iOS开发之保存图片到手机相册详解手机开发

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