iOS开发之保存图片到手机相册_io是开发保存图片到相册-优快云博客

本文详细介绍了如何使用Objective-C语言在iOS应用中加载、显示图片，并通过UIImageWriteToSavedPhotosAlbum方法将图片保存至用户的iPhone相册。通过实现UITapGestureRecognizer和自定义保存逻辑，开发者可以轻松地让用户将应用内的图片直接保存到设备的个人相册中，增强了用户体验。

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- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(60, 100, 200, 300)];
    _imageView.image = [UIImage imageNamed:@"hmt.jpg"];
    _imageView.userInteractionEnabled = YES;
    [self.view addSubview:_imageView];
    
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] init];
    tapGesture.numberOfTapsRequired = 1;
    tapGesture.numberOfTouchesRequired = 1;
    [tapGesture addTarget:self action:@selector(tapSaveImageToIphone)];
    [self.imageView addGestureRecognizer:tapGesture];

}

- (void)tapSaveImageToIphone{

    /**
     *  将图片保存到iPhone本地相册
     *  UIImage *image            图片对象
     *  id completionTarget       响应方法对象
     *  SEL completionSelector    方法
     *  void *contextInfo
     */
    UIImageWriteToSavedPhotosAlbum(self.imageView.image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
    
}

- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{

    if (error == nil) {
    
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"已存入手机相册" delegate:self cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
        [alert show];
        
    }else{
    
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"保存失败" delegate:self cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
        [alert show];
    }
    
}

@效果图: