MapKit点击地图获得改点的经纬度,并标大头针!


首先在viewdidload里增加地图的一个触摸事件

UITapGestureRecognizer *mTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapPress:)];
    [self.mapView addGestureRecognizer:mTap];
    [mTap release];

事件实现如下:

- (void)tapPress:(UIGestureRecognizer*)gestureRecognizer {
    
    CGPoint touchPoint = [gestureRecognizer locationInView:self.mapView];//这里touchPoint是点击的某点在地图控件中的位置
    CLLocationCoordinate2D touchMapCoordinate =
    [self.mapView convertPoint:touchPoint toCoordinateFromView:self.mapView];//这里touchMapCoordinate就是该点的经纬度了
    
    NSLog(@"touching %f,%f",touchMapCoordinate.latitude,touchMapCoordinate.longitude);
    if (annotationa) {
        
        [self.mapView   removeAnnotation:annotationa];
       
    }
    annotationa =[[[DisplayMap alloc]  initWithCoordinate:touchMapCoordinate]  autorelease];  
    
    
    [self.mapView   addAnnotation:annotationa];
    
  
  
    
}

annotationa自己定义去吧,DisplayMap是我自己定的
在实际的应用中,标准类往往不能够满足实际的需要,编写自定义类的能力往往异常的突出,在满足项目需求的同时又要兼顾稳定性,需要对每个类的深层次进行了解,以便定制。

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