如何保存僅長按和由用戶選擇的圖像

Question

目前，它保存的所有圖像，但我想只保存其中長按一個不是一次性全部圖像只有一個用戶選擇

- (void)viewDidLoad 

{ self.view.backgroundColor = [UIColor blackColor]; 
UIScrollView *imageScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; 
imageScrollView.pagingEnabled = YES; 
NSInteger numberOfViews = 61; 
for (int i = 0; i < numberOfViews; i++) { 
    CGFloat xOrigin = i * self.view.frame.size.width; 
    UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom]; 

    [myButton addTarget:self action:@selector(dismissView:) forControlEvents:UIControlEventTouchUpInside]; 

    myButton.frame = CGRectMake(xOrigin, 10, 60, 35); 

    //[myButton addGestureRecognizer:tap]; 

    [myButton.layer setMasksToBounds:YES]; 

    [myButton.layer setCornerRadius:10.0f]; 

    myButton.layer.borderWidth = 2; 

    myButton.layer.borderColor = [[UIColor whiteColor] CGColor]; 

    [myButton setTitle:@"Done" forState:UIControlStateNormal]; 

    myButton.backgroundColor = [UIColor clearColor]; 

    NSString *imageName = [NSString stringWithFormat:@"image%d.png", i]; 
    UIImage *image = [UIImage imageNamed:imageName]; 
    UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; 
    _imageView.tag = 128; 
    imageView.frame = CGRectMake(xOrigin, 0, self.view.frame.size.width, self.view.frame.size.height); 


    UILongPressGestureRecognizer *gestureRecognizer = [[UILongPressGestureRecognizer alloc] 
                 initWithTarget:self 
                 action:@selector(handleLongPress:)]; 

    //imageScrollView.userInteractionEnabled = YES; 
    [imageScrollView addGestureRecognizer:gestureRecognizer]; 
    gestureRecognizer.delegate = self; 
    [gestureRecognizer release]; 

    [imageScrollView addSubview:imageView]; 
    [imageScrollView addSubview:myButton]; 

    //[imageView release]; 

} 
imageScrollView.contentSize = CGSizeMake(self.view.frame.size.width * numberOfViews, self.view.frame.size.height); 

[self.view addSubview:imageScrollView]; 
[imageScrollView release]; 
} 


- (void)handleLongPress:(UILongPressGestureRecognizer*)gestureRecognizer{ 

if (gestureRecognizer.state == UIGestureRecognizerStateBegan){ 
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Save Photo", nil]; 
    actionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent; 
    [actionSheet showInView:self.view]; 
    [actionSheet release]; 

} 

} 

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { 
     NSInteger numberOfViews = 61; 
     for (int i = 0; i < numberOfViews; i++) { 
      NSString *imageName = [NSString stringWithFormat:@"image%d.png", i]; 
      UIImage *image = [UIImage imageNamed:imageName]; 
      UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; 
     UIImageWriteToSavedPhotosAlbum(imageView.image, self, @selector(image: didFinishSavingWithError:contextInfo:), nil); 


} 
} 

如何爲

感謝代碼幫助

Answer 1

在handleLongPress:功能，使用此：

UIGestureRecognizer *gestureRecognizer; 
CGPoint gesturePoint = [gestureRecognizer locationInView:self.view]; 

然後使用for循環檢查所有按鈕，就像您在那裏一樣。用它來檢查它是否是按下的圖像：

if(CGRectContainsPoint(myButton.frame,gesturePoint)){ 
    //save the image stored in myButton 

    //break will exit the for loop early, so if the view comes early in the list, 
    //it doesn't have to check the rest. 
    break; 
}