计算mkmapkit的可见rect中的pinnumber-countthepinnumberinvisiblerectofmkmapkit

6  

The MKMapView annotationsInMapRect: method will give you the set of annotations in a given map rect.

MKMapView annotationsInMapRect:方法将为您提供给定map rect中的注释集。

To get the ones currently visible, pass it the map view's visibleMapRect property.

要获取当前可见的那些,请将地图视图的visibleMapRect属性传递给它。

To detect what annotations are visible after a zoom in, zoom out, or pan, call that method in the regionDidChangeAnimated delegate method:

要在放大,缩小或平移后检测注释是可见的,请在regionDidChangeAnimated委托方法中调用该方法:

-(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
{
    NSSet *annSet = [mapView annotationsInMapRect:mapView.visibleMapRect];
    NSLog(@"regionDidChangeAnimated: annSet count = %d", annSet.count);
}

0  

No. of pin can be counted by the following delegate method

引脚数可以通过以下代表方法计算

-(MKAnnotationView *)mapView:(MKMapView *)mapView1 viewForAnnotation:(id )annotation

- (MKAnnotationView *)mapView:(MKMapView *)mapView1 viewForAnnotation:(id)annotation

{

Count ++ NSLog(@"Count : %d", count);

Count ++ NSLog(@“Count:%d”,count);

}

0  

Assuming you have a ViewController with mapView as a subview.

假设您有一个带有mapView的ViewController作为子视图。

- (void)someMethod
{
    NSArray *visibleAnnotatiOns= [[self.mapView annotationsInMapRect:self.mapView.visibleMapRect] allObjects];
    NSUInteger VisibleAnnotatiOnCounts= visibleAnnotations.count;
...
}

You can also add to a proper MKMapView Delegate Method

您还可以添加适当的MKMapView委托方法

{
...
    NSArray *visibleAnnotatiOns= [[mapView annotationsInMapRect:mapView.visibleMapRect] allObjects];
    NSUInteger VisibleAnnotatiOnCounts= visibleAnnotations.count;
...
}