MKMAPVIEW上长按屏幕，添加大头针-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_7030/article/details/82122860

在做地图有关的程序时，我们经常需要用户在地图上指定位置我们再用大头针标记。

1、在viewDidLoad中添加我们要捕获的手势：

 
     UILongPressGestureRecognizer *lpress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)]; 
 
     lpress.minimumPressDuration = 0.5;//按0.5秒响应longPress方法 
 
    lpress.allowableMovement = 10.0;
 
     [m_mapView addGestureRecognizer:lpress];//m_mapView是MKMapView的实例 
 
    [lpress release];

2、实现要响应的longPress方法:

 
     - (void)longPress:(UIGestureRecognizer*)gestureRecognizer{ 
 
         if (gestureRecognizer.state == UIGestureRecognizerStateEnded){ 
 
             return; 
 
         } 
 
         //坐标转换 
 
         CGPoint touchPoint = [gestureRecognizer locationInView:m_mapView]; 
 
         CLLocationCoordinate2D touchMapCoordinate = 
 
         [m_mapView convertPoint:touchPoint toCoordinateFromView:m_mapView]; 
 
         MKPointAnnotation*　pointAnnotation = nil; 
 
         pointAnnotation = [[MKPointAnnotation alloc] init]; 
 
         pointAnnotation.coordinate = touchMapCoordinate; 
 
         pointAnnotation.title = @"名字"; 
 
         [m_mapView addAnnotation:m_pointAnnotation]; 
 
         [pointAnnotation release]; 
 
    }

3，响应MKMapView的代理方法：

 
     - (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation{   
 
         if ([annotation isKindOfClass:[MKUserLocation class]]) 
 
         { 
 
             [self.navigationItem.rightBarButtonItem setEnabled:YES];//导航栏右边回到当前位置的按钮可用 
 
             return nil; 
 
         } 
 
         static NSString* AnnotationIdentifier = @"AnnotationIdentifier"; 
 
         MKPinAnnotationView* customPinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier]; 
 
         if (!customPinView) { 
 
             customPinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease]; 
 
             customPinView.pinColor = MKPinAnnotationColorRe;//设置大头针的颜色 
 
             customPinView.animatesDrop = YES; 
 
             customPinView.canShowCallout = YES; 
 
             customPinView.draggable = YES;//可以拖动 
 
             //添加tips上的按钮 
 
             UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
 
             [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside]; 
 
             customPinView.rightCalloutAccessoryView = rightButton; 
 
         }else{ 
 
             customPinView.annotation = annotation; 
 
         } 
 
         return customPinView; 
 
    }