视图中的 UITapGesture 时不调用 UIButton 操作答案

【问题标题】：UIButton action is not called when UITapGesture in View视图中的 UITapGesture 时不调用 UIButton 操作
【发布时间】：2012-06-30 06:19:44
【问题描述】：

我有一个视图，并在该视图上添加了UITapGesture。现在，当我在视图中放置一个按钮并单击该按钮时，它不会调用按钮操作。

这是我的代码：

    ButtionView=[[UIView alloc]initWithFrame:CGRectMake(x, y, 84, 84)];
    ButtionView.tag=i;
    UIImageView *coverImageView = [[UIImageView alloc]     

    initWithFrame:CGRectMake(0,0,ButtionView.frame.size.width,84)];
    coverImageView.tag = i;
    UIButton *notesbutton=[UIButton buttonWithType:UIButtonTypeRoundedRect];
    notesbutton.frame=CGRectMake(0, 0,20,20);
    notesbutton.tag=i;

    [notesbutton addTarget:self action:@selector(buttonClickedForNotes:)      
    forControlEvents:UIControlEventTouchUpInside];
    [ButtionView addSubview:coverImageView];
    [ButtionView addSubview:notesbutton];
    [notesbutton bringSubviewToFront:ButtionView];
    [self.scrollview addSubview:ButtionView];
    [ButtionView addGestureRecognizer:oneFingerSingleTap];

-(IBAction)buttonClickedForNotes:(id) sender
{
    NSLog(@"buttion action call");

}

【问题讨论】：

看这个问题，应该是你的问题stackoverflow.com/questions/4825199/…

标签： iphone objective-c uigesturerecognizer uitapgesturerecognizer

【解决方案1】：

首先，订阅 UITapGesture 的委托。

[singleTapGestureRecognizer setDelegate:self];

然后你必须让按钮成为你所在的任何类的 ivar。然后，将此方法添加到您的类中：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    // Check if the touch was on the button. If it was,
    // don't have the gesture recognizer intercept the touch
    if (CGRectContainsPoint(notesButton.frame, [touch locationInView:self.view]))
        return NO;
    return YES;       
}

希望这会有所帮助。

【讨论】：

【解决方案2】：

默认情况下，UIView 无法响应用户事件。

在初始化ButtonView之后使用这段代码来启用它的userInteraction：

ButtionView.userInteractionEnabled = YES;

【讨论】：

【解决方案3】：

没有改变任何重要的东西。但是想追加你的按钮操作方法将在 UITapGestureRecognizer 方法被调用之后被调用。

ButtionView=[[UIView alloc]initWithFrame:CGRectMake(x, y, 84, 84)];
ButtionView.tag=i;
UIImageView *coverImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,ButtionView.frame.size.width,84)];
coverImageView.tag = i;

UIButton *notesbutton=[UIButton buttonWithType:UIButtonTypeRoundedRect];
notesbutton.frame=CGRectMake(0, 0,40,40);
notesbutton.tag=i;

[notesbutton addTarget:self action:@selector(buttonClickedForNotes:) forControlEvents:UIControlEventTouchUpInside];
[ButtionView addSubview:coverImageView];
[ButtionView addSubview:notesbutton];
[notesbutton bringSubviewToFront:ButtionView];
[self.view addSubview:ButtionView];
//[ButtionView addGestureRecognizer:oneFingerSingleTap];

UITapGestureRecognizer *singleTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self 
                                                                                         action:@selector(singleTap:)];
singleTapGestureRecognizer.numberOfTapsRequired = 1;
singleTapGestureRecognizer.enabled = YES;
singleTapGestureRecognizer.cancelsTouchesInView = NO;
[ButtionView addGestureRecognizer:singleTapGestureRecognizer];
[singleTapGestureRecognizer release];
}

- (void)singleTap:(UITapGestureRecognizer *)gesture{
    NSLog(@"handle taps");
}

-(IBAction)buttonClickedForNotes:(id)sender{
    NSLog(@"buttion action call");
}

【讨论】：