iOS开发之保存图片到手机相册

- (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:(voidvoid *)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 nil];  

        [alert show];  

          

    }else{  

      

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"保存失败" delegate:self cancelButtonTitle:nil otherButtonTitles:@"确定", nil nil];  

        [alert show];  

    }  

      

}