iphone7

saveImg:function(){

wx.canvasToTempFilePath({

canvasId: ‘myCanvas’,

fileType:‘jpg’,

success: function (res) {

wx.saveImageToPhotosAlbum({

filePath: res.tempFilePath,

})

}

}, this)

}

保存 canvas图片无效，保存不了，打开不了本地文件夹，开发工具和安卓可以，求大神指点迷经