoint = {x: pointX, y: pointY};
}
// 基础缩放手势处理
_handlePinch(touches) {
const point1 = touches[0];
const point2 = touches[1];
// 获取容器坐标系坐标
const getPoint = (touch) => ({
x: touch.x || (touch.clientX - this.containerRect.left),
y: touch.y || (touch.clientY - this.containerRect.top)
});
const currentPoints = [getPoint(point1), getPoint(point2)];
if (this.lastPoints) {
// 计算当前距离 (容器坐标系)
const currentDistance = Math.sqrt(
Math.pow(currentPoints[1].x - currentPoints[0].x, 2) +
Math.pow(currentPoints[1].y - currentPoints[0].y, 2)
);
// 上次距离 (容器坐标系)
const prevDistance = Math.sqrt(
Math.pow(this.lastPoints[1].x - this.lastPoints[0].x, 2) +
Math.pow(this.lastPoints[1].y - this.lastPoints[0].y, 2)
);
// 缩放比例
if (prevDistance > 0 && currentDistance > 0) {
const scaleChange = currentDistance / prevDistance;
// 计算中心点 (容器坐标系)
const centerX = (currentPoints[0].x + currentPoints[1].x) / 2;
const centerY = (currentPoints[0].y + currentPoints[1].y) / 2;
this.transformMatrix.scale(scaleChange, scaleChange, centerX, centerY);
}
}
// 存储当前点
this.lastPoints = currentPoints;
}
}
export default GestureHandler;

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pages/index/index.vue Normal file
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<template>
<view>
<canvas
id="myCanvas"
canvas-id="myCanvas"
type="2d"
style="width: 300px; height: 200px; border: 1px solid #eee;"
></canvas>
</view>
</template>
<script>
export default {
onReady() {
this.drawImageOnCanvas();
},
methods: {
drawImageOnCanvas() {
// 获取Canvas节点
const query = uni.createSelectorQuery().in(this);
query.select('#myCanvas')
.fields({ node: true, size: true })
.exec(async (res) => {
if (!res[0]) return;
const canvas = res[0].node;
const ctx = canvas.getContext('2d');
const dpr = uni.getSystemInfoSync().pixelRatio;
this.canvas = canvas
// 适配高清屏
canvas.width = res[0].width * dpr;
canvas.height = res[0].height * dpr;
ctx.scale(dpr, dpr);
// 加载图片
try {
const image = await this.loadImage('https://assets.tech.troyrc.com/sx25/images/background/odertupian.png');
ctx.drawImage(image, 0, 0, 300, 200);
} catch (e) {
console.error("图片加载失败:", e);
// 可选：绘制错误提示
ctx.fillStyle = '#f0f0f0';
ctx.fillRect(0, 0, 300, 200);
ctx.fillStyle = '#999';
ctx.textAlign = 'center';
ctx.fillText('图片加载失败', 150, 100);
}
});
},
loadImage(src) {
return new Promise((resolve, reject) => {
const image = this.canvas.createImage();
image.onload = () => resolve(image);
image.onerror = reject;
image.src = src;
});
}
}
}
</script>

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pages/index/transform-canvas.vue
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<template>
<canvas
canvas-id="gestureCanvas"
:style="{ width: canvasWidth + 'px', height: canvasHeight + 'px' }"
/>
</template>
<script>
export default {
props: {
width: Number,
height: Number,
matrix: Object
},
data() {
return {
ctx: null,
canvasWidth: this.width,
canvasHeight: this.height
};
},
mounted() {
this.initCanvas();
},
methods: {
initCanvas() {
this.ctx = uni.createCanvasContext('gestureCanvas', this);
const pixelRatio = uni.getSystemInfoSync().pixelRatio;
this.ctx.scale(pixelRatio, pixelRatio);
},
applyTransform(matrix) {
if (!matrix) return;
// 核心修复：考虑像素比的转换
const pixelRatio = uni.getSystemInfoSync().pixelRatio;
const tx = matrix.tx * pixelRatio;
const ty = matrix.ty * pixelRatio;
// 直接设置完整的变换矩阵
this.ctx.setTransform(
matrix.a,
matrix.b,
matrix.c,
matrix.d,
tx,
ty
);
},
// 调试网格
// drawDebugGrid() {
// if (!this.ctx) return;
// const pixelRatio = uni.getSystemInfoSync().pixelRatio;
// const width = this.canvasWidth * pixelRatio;
// const height = this.canvasHeight * pixelRatio;
// // 保存当前状态
// this.ctx.save();
// // 重置变换
// this.ctx.setTransform(1, 0, 0, 1, 0, 0);
// // 绘制网格
// this.ctx.strokeStyle = 'rgba(200, 200, 200, 0.3)';
// this.ctx.lineWidth = 1;
// // 横向线
// for (let y = 0; y <= height; y += 50) {
// this.ctx.beginPath();
// this.ctx.moveTo(0, y);
// this.ctx.lineTo(width, y);
// this.ctx.stroke();
// }
// // 纵向线
// for (let x = 0; x <= width; x += 50) {
// this.ctx.beginPath();
// this.ctx.moveTo(x, 0);
// this.ctx.lineTo(x, height);
// this.ctx.stroke();
// }
// // 绘制坐标轴
// this.ctx.strokeStyle = '#ff0000';
// this.ctx.lineWidth = 2;
// this.ctx.beginPath();
// this.ctx.moveTo(0, 0);
// this.ctx.lineTo(width, 0);
// this.ctx.stroke();
// this.ctx.beginPath();
// this.ctx.moveTo(0, 0);
// this.ctx.lineTo(0, height);
// this.ctx.stroke();
// // 恢复之前的状态
// this.ctx.restore();
// this.ctx.draw();
// },
// 绘制主内容
draw() {
if (!this.ctx) {
console.warn('Canvas上下文未初始化');
return;
}
// 1. 清除Canvas
this.clearCanvas();
// 2. 应用当前变换
this.applyTransform(this.matrix);
// 3. 绘制内容
this.drawContent();
},
clearCanvas() {
const pixelRatio = uni.getSystemInfoSync().pixelRatio;
const width = this.canvasWidth * pixelRatio;
const height = this.canvasHeight * pixelRatio;
// 重置变换
this.ctx.setTransform(1, 0, 0, 1, 0, 0);
this.ctx.clearRect(0, 0, width, height);
},
drawContent() {
// 绘制一个矩形和圆形
this.ctx.fillStyle = '#3498db';
this.ctx.fillRect(50, 50, 100, 100);
this.ctx.fillStyle = '#e74c3c';
this.ctx.beginPath();
this.ctx.arc(150, 150, 50, 0, 2 * Math.PI);
this.ctx.fill();
// 绘制一个文字
this.ctx.fillStyle = '#2c3e50';
this.ctx.font = '20px sans-serif';
this.ctx.fillText('手势Canvas', 50, 250);
// 执行绘制
this.ctx.draw();
}
}
};
</script>

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pages/index/transform-matrix.js
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class TransformMatrix {
constructor() {
this.reset();
}
reset() {
this.a = 1; // 水平缩放
this.b = 0; // 垂直倾斜
this.c = 0; // 水平倾斜
this.d = 1; // 垂直缩放
this.tx = 0; // 水平移动
this.ty = 0; // 垂直移动
this.stack = [];
}
translate(dx, dy) {
this.tx += this.a * dx + this.c * dy;
this.ty += this.b * dx + this.d * dy;
}
scale(sx, sy, cx = 0, cy = 0) {
// 移动到中心点
this.translate(cx, cy);
// 应用缩放
this.a *= sx;
this.b *= sx;
this.c *= sy;
this.d *= sy;
// 移回原位置
this.translate(-cx, -cy);
}
toArray() {
return [this.a, this.b, this.c, this.d, this.tx, this.ty];
}
// 用于调试的字符串表示
toString() {
return `[${this.a.toFixed(2)}, ${this.b.toFixed(2)}, ${this.c.toFixed(2)}, ${this.d.toFixed(2)}, ${this.tx.toFixed(1)}, ${this.ty.toFixed(1)}]`;
}
// 克隆方法
clone() {
const clone = new TransformMatrix();
clone.a = this.a;
clone.b = this.b;
clone.c = this.c;
clone.d = this.d;
clone.tx = this.tx;
clone.ty = this.ty;
return clone;
}
}
export default TransformMatrix;

