Question

我正在尝试制作一个使用mapkit来显示自定义引脚的应用。其中一个要求是对引脚进行群集并显示群集引脚的数量。

问题在于我试图做到这一点很快，而且没有解决方案。我尝试了不同的库，我设法让它工作的唯一一个就是这个：

我能够添加注释，当我缩小时它们会聚集，但我无法更改它们的图片。这是我到目前为止所得到的：

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var myMap: REVClusterMapView!

    let regionRadius: CLLocationDistance = 1000

    override func viewDidLoad() {
        super.viewDidLoad()

        let initialLocation = CLLocation(latitude: 43.719880, longitude: -79.467060)
        centerMapOnLocation(initialLocation)

        var myAnn: NSMutableArray = NSMutableArray()

        let coordonate: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: 43.717880, longitude: -79.462060)

        var ann = CustomPointAnnotation()
        ann.coordinate = coordonate
        ann.title = "MyPin"
        ann.subtitle = "some text"
        ann.imageName = "restaurant_pin"

        myAnn.addObject(ann)

        myMap.addAnnotations(myAnn as [AnyObject])
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func centerMapOnLocation(location: CLLocation) {
        let coordinateRegion = MKCoordinateRegionMakeWithDistance(location.coordinate,
            regionRadius * 2.0, regionRadius * 2.0)
        myMap.setRegion(coordinateRegion, animated: true)
    }

    func myMap(myMap: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {

        println("delegate called")

        if !(annotation is CustomPointAnnotation) {
            return nil
        }

        let reuseId = "test"

        var anView = myMap.dequeueReusableAnnotationViewWithIdentifier(reuseId)
        if anView == nil {
            anView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
            anView.canShowCallout = true
        }
        else {
            anView.annotation = annotation
        }

        //Set annotation-specific properties **AFTER**
        //the view is dequeued or created...

        let cpa = annotation as! CustomPointAnnotation
        println(cpa.imageName)
        anView.image = UIImage(named: cpa.imageName)

        return anView
    }

    class CustomPointAnnotation: REVClusterPin {
        var imageName: String!
    }

}

在控制台中没有＆＃34;委托称为＆＃34;信息。如何让它调用它并且这个委托好吗？

在Objective-C中它看起来像这样：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    if([annotation class] == MKUserLocation.class) {
        //userLocation = annotation;
        return nil;
    }

    REVClusterPin *pin = (REVClusterPin *)annotation;

    MKAnnotationView *annView;

    if( [pin nodeCount] > 0 ){
        pin.title = @"___";

        annView = (REVClusterAnnotationView*)
        [mapView dequeueReusableAnnotationViewWithIdentifier:@"cluster"];

        if( !annView )
            annView = (REVClusterAnnotationView*)
            [[[REVClusterAnnotationView alloc] initWithAnnotation:annotation 
                                                  reuseIdentifier:@"cluster"] autorelease];

        annView.image = [UIImage imageNamed:@"cluster.png"];

        [(REVClusterAnnotationView*)annView setClusterText:
         [NSString stringWithFormat:@"%i",[pin nodeCount]]];

        annView.canShowCallout = NO;
    } else {
        annView = [mapView dequeueReusableAnnotationViewWithIdentifier:@"pin"];

        if( !annView )
            annView = [[[MKAnnotationView alloc] initWithAnnotation:annotation 
                                                    reuseIdentifier:@"pin"] autorelease];

        annView.image = [UIImage imageNamed:@"pinpoint.png"];
        annView.canShowCallout = YES;   

        annView.calloutOffset = CGPointMake(-6.0, 0.0);
    }
    return annView;
}

我很抱歉这个愚蠢的问题，但我已经挣扎了好几天找到一个工作的图书馆，现在我无法理解这一点。此外，我是IOS的新手，Objective-C对初学者来说是一门非常难的语言。

谢谢！

Swift：如何更改注释图像

0 个答案: