- (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];            }                    }