//保存图片

saveImage: function() {

const fileManager = wx.getFileSystemManager()

console.log(this.data.codeSrc)

fileManager.writeFile({

filePath: wx.env.USER_DATA_PATH + ‘/test.png’,

data: this.data.codeSrc,    // 一串base64码

encoding: ‘base64’,

success: res => {

console.log(‘writeFile成功res’, res)

console.log(‘了路径’, wx.env.USER_DATA_PATH + ‘/test.png’)

this.setData({

imageUrl: wx.env.USER_DATA_PATH + ‘/test.png’,

})

wx.saveImageToPhotosAlbum({

filePath: wx.env.USER_DATA_PATH + ‘/test.png’,

success: res => {

wx.showToast({

title: ‘保存成功’

})

console.log(‘saveImageToPhotosAlbum成功res’, res)

},

fail: err => {

console.log(‘saveImageToPhotosAlbum失败’, err)

}

})

},

fail: err => {

console.log(‘writeFile失败’, err)

}

})

},

像上面那样写 为什么工具上可以保存 真机调试就无法保存