Error:<Error>: ImageIO: CGImageReadCreateDataWithMappedFile...error = 2 (No such file or directory)

报错：
<Error>: ImageIO: CGImageReadGetBytesAtOffset : *** ERROR *** CGImageSource was created with data size: 23884 - current size is only: 1173
或
<Error>: ImageIO: CGImageReadCreateDataWithMappedFile...error = 2 (No such file or directory)

是通过本地路劲加载image出现错误了。需要先吧本地图片转成NSData，在赋值给image
NSString *path = [NSHomeDirectory() stringByAppendingString:@"/Documents/userphoto.png"];
NSData *data = [NSData dataWithContentsOfFile:path];
UIImage *image = [UIImage imageWithData:data];