Question

使用动作handleLongPressOnPhotos将UILongPressGestureRecognizer添加到我的imageView。最相关的代码如下：

- (IBAction)handleLongPressOnPhotos:(UILongPressGestureRecognizer *)sender
{
self.imageWillBeSaved = (UIImageView *)sender.view; //breakPoint1
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Save the photo" otherButtonTitles: @"Go to the Original photo", nil];
actionSheet.actionSheetStyle = UIActionSheetStyleDefault;
[actionSheet showInView:self.view]; //breakPoint2
NSLog( @"actionSheet addr when created is %p", actionSheet );//breakPoint3
[actionSheet release];//breakPoint4
}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (buttonIndex) {
        case 0:
            UIImageWriteToSavedPhotosAlbum(self.imageWillBeSaved.image, self, @selector(image: didFinishSavingWithError:contextInfo:), nil);
            //[actionSheet dismissWithClickedButtonIndex:0 animated:YES]; i have tried to use this method here, but it didn't work.
            break;

        default:
            break;
    }
}

- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
    if (error != NULL)
    {
        // handle error
    }
    else 
    {
        // handle ok status
    }
}

单击“保存照片”按钮后，操作表将不会被解除。如果我再次单击该按钮，操作表将被解除，照片会保存两次。代码中有任何问题吗？提前谢谢！

聚苯乙烯。 imageView是scrollView的子视图，scrollView位于tableViewCell 中。

- (IBAction)handleLongPressOnPhotos:(UILongPressGestureRecognizer *)sender
{
self.imageWillBeSaved = (UIImageView *)sender.view; //breakPoint1
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Save the photo" otherButtonTitles: @"Go to the Original photo", nil];
actionSheet.actionSheetStyle = UIActionSheetStyleDefault;
[actionSheet showInView:self.view]; //breakPoint2
NSLog( @"actionSheet addr when created is %p", actionSheet );//breakPoint3
[actionSheet release];//breakPoint4
}

我在“handleLongPressOnPhotos：”方法中设置了两个断点，作为breakPoint1和breakPoint1。在imageView为longPressed之后，我按照代码的步骤进行操作。步骤顺序是：breakPoint1 - ＆gt; breakPoint2 - ＆gt; breakPoint1 - ＆gt; breakPoint2 - ＆gt; breakPoint3 - ＆gt; breakPoint4 - ＆gt; breakPoint3 - ＆gt; breakPoint4，然后出去了。很明显，actionSheet已经呈现两次，导致问题。这很奇怪，我不知道原因并避免这种情况。

其他问题解决了问题 UILongPressGestureRecognizer gets called twice when pressing down

感谢@Laddu，@ MichaelDautermann，@ sreecharan

Answer 1

看起来不错，但请在此处添加nslog： -

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{

  NSLog(@"buttonIndex.....%d",buttonIndex);

  switch (buttonIndex) {

     case 0:
        UIImageWriteToSavedPhotosAlbum(self.imageWillBeSaved.image, self, @selector(image: didFinishSavingWithError:contextInfo:), nil);

        //[actionSheet dismissWithClickedButtonIndex:0 animated:YES]; i have tried to use this method here, but it didn't work.

        break;

     default:
        break;
   }
}

检查您是否也在.h文件中添加ACtionSheet Delegate。

Answer 2

您有没有使用actionSheet:willDismissWithButtonIndex:代替actionSheet:clickedButtonAtIndex:的原因。

如果您使用actionSheet:willDismissWithButtonIndex:，则无需自行解雇ActionSheet。

Answer 3

另一个问题解决了问题UILongPressGestureRecognizer在按下时被调用两次

感谢@Laddu，@ MichaelDautermann，@ sreecharan

无法在此处解除操作表

3 个答案: