手机网站定制 杭州/成免费crm软件有哪些优点

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MapCallouts例子。