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unpackage/dist/dev/.sourcemap/mp-weixin/common/vendor.js.map vendored
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unpackage/dist/dev/.sourcemap/mp-weixin/pages/index/index.js.map vendored
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{"version":3,"file":"index.js","sources":["pages/index/index.vue?type=page"],"sourcesContent":["import MiniProgramPage from '/Users/sunmeng/Desktop/wx/canvas/pages/index/index.vue'\nwx.createPage(MiniProgramPage)"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;AACA,GAAG,WAAW,eAAe;"}
{"version":3,"file":"index.js","sources":["pages/index/index.vue?type=page"],"sourcesContent":["import MiniProgramPage from '/Users/sunmeng/Desktop/wx/canvas/pages/index/index.vue'\nwx.createPage(MiniProgramPage)"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;AACA,GAAG,WAAW,eAAe;"}

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unpackage/dist/dev/mp-weixin/app.js vendored
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Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const common_vendor = require("./common/vendor.js");
if (!Math) {
"./pages/index/gesture-canvas-page.js";
"./pages/index/index.js";
}
const _sfc_main = {
onLaunch: function() {

2
unpackage/dist/dev/mp-weixin/app.json vendored
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{
"pages": [
"pages/index/gesture-canvas-page"
"pages/index/index"
],
"window": {
"navigationBarTextStyle": "black",

