wx.saveImageToPhotosAlbum，保存图片到相册，部分图片在ios会报错，无法保存，安卓正常

测试机型：

代码片段：https://developers.weixin.qq.com/s/wR4d2Tm67WvO

错误信息：saveImageToPhotosAlbum:fail save fail:Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service on pid 0 named com.apple.photos.service was interrupted, but the message was sent over an additional proxy and therefore this proxy has become invalid." UserInfo={NSDebugDescription=The connection to service on pid 0 named com.apple.photos.service was interrupted, but the message was sent over an additional proxy and therefore this proxy has become invalid.