Question

任何人都知道是否有办法从添加到button的{{1}}获取点击事件，此MKAnnotationView用作标签，仅显示每个针脚的名称button，现在我在点击map时成功显示自定义view（包含图片，文字......），所以我需要在按钮时执行相同的操作（标签）被点击。

感谢您提供任何建议。

pin中button的代码：

MKAnnotationView

Answer 1

标准UI方法是使用标注视图并在progrmr显示时添加附件按钮。

但是，如果您必须直接向MKAnnotationView添加按钮，那么您的方法存在的问题是MKPinAnnotationView的默认框架（无法轻易更改）小于您添加的按钮，因此大多数按钮都不会响应触摸，即使您切换到使用MKAnnotationView并增加帧大小，MKMapView也会阻止按钮进行任何触摸。< / p>

您需要做的是在按钮上添加UITapGestureRecognizer（使用手势处理程序的操作方法而不是按钮上的addTarget）并将按钮添加到普通MKAnnotationView适当的帧大小而不是MKPinAnnotationView。

示例：

- (MKAnnotationView *)mapView:(MKMapView *)mapView 
        viewForAnnotation:(id<MKAnnotation>)annotation
{
    MKAnnotationView *annView = (MKAnnotationView *)[mapView 
            dequeueReusableAnnotationViewWithIdentifier: @"pin"];
    if (annView == nil)
    {
        annView = [[[MKAnnotationView alloc] initWithAnnotation:annotation 
                      reuseIdentifier:@"pin"] autorelease];

        annView.frame = CGRectMake(0, 0, 200, 50);

        UIButton *pinButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        pinButton.frame = CGRectMake(0, 0, 140, 28);
        pinButton.tag = 10;

        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] 
            initWithTarget:self action:@selector(handlePinButtonTap:)];
        tap.numberOfTapsRequired = 1;
        [pinButton addGestureRecognizer:tap];
        [tap release];

        [annView addSubview:pinButton]; 
    }

    annView.annotation = annotation;

    UIButton *pb = (UIButton *)[annView viewWithTag:10];
    [pb setTitle:annotation.title forState:UIControlStateNormal];

    return annView;
}

- (void) handlePinButtonTap:(UITapGestureRecognizer *)gestureRecognizer 
{
    UIButton *btn = (UIButton *) gestureRecognizer.view;
    MKAnnotationView *av = (MKAnnotationView *)[btn superview];
    id<MKAnnotation> ann = av.annotation;
    NSLog(@"handlePinButtonTap: ann.title=%@", ann.title);
}

请注意，这将阻止映射视图的didSelectAnnotationView委托方法触发。如果您需要触发该方法（在添加到按钮的手势处理程序方法中），则添加以下内容：

//in the view controller's interface:
@interface YourVC : UIViewController <UIGestureRecognizerDelegate>

//where the UITapGestureRecognizer is created:
tap.delegate = self;

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer 
        shouldRecognizeSimultaneouslyWithGestureRecognizer
            :(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

Answer 2

我使用此代码在标注视图（在我的应用中）添加了一个按钮（为了清晰起见，已减少）：

-(MKAnnotationView *)mapView:(MKMapView *)map 
        viewForAnnotation:(StationItem*)annotation
{
    static NSString *AnnotationViewID = @"stationViewId";

    if ([annotation isKindOfClass:[MKUserLocation class]]) {
        return nil;  // use default user location view
    }

    MKPinAnnotationView *annotationView = 
        (MKPinAnnotationView*) [mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];

    if (annotationView == nil) {
        // if an existing pin view was not available, create one
        annotationView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];

        // add rightAccessoryView
        UIButton* aButton = [UIButton buttonWithFrame:CGRectMake(0, 0, 75, 30)];
        [aButton setTitle:@"Directions" forState:UIControlStateNormal];
        annotationView.rightCalloutAccessoryView = aButton;
    }

    annotationView.annotation = annotation;
    annotationView.canShowCallout = YES;
    annotationView.animatesDrop   = NO;

    return annotationView;
}

执行此操作后，您需要实现MKMapViewDelegate以在点击按钮时处理对委托的回调：

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control

Answer 3

尝试将触摸传递给子视图：

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
 [pinButton touchesEnded:touches withEvent:event];
}

如果你的buttonView在前面，我很惊讶你有问题吗？尝试确保它是： [self bringSubviewToFront：pinButton];

如何从通过MKAnnotationView添加的按钮获取单击事件

3 个答案: