[iOS]将图片保存到本地相册

- (IBAction)saveImageToAlbum:(id)sender {
    UIImageWriteToSavedPhotosAlbum(self.imageView.image, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil);
}

- (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
    if (!error) {
        NSLog(@"保存成功");
    }
    else {
        NSLog(@"保存失败");
    }
}