Question

我有一个mapkit应用程序在地图上放置注释，当你按下它们时，它会显示带有title属性的标注。

这很好用，但用户无法关闭它们。他们保持开放，直到他们点击另一个注释。我不能认为用户可以在地图上点击其他地方（或再次点击注释）关闭它吗？

我有一种感觉这是默认设置，所以我正在做的事情就是填充它？我有一个手势识别器，我用它来检测一些地图点击

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]
                                            initWithTarget:self action:@selector(handleTap:)];
tap.numberOfTapsRequired = 1;

[self.mapView addGestureRecognizer: tap];

引发了这个：

- (void)handleTap:(UITapGestureRecognizer *)sender {     
if (sender.state == UIGestureRecognizerStateEnded)  {   


    CGPoint tapPoint = [sender locationInView:sender.view.superview];
    CLLocationCoordinate2D coordinate = [self.mapView convertPoint: tapPoint toCoordinateFromView: self.mapView];

    if (pitStopMode && !pitStopMade){
            pitStopMade = YES;
        InfoAnnotation *annotation = [[InfoAnnotation alloc]
                       initNewPitstopWithCoordinate:coordinate];
        NSLog(@" Created Pit Stop");

        annotation.draggable = NO;
        //place it on the map
        [self.mapView addAnnotation: annotation];

        self.instructionLabel.text = @"Tap button again to remove";
        annotation.creatorId = self.localUser.deviceId;
        //send it to the server
        [annotation updateLocationWithServerForConvoy: self.convoyCode];        

        [annotation release];

    }  

    if (hazardMode && !hazardMade){
            hazardMade = YES;
        InfoAnnotation *annotation  = [[InfoAnnotation alloc]
                       initNewHazardWithCoordinate:coordinate];         
        NSLog(@" Created Hazard");

        annotation.draggable = NO;
        //place it on the map
        [self.mapView addAnnotation: annotation];

        self.instructionLabel.text = @"Tap button again to remove";
        annotation.creatorId = self.localUser.deviceId;
        //send it to the server
        [annotation updateLocationWithServerForConvoy: self.convoyCode];        

        [annotation release];


    }
}

}

我还需要做些什么来让这些水龙头进入mapview吗？拖动和点击注释工作正常，但我不确定这是否是导致它的原因？

有一个我缺少的选项，还是我必须尝试手动实现？

Answer 1

您可以实施UIGestureRecognizerDelegate方法gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:并返回YES（因此地图视图自己的点击手势识别器也会执行其方法）。

首先，将协议声明添加到视图控制器的界面（以避免编译器警告）：

@interface MyViewController : UIViewController <UIGestureRecognizerDelegate>

接下来，在手势识别器上设置delegate属性：

tap.delegate = self;

最后，实施方法：

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

如果由于某种原因无效，您可以在handleTap:方法的顶部手动取消选择任何当前选定的注释：

for (id<MKAnnotation> ann in mapView.selectedAnnotations) {
    [mapView deselectAnnotation:ann animated:NO];
}

即使地图视图一次只允许选择一个注释，selectedAnnotations属性也是NSArray，所以我们遍历它。

Answer 2

安娜解释得很好。我也想用准确的代码来解释。你可以这样做

     UITapGestureRecognizer *tapMap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(closeCallout:)];
      [self.mapView addGestureRecognizer:tapMap];

-(void) closeCallout:(UIGestureRecognizer*) recognizer 
        {
           for (id<MKAnnotation> ann in mapView.selectedAnnotations) 
           {
               [mapView deselectAnnotation:ann animated:NO];
           }      


        }

ios mapkit通过点击地图来关闭注释标注

2 个答案: