//旋转图像   async RoImage(url) {     let autoRotate = this.data.autoRotate,       off = wx.createOffscreenCanvas({ type: '2d' }),       image = off.createImage();     await new Promise((resolve, reject) => {       wx.getImageInfo({         src: url, success(res) {           //image.src = url;           image.name = res.type;           //变量定义、赋值           let width = res.width,             height = res.height;           console.log('[RoImage]处理前尺寸: ' + width + ' x ' + height);           //绘制canvas 旋转图片           const $ = wx.createSelectorQuery();           $.select('#canvas').fields({ node: true, size: true }).exec((res) => {             const canvas = res[0].node;             const ctx = canvas.getContext('2d');             let bg = canvas.createImage();             bg.src = url;             bg.onload = () => {               if (height > width && autoRotate == '1') {//自动旋转                 //旋转图片开始                 console.log('旋转90度');                 //画板宽高调换                 canvas.width = height;                 canvas.height = width;                 //图片开始旋转                 ctx.translate(height / 2, width / 2);//原点移动到(/2, /2)中心点                 ctx.rotate(270 * Math.PI / 180);//-90度                 ctx.drawImage(bg, -width / 2, -height / 2, width, height);                 //图片宽高调换                 let ro_w = width, ro_h = height;                 width = ro_h; height = ro_w;                 console.log('[RoImage]处理后尺寸: ' + width + ' x ' + height);               } else {                 //画板宽高调换                 canvas.width = width;                 canvas.height = height;                 console.log('[RoImage]跳过旋转: ' + width + ' x ' + height);                 ctx.drawImage(bg, 0, 0, width, height);               }               //canvas转文件的临时路径 (本地路径)               wx.canvasToTempFilePath({                 canvas, quality: 1, fileType: "jpg",                 success: (res) => {                   //保存图片到本地                   wx.saveImageToPhotosAlbum({                     filePath: res.tempFilePath,                     success: (res) => {                       console.log(res);                     }                   });                   console.log('[RoImage]处理完成', res.tempFilePath);                   image.src = res.tempFilePath;                   image.onload = resolve;  // 绘制图片逻辑                 }               })             }           })         }, fail(res) {           image.src = url;           console.log(res);           image.onload = reject;  // 绘制图片逻辑         }       });     })     return image;   }, 开发者工具： [图片] ios真机： [图片][图片]

canvas没有旋转画布整个的方法 要怎么旋转？

用的2D绘制的签名，横屏签名的，需要上传旋转-90的canvas图，这要怎么操作，wx.canvasToTempFilePath之后再旋转绘制一遍？然后再走一遍wx.canvasToTempFilePath？谢谢

Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas or VideoFrame) wx.createSelectorQuery()       .select('#canvas') // 在 WXML 中填入的 id       .fields({         node: true,         size: true       })       .exec((res) => {         console.log(res)         dpr = wx.getSystemInfoSync().pixelRatio         canvas = res[0].node // 重点1         // console.log(canvas)         canvas.width = res[0].width * dpr         canvas.height = res[0].height * dpr         ctx.clearRect(0, 0, canvas.width, canvas.height)         ctx.beginPath();         ctx.scale(dpr, dpr)         bg = canvas.createImage()         bg.src = '/img/lz.jpg'         bg.onload = () => {           ctx.drawImage(bg, 0, 0)         }       }) ctx.drawImage(canvas,       magnifyRectangle.x - magnifyGlassRadius,        magnifyRectangle.y - magnifyGlassRadius,       magnifyRectangle.width,        magnifyRectangle.height,       magnifyRectangle.x - 2 * magnifyGlassRadius,        magnifyRectangle.y - 2 * magnifyGlassRadius,       scaledMagnifyRectangle.width,       scaledMagnifyRectangle.height     )

下面是我的代码，想通过wx.getImageInfo获取网络图片后，然后用drawImage在canvas上将图片显示出来，但是一直报错。 代码如下： onShow: function () { var that = this const query = wx.createSelectorQuery() query.select('#shareCanvas') .fields({ node: true, size: true }) .exec((res) => { const canvas = res[0].node const ctx = canvas.getContext('2d') const dpr = wx.getSystemInfoSync().pixelRatio canvas.width = res[0].width * dpr canvas.height = res[0].height * dpr ctx.scale(dpr, dpr) wx.getImageInfo({ src: that.data.photoUrl, success(res) { console.log("头像路径："+res.path) ctx.drawImage(res.path, 0, 0) ctx.draw() } }) }) }, 报错信息如下： thirdScriptError Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)';at api getImageInfo success callback function TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'     at CanvasRenderingContext2D.e.drawImage (http://127.0.0.1:51536/appservice/__dev__/WAService.js:2:647372)     at success (http://127.0.0.1:51536/appservice/pages/card/img.js:47:15)     at Function.o.<computed> (http://127.0.0.1:51536/appservice/__dev__/WAService.js:2:1366445)     at Object.success (http://127.0.0.1:51536/appservice/__dev__/WAService.js:2:124200)     at y (http://127.0.0.1:51536/appservice/__dev__/WAService.js:2:526317)     at v (http://127.0.0.1:51536/appservice/__dev__/WAService.js:2:526555)     at http://127.0.0.1:51536/appservice/__dev__/WAService.js:2:528109     at n.<anonymous> (http://127.0.0.1:51536/appservice/__dev__/asdebug.js:1:12078)     at http://127.0.0.1:51536/appservice/__dev__/WAService.js:2:124200     at http://127.0.0.1:51536/appservice/__dev__/WAService.js:2:107123

wx.previewMedia 没有退出按钮，再一次点击视频，无法退出播放，这怎么解决，或者怎么实现视频预览播放的效果，类似朋友圈的视频播放

search.submitPages 通过后端提交内容接入申请后页面是如何被关键词抓取展示的？ 是通过页面的标题还是什么呢？ 比如我的小程序页面标题是“首页”，但内容是动态加载的丰富信息，我们的信息将被如何的抓取并匹配展示呢？

开发人员如何引导用户将小程序添加桌面快捷方式？

小程序页面内容加图片（页面字数比较多），请问生成pdf文档有什么方法？ 除了从html到pdf，或生成图片。

框架类型问题类型API/组件名称终端类型微信版本基础库版本小程序需求chooseImage客户端7.0.12 wx.chooseImage sourceType : 'camera' 如何设置拍照图片不保存到本地相册； 目前照片是业务上的敏感信息；