MKMAPVIEW上长按屏幕，添加大头针

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;

}

 

4、实现showDetails方法：

- (void)showDetails:(UIButton*)sender { }

关于MKMapView的更多请参加apple的