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unpackage/dist/dev/mp-weixin/common/vendor.js vendored
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unpackage/dist/dev/mp-weixin/pages/index/gesture-canvas-page.js vendored
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"use strict";
const common_vendor = require("../../common/vendor.js");
const pages_index_transformMatrix = require("./transform-matrix.js");
const pages_index_gestureHandler = require("./gesture-handler.js");
const TransformCanvas = () => "./transform-canvas.js";
const _sfc_main = {
components: {
TransformCanvas
},
data() {
return {
canvasWidth: 300,
canvasHeight: 300,
transformMatrix: new pages_index_transformMatrix.TransformMatrix(),
gestureHandler: null,
containerRect: null,
gestureStatus: "等待手势...",
scaleValue: 1,
touchPoints: 0,
lastGestureTime: 0
};
},
async mounted() {
await this.getContainerPosition();
this.initGestureHandler();
this.$nextTick(() => {
this.updateCanvas();
});
},
methods: {
// 独立的手势初始化方法
initGestureHandler() {
try {
this.gestureHandler = new pages_index_gestureHandler.GestureHandler(this, this.transformMatrix, {
container: this.containerRect
});
} catch (e) {
common_vendor.index.__f__("error", "at pages/index/gesture-canvas-page.vue:76", "手势处理器初始化失败:", e);
this.gestureHandler = {
catchEvent: (event) => {
if (event.touches.length > 0) {
const firstTouch = event.touches[0];
const x = firstTouch.clientX - this.containerRect.left;
const y = firstTouch.clientY - this.containerRect.top;
this.gestureStatus = "降级模式: 单指拖动";
this.touchPoints = event.touches.length;
if (event.type === "touchmove") {
this.transformMatrix.tx = x;
this.transformMatrix.ty = y;
this.updateCanvas();
}
}
}
};
}
},
async getContainerPosition() {
let retryCount = 0;
const maxRetries = 3;
while (retryCount < maxRetries) {
try {
const rect = await new Promise((resolve) => {
const query = common_vendor.index.createSelectorQuery().in(this);
query.select(".gesture-container").boundingClientRect((res) => {
resolve(res);
}).exec();
});
if (rect) {
this.containerRect = {
left: rect.left,
top: rect.top,
width: rect.width,
height: rect.height
};
common_vendor.index.__f__("log", "at pages/index/gesture-canvas-page.vue:123", "成功获取容器位置:", this.containerRect);
return;
}
} catch (e) {
common_vendor.index.__f__("error", "at pages/index/gesture-canvas-page.vue:127", "获取容器位置失败:", e);
}
await new Promise((r) => setTimeout(r, 100));
retryCount++;
}
common_vendor.index.__f__("error", "at pages/index/gesture-canvas-page.vue:135", `容器位置获取失败，已重试${maxRetries}次`);
},
// 事件处理
async handleTouchEvent(event) {
if (!this.gestureHandler || !this.containerRect) {
common_vendor.index.__f__("warn", "at pages/index/gesture-canvas-page.vue:141", "手势处理器未就绪，尝试重新初始化...");
await this.getContainerPosition();
this.initGestureHandler();
if (event.type === "touchend" || event.type === "touchcancel") {
this.lastPoint = null;
this.lastPoints = null;
this.gestureStatus = "结束";
this.updateCanvas();
return;
}
if (this.gestureHandler) {
return this.handleTouchEvent(event);
}
if (!this.at) {
if (correctedEvent.touches.length === 1) {
this.handlePan(correctedEvent.touches[0]);
} else if (correctedEvent.touches.length > 1) {
this.handlePinch(correctedEvent.touches);
}
}
return;
}
const currentTime = Date.now();
this.touchPoints = event.touches.length;
const correctedTouches = Array.from(event.touches).map((touch) => {
const x = touch.clientX - this.containerRect.left;
const y = touch.clientY - this.containerRect.top;
common_vendor.index.__f__("log", "at pages/index/gesture-canvas-page.vue:181", `原始坐标: (${touch.clientX}, ${touch.clientY}) 修正后: (${x}, ${y})`);
return {
...touch,
x,
y
};
});
const correctedEvent = {
...event,
touches: correctedTouches,
changedTouches: correctedTouches
};
this.gestureHandler.catchEvent(correctedEvent);
if (event.type === "touchstart") {
this.gestureStatus = event.touches.length > 1 ? "双指开始" : "单指开始";
} else if (event.type === "touchmove") {
this.gestureStatus = event.touches.length > 1 ? "双指缩放/移动" : "单指移动";
} else {
this.gestureStatus = "结束";
}
if (currentTime - this.lastGestureTime > 50) {
this.lastGestureTime = currentTime;
this.updateCanvas();
}
},
// 更新Canvas（性能优化版）
updateCanvas() {
this.$nextTick(() => {
const canvas = this.$refs.canvasRef;
if (canvas) {
canvas.draw();
this.scaleValue = Math.sqrt(
this.transformMatrix.a * this.transformMatrix.a + this.transformMatrix.b * this.transformMatrix.b
);
}
});
},
// 重置画布
resetCanvas() {
this.transformMatrix.reset();
this.scaleValue = 1;
this.gestureStatus = "画布已重置";
this.updateCanvas();
},
// 放大
zoomIn() {
this.transformMatrix.scale(1.2, 1.2, this.canvasWidth / 2, this.canvasHeight / 2);
this.updateCanvas();
},
// 缩小
zoomOut() {
this.transformMatrix.scale(0.8, 0.8, this.canvasWidth / 2, this.canvasHeight / 2);
this.updateCanvas();
}
}
};
if (!Array) {
const _component_transform_canvas = common_vendor.resolveComponent("transform-canvas");
_component_transform_canvas();
}
function _sfc_render(_ctx, _cache, $props, $setup, $data, $options) {
return {
a: common_vendor.t($data.scaleValue.toFixed(2)),
b: common_vendor.t($data.transformMatrix.tx.toFixed(1)),
c: common_vendor.t($data.transformMatrix.ty.toFixed(1)),
d: common_vendor.t($data.gestureStatus),
e: common_vendor.t($data.touchPoints),
f: common_vendor.sr("canvasRef", "2e633000-0"),
g: common_vendor.p({
width: $data.canvasWidth,
height: $data.canvasHeight,
matrix: $data.transformMatrix
}),
h: common_vendor.o((...args) => $options.handleTouchEvent && $options.handleTouchEvent(...args)),
i: common_vendor.o((...args) => $options.handleTouchEvent && $options.handleTouchEvent(...args)),
j: common_vendor.o((...args) => $options.handleTouchEvent && $options.handleTouchEvent(...args)),
k: common_vendor.o((...args) => $options.handleTouchEvent && $options.handleTouchEvent(...args)),
l: common_vendor.o((...args) => $options.resetCanvas && $options.resetCanvas(...args)),
m: common_vendor.o((...args) => $options.zoomIn && $options.zoomIn(...args)),
n: common_vendor.o((...args) => $options.zoomOut && $options.zoomOut(...args))
};
}
const MiniProgramPage = /* @__PURE__ */ common_vendor._export_sfc(_sfc_main, [["render", _sfc_render], ["__scopeId", "data-v-2e633000"]]);
wx.createPage(MiniProgramPage);
//# sourceMappingURL=../../../.sourcemap/mp-weixin/pages/index/gesture-canvas-page.js.map

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unpackage/dist/dev/mp-weixin/pages/index/gesture-canvas-page.json vendored
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@ -1,6 +0,0 @@
{
"navigationBarTitleText": "",
"usingComponents": {
"transform-canvas": "./transform-canvas"
}
}

1
unpackage/dist/dev/mp-weixin/pages/index/gesture-canvas-page.wxml vendored
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@ -1 +0,0 @@
<view class="container data-v-2e633000"><view class="gesture-container data-v-2e633000" bindtouchstart="{{h}}" bindtouchmove="{{i}}" bindtouchend="{{j}}" bindtouchcancel="{{k}}"><view class="debug-info data-v-2e633000"><text class="data-v-2e633000">缩放: {{a}} | X: {{b}} | Y: {{c}}</text><text class="data-v-2e633000">手势: {{d}}</text><text class="data-v-2e633000">触点: {{e}}</text></view><transform-canvas wx:if="{{g}}" class="r data-v-2e633000" u-r="canvasRef" u-i="2e633000-0" bind:__l="__l" u-p="{{g}}"/></view><view class="controls data-v-2e633000"><button class="data-v-2e633000" bindtap="{{l}}">重置</button><button class="data-v-2e633000" bindtap="{{m}}">放大</button><button class="data-v-2e633000" bindtap="{{n}}">缩小</button></view></view>

37
unpackage/dist/dev/mp-weixin/pages/index/gesture-canvas-page.wxss vendored
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@ -1,37 +0,0 @@
.container.data-v-2e633000 {
padding: 20px;
}
.gesture-container.data-v-2e633000 {
position: relative;
width: 300px;
height: 300px;
border: 1px solid #ccc;
margin: 0 auto;
}
.debug-info.data-v-2e633000 {
position: absolute;
bottom: 0;
left: 0;
right: 0;
background: rgba(0,0,0,0.6);
color: white;
padding: 5px;
font-size: 12px;
z-index: 10;
display: flex;
flex-direction: column;
}
.controls.data-v-2e633000 {
margin-top: 20px;
display: flex;
justify-content: center;
gap: 10px;
}
button.data-v-2e633000 {
padding: 8px 16px;
background: #4a8cff;
color: white;
border: none;
border-radius: 4px;
}

156
unpackage/dist/dev/mp-weixin/pages/index/gesture-handler.js vendored
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@ -1,156 +0,0 @@
"use strict";
const common_vendor = require("../../common/vendor.js");
class GestureHandler {
constructor(context, transformMatrix, { container }) {
this.transformMatrix = transformMatrix;
this.containerRect = container;
this.panThreshold = 5;
this.panStarted = false;
const atOptions = {
getPoint: (touch) => ({
x: touch.clientX - this.containerRect.left,
y: touch.clientY - this.containerRect.top
}),
preventDefault: false
};
if (typeof window === "undefined" || typeof HTMLElement === "undefined") {
atOptions._element = {
style: {},
addEventListener: () => {
},
removeEventListener: () => {
}
};
}
try {
this.at = new common_vendor.i(atOptions);
} catch (e) {
common_vendor.index.__f__("error", "at pages/index/gesture-handler.js:32", "AnyTouch初始化失败:", e);
this.handleGesture = this.createSimpleGestureHandler();
}
if (this.at) {
this.setupGestures();
common_vendor.index.__f__("log", "at pages/index/gesture-handler.js:39", "AnyTouch手势处理器已初始化");
} else {
common_vendor.index.__f__("warn", "at pages/index/gesture-handler.js:41", "使用简化手势处理器");
}
}
// 创建小程序专用的简化手势处理器
createSimpleGestureHandler() {
return {
run: (event) => {
const touches = event.touches || [];
if (touches.length === 1) {
this._handlePan(touches[0]);
} else if (touches.length > 1) {
this._handlePinch(touches);
}
}
};
}
setupGestures() {
this.at.on("pan", (event) => {
if (event.type === "panstart") {
common_vendor.index.__f__("log", "at pages/index/gesture-handler.js:67", "panstart", event);
this.panStarted = false;
} else if (event.type === "panmove") {
const distance = Math.sqrt(event.deltaX ** 2 + event.deltaY ** 2);
if (!this.panStarted && distance < this.panThreshold) {
return;
}
if (!this.panStarted) {
common_vendor.index.__f__("log", "at pages/index/gesture-handler.js:80", "拖动手势开始");
this.panStarted = true;
}
const currentScale = Math.sqrt(
this.transformMatrix.a * this.transformMatrix.a + this.transformMatrix.b * this.transformMatrix.b
);
const dx = event.deltaX / currentScale;
const dy = event.deltaY / currentScale;
common_vendor.index.__f__("log", "at pages/index/gesture-handler.js:95", `平移: deltaX=${event.deltaX}, deltaY=${event.deltaY} | 修正后: dx=${dx}, dy=${dy}`);
this.transformMatrix.translate(dx, dy);
} else if (event.type === "panend") {
this.panStarted = false;
}
});
this.at.on("pinch", (event) => {
if (event.type === "pinchstart") {
this.lastScale = 1;
} else if (event.type === "pinchmove") {
const scaleChange = event.scale / this.lastScale;
this.lastScale = event.scale;
const centerX = event.center.x;
const centerY = event.center.y;
common_vendor.index.__f__("log", "at pages/index/gesture-handler.js:117", `缩放: scale=${event.scale} | 变化=${scaleChange} | 中心点: (${centerX}, ${centerY})`);
this.transformMatrix.scale(scaleChange, scaleChange, centerX, centerY);
}
});
this.at.on("tap", (event) => {
common_vendor.index.__f__("log", "at pages/index/gesture-handler.js:126", "点击事件", event);
});
this.at.on("press", (event) => {
common_vendor.index.__f__("log", "at pages/index/gesture-handler.js:131", "长按事件", event);
});
}
// 公共接口保持不变
catchEvent(event) {
try {
if (this.at) {
this.at.run(event);
} else {
const touches = event.touches || [];
const eventType = event.type;
if (eventType === "touchstart") {
this.lastPoint = null;
this.lastPoints = null;
this.lastDistance = null;
}
if (touches.length === 1) {
this._handlePan(touches[0]);
} else if (touches.length > 1) {
this._handlePinch(touches);
}
}
} catch (e) {
common_vendor.index.__f__("error", "at pages/index/gesture-handler.js:161", "手势处理错误:", e);
}
}
// 基础平移手势处理
_handlePan(touch) {
const pointX = touch.x || touch.clientX - this.containerRect.left;
const pointY = touch.y || touch.clientY - this.containerRect.top;
if (this.lastPoint) {
const dx = pointX - this.lastPoint.x;
const dy = pointY - this.lastPoint.y;
this.transformMatrix.translate(dx, dy);
}
this.lastPoint = { x: pointX, y: pointY };
}
// 基础缩放手势处理
_handlePinch(touches) {
const point1 = touches[0];
const point2 = touches[1];
const getPoint = (touch) => ({
x: touch.x || touch.clientX - this.containerRect.left,
y: touch.y || touch.clientY - this.containerRect.top
});
const currentPoints = [getPoint(point1), getPoint(point2)];
if (this.lastPoints) {
const currentDistance = Math.sqrt(
Math.pow(currentPoints[1].x - currentPoints[0].x, 2) + Math.pow(currentPoints[1].y - currentPoints[0].y, 2)
);
const prevDistance = Math.sqrt(
Math.pow(this.lastPoints[1].x - this.lastPoints[0].x, 2) + Math.pow(this.lastPoints[1].y - this.lastPoints[0].y, 2)
);
if (prevDistance > 0 && currentDistance > 0) {
const scaleChange = currentDistance / prevDistance;
const centerX = (currentPoints[0].x + currentPoints[1].x) / 2;
const centerY = (currentPoints[0].y + currentPoints[1].y) / 2;
this.transformMatrix.scale(scaleChange, scaleChange, centerX, centerY);
}
}
this.lastPoints = currentPoints;
}
}
exports.GestureHandler = GestureHandler;
//# sourceMappingURL=../../../.sourcemap/mp-weixin/pages/index/gesture-handler.js.map

48
unpackage/dist/dev/mp-weixin/pages/index/index.js vendored Normal file
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@ -0,0 +1,48 @@
"use strict";
const common_vendor = require("../../common/vendor.js");
const _sfc_main = {
onReady() {
this.drawImageOnCanvas();
},
methods: {
drawImageOnCanvas() {
const query = common_vendor.index.createSelectorQuery().in(this);
query.select("#myCanvas").fields({ node: true, size: true }).exec(async (res) => {
if (!res[0])
return;
const canvas = res[0].node;
const ctx = canvas.getContext("2d");
const dpr = common_vendor.index.getSystemInfoSync().pixelRatio;
this.canvas = canvas;
canvas.width = res[0].width * dpr;
canvas.height = res[0].height * dpr;
ctx.scale(dpr, dpr);
try {
const image = await this.loadImage("https://assets.tech.troyrc.com/sx25/images/background/odertupian.png");
ctx.drawImage(image, 0, 0, 300, 200);
} catch (e) {
common_vendor.index.__f__("error", "at pages/index/index.vue:40", "图片加载失败:", e);
ctx.fillStyle = "#f0f0f0";
ctx.fillRect(0, 0, 300, 200);
ctx.fillStyle = "#999";
ctx.textAlign = "center";
ctx.fillText("图片加载失败", 150, 100);
}
});
},
loadImage(src) {
return new Promise((resolve, reject) => {
const image = this.canvas.createImage();
image.onload = () => resolve(image);
image.onerror = reject;
image.src = src;
});
}
}
};
function _sfc_render(_ctx, _cache, $props, $setup, $data, $options) {
return {};
}
const MiniProgramPage = /* @__PURE__ */ common_vendor._export_sfc(_sfc_main, [["render", _sfc_render]]);
wx.createPage(MiniProgramPage);
//# sourceMappingURL=../../../.sourcemap/mp-weixin/pages/index/index.js.map

4
unpackage/dist/dev/mp-weixin/pages/index/index.json vendored Normal file
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@ -0,0 +1,4 @@
{
"navigationBarTitleText": "",
"usingComponents": {}
}

1
unpackage/dist/dev/mp-weixin/pages/index/index.wxml vendored Normal file
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@ -0,0 +1 @@
<view><canvas id="myCanvas" canvas-id="myCanvas" type="2d" style="width:300px;height:200px;border:1px solid #eee"></canvas></view>

0
unpackage/dist/dev/mp-weixin/pages/index/transform-canvas.wxss → unpackage/dist/dev/mp-weixin/pages/index/index.wxss vendored
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121
unpackage/dist/dev/mp-weixin/pages/index/transform-canvas.js vendored
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@ -1,121 +0,0 @@
"use strict";
const common_vendor = require("../../common/vendor.js");
const _sfc_main = {
props: {
width: Number,
height: Number,
matrix: Object
},
data() {
return {
ctx: null,
canvasWidth: this.width,
canvasHeight: this.height
};
},
mounted() {
this.initCanvas();
},
methods: {
initCanvas() {
this.ctx = common_vendor.index.createCanvasContext("gestureCanvas", this);
const pixelRatio = common_vendor.index.getSystemInfoSync().pixelRatio;
this.ctx.scale(pixelRatio, pixelRatio);
},
applyTransform(matrix) {
if (!matrix)
return;
const pixelRatio = common_vendor.index.getSystemInfoSync().pixelRatio;
const tx = matrix.tx * pixelRatio;
const ty = matrix.ty * pixelRatio;
this.ctx.setTransform(
matrix.a,
matrix.b,
matrix.c,
matrix.d,
tx,
ty
);
},
// 调试网格
// drawDebugGrid() {
// if (!this.ctx) return;
// const pixelRatio = uni.getSystemInfoSync().pixelRatio;
// const width = this.canvasWidth * pixelRatio;
// const height = this.canvasHeight * pixelRatio;
// // 保存当前状态
// this.ctx.save();
// // 重置变换
// this.ctx.setTransform(1, 0, 0, 1, 0, 0);
// // 绘制网格
// this.ctx.strokeStyle = 'rgba(200, 200, 200, 0.3)';
// this.ctx.lineWidth = 1;
// // 横向线
// for (let y = 0; y <= height; y += 50) {
// this.ctx.beginPath();
// this.ctx.moveTo(0, y);
// this.ctx.lineTo(width, y);
// this.ctx.stroke();
// }
// // 纵向线
// for (let x = 0; x <= width; x += 50) {
// this.ctx.beginPath();
// this.ctx.moveTo(x, 0);
// this.ctx.lineTo(x, height);
// this.ctx.stroke();
// }
// // 绘制坐标轴
// this.ctx.strokeStyle = '#ff0000';
// this.ctx.lineWidth = 2;
// this.ctx.beginPath();
// this.ctx.moveTo(0, 0);
// this.ctx.lineTo(width, 0);
// this.ctx.stroke();
// this.ctx.beginPath();
// this.ctx.moveTo(0, 0);
// this.ctx.lineTo(0, height);
// this.ctx.stroke();
// // 恢复之前的状态
// this.ctx.restore();
// this.ctx.draw();
// },
// 绘制主内容
draw() {
if (!this.ctx) {
common_vendor.index.__f__("warn", "at pages/index/transform-canvas.vue:110", "Canvas上下文未初始化");
return;
}
this.clearCanvas();
this.applyTransform(this.matrix);
this.drawContent();
},
clearCanvas() {
const pixelRatio = common_vendor.index.getSystemInfoSync().pixelRatio;
const width = this.canvasWidth * pixelRatio;
const height = this.canvasHeight * pixelRatio;
this.ctx.setTransform(1, 0, 0, 1, 0, 0);
this.ctx.clearRect(0, 0, width, height);
},
drawContent() {
this.ctx.fillStyle = "#3498db";
this.ctx.fillRect(50, 50, 100, 100);
this.ctx.fillStyle = "#e74c3c";
this.ctx.beginPath();
this.ctx.arc(150, 150, 50, 0, 2 * Math.PI);
this.ctx.fill();
this.ctx.fillStyle = "#2c3e50";
this.ctx.font = "20px sans-serif";
this.ctx.fillText("手势Canvas", 50, 250);
this.ctx.draw();
}
}
};
function _sfc_render(_ctx, _cache, $props, $setup, $data, $options) {
return {
a: $data.canvasWidth + "px",
b: $data.canvasHeight + "px"
};
}
const Component = /* @__PURE__ */ common_vendor._export_sfc(_sfc_main, [["render", _sfc_render]]);
wx.createComponent(Component);
//# sourceMappingURL=../../../.sourcemap/mp-weixin/pages/index/transform-canvas.js.map

4
unpackage/dist/dev/mp-weixin/pages/index/transform-canvas.json vendored
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@ -1,4 +0,0 @@
{
"component": true,
"usingComponents": {}
}

1
unpackage/dist/dev/mp-weixin/pages/index/transform-canvas.wxml vendored
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@ -1 +0,0 @@
<canvas canvas-id="gestureCanvas" style="{{'width:' + a + ';' + ('height:' + b)}}"/>

47
unpackage/dist/dev/mp-weixin/pages/index/transform-matrix.js vendored
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@ -1,47 +0,0 @@
"use strict";
class TransformMatrix {
constructor() {
this.reset();
}
reset() {
this.a = 1;
this.b = 0;
this.c = 0;
this.d = 1;
this.tx = 0;
this.ty = 0;
this.stack = [];
}
translate(dx, dy) {
this.tx += this.a * dx + this.c * dy;
this.ty += this.b * dx + this.d * dy;
}
scale(sx, sy, cx = 0, cy = 0) {
this.translate(cx, cy);
this.a *= sx;
this.b *= sx;
this.c *= sy;
this.d *= sy;
this.translate(-cx, -cy);
}
toArray() {
return [this.a, this.b, this.c, this.d, this.tx, this.ty];
}
// 用于调试的字符串表示
toString() {
return `[${this.a.toFixed(2)}, ${this.b.toFixed(2)}, ${this.c.toFixed(2)}, ${this.d.toFixed(2)}, ${this.tx.toFixed(1)}, ${this.ty.toFixed(1)}]`;
}
// 克隆方法
clone() {
const clone = new TransformMatrix();
clone.a = this.a;
clone.b = this.b;
clone.c = this.c;
clone.d = this.d;
clone.tx = this.tx;
clone.ty = this.ty;
return clone;
}
}
exports.TransformMatrix = TransformMatrix;
//# sourceMappingURL=../../../.sourcemap/mp-weixin/pages/index/transform-matrix.js.map