UIBarButtonItem和UIGestureRecognizer

Question

我有一个在其中添加了UITapGestureRecognizer的UIView

UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDetected:)];
tapRecognizer.numberOfTapsRequired=1;
tapRecognizer.numberOfTouchesRequired=1;
[self.myView addGestureRecognizer:tapRecognizer];

然后，我将一个带有按钮的UIToolBar添加到视图中：

UIToolbar *topBar = [[UIToolbar alloc ]initWithFrame:CGRectMake(0, 0, self.myView.frame.size.width, 44)];
topBar.barStyle = UIBarStyleBlackTranslucent;

UIBarButtonItem *logout = [[UIBarButtonItem alloc] initWithTitle:@"Logout" style:UIBarButtonItemStyleBordered target:self action:@selector(logout)];

[topBar setItems:@[logout] animated:NO];

我有一个问题，当我点击注销按钮，我的点击识别器触发，而不是我的注销操作。如果我点击并按住，那么注销操作就会触发(我猜是点击识别器失败了，所以让按钮操作触发)。

当按钮被按下时，我如何不触发手势识别器？

Answer 1

只是遇到了同样的问题。因为我不想引入容器视图( UIToolbar应该覆盖我现有的视图)。在Patrick.Ji粗略地指出的帮助下，我想出了这个：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    if ([touch.view.superview isKindOfClass:[UIToolbar class]]) {
        return NO;
    }
    return YES;
}

不要忘记将手势的委托设置为self

- (void)viewDidLoad {
    [super viewDidLoad];
    UITapGestureRecognizer *mainTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(mainTapGesture:)];
    mainTapGestureRecognizer.delegate = self;
    [self.view addGestureRecognizer:mainTapGestureRecognizer];
}

Answer 2

检查点击识别器中的视图。如果是您的注销按钮，让触摸无法通过super将其传递到链上。

或者，确保工具栏不是视图的子视图。相反，让容器视图包含工具栏和内容视图，并将手势识别器添加到此内容视图中。

Answer 3

实现UIGestureRecognizer的这个委托方法(记得设置tapRecognizer.delegate = self)

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:   (UITouch *)touch {

    if ([touch.view isKindOfClass:[UIBarButtonItem class]]) 
    {
        return NO;
    }
    return YES;
}