在h5页面使用dom-to-image将DOM元素生成的base64图片这个DOM有包含文字 背景图 和一些贴图 通过wx.saveImageToPhotosAlbum保存图片到手机 安卓和模拟器一切正常  ios手机保存到手机后 保存下来的图片无背景图 这个图片里面的图片也都不见了 这是安卓 [图片] ios [图片] 贴一下代码 onLoad(options) {         wx.getFileSystemManager().writeFile({             filePath: wx.env.USER_DATA_PATH + "/qrcode.png",             data: this.padStringToMultipleOfFour(options.base64.replace("data:image/png;base64,", "")),             encoding: "base64",             success: (res) => {                 console.log(res);                 wx.saveImageToPhotosAlbum({                     filePath: wx.env.USER_DATA_PATH + "/qrcode.png", //这是把临时文件 保存到 相册, 收工                     success: (res) => {                         wx.showToast({                             title: "保存成功 请打开相册查看",                             icon: "none"                         });                         setTimeout(() => {                             wx.navigateBack({                                 delta: 1                             })                         }, 1500)                     },                     fail: (error) => {                         console.log(1, error);                         wx.showToast({                             title: "保存失败 请截图保存",                             icon: "none"                         });                         setTimeout(() => {                             wx.navigateBack({                                 delta: 1                             })                         }, 1500)                     },                 });             },             fail: (error) => {                 console.log(2, error);                 wx.showToast({                     title: "保存失败 请截图保存",                     icon: "none"                 });                 setTimeout(() => {                     wx.navigateBack({                         delta: 1                     })                 }, 1500)             },         });     },     /**      * 补充base64的长度 变为4的倍数 要不ios不识别      * @param {*} str       */     padStringToMultipleOfFour(str) {         const length = str.length;         const remainder = length % 4;         if (remainder !== 0) {             const padding = 4 - remainder;             str += '='.repeat(padding);         }         return str;     },

   <van-field style="flex:1"  type="number" value="{{ username3 }}" required label="仪表盘里程"  input-align="right"  van-field 使用placeholder安卓 ios都偏移 不使用ios偏移