苏州网站设计kgwl,为什么网站要域名解析,男做直播网站好,公司做网站提供资料由于wx.compressImage(Object object) iOS 仅支持压缩 JPG 格式图片。所以我们需要做一下特殊的处理#xff1a;
1.获取文件#xff0c;判断文件是否大于设定的大小
2.如果大于则使用canvas进行绘制#xff0c;并生成新的图片路径
3.上传图片
async chooseImage() {let …由于wx.compressImage(Object object) iOS 仅支持压缩 JPG 格式图片。所以我们需要做一下特殊的处理
1.获取文件判断文件是否大于设定的大小
2.如果大于则使用canvas进行绘制并生成新的图片路径
3.上传图片
async chooseImage() {let res await wx.chooseMedia({count: 1,sizeType: [compressed],mediaType: [image]})if (res.tempFiles[0].size 500 * 1024) { //大于500k//压缩图片compressImage(res.tempFiles[0], #canvasId).then(result {this.uploadFile(result.tempFilePath)})} else {this.uploadFile(res.tempFiles[0].tempFilePath)}},
const compressImage function (file, node) {return new Promise((resolve, reject) {//获取图片的信息wx.getImageInfo({src: file.tempFilePath,success: async function (imageInfo) {//获取canvasconst query wx.createSelectorQuery()let canvasDom query.select(node) //画布idcanvasDom.fields({node: true,size: true}).exec((res) {const canvas res[0].nodecanvas.width 900 canvas.height 900const ctx canvas.getContext(2d)let img canvas.createImage();img.src imageInfo.path; //要压缩的图片路径img.onload () {// 将图片绘制到canvasctx.drawImage(img, 0, 0, canvas.width, canvas.height)// 生成图片wx.canvasToTempFilePath({canvas,destWidth: 900, //压缩后宽destHeight: 900, //压缩后高fileType: jpg,quality: 0.8, //质量可自定义success: (imgResult) {let fs wx.getFileSystemManager()fs.getFileInfo({filePath: imgResult.tempFilePath,success: (res) {//压缩后的图片如果还是大于500k那么继续压缩直到小于500为止if (res.size 500 * 1024) {compressImage(imgResult)} else {resolve(imgResult)}}})},fail: (err) {console.error(err);reject(err)}})}})},fail: function (err) {console.error(获取图片信息失败, err);}});})
}
uploadFile(avatarUrl) {if (avatarUrl) {wx.uploadFile({filePath: avatarUrl,name: file,url: http://139.224.49.138:888/mini/myPage/uploadAvatar,formData: {openid: getApp().globalData.openid},success: (res) {let {userInfo} app.store.getState();userInfo.headPic JSON.parse(res.data).urlapp.store.setState({userInfo: userInfo});},fail: err {console.log(err);}})}},
canvas hidden{{true}} type2d idcanvasId/
