我是
Swift的新手.我正在尝试在特定引脚上使用不同颜色的引脚或自定义引脚.我的代码有效.我有一个紫色的针,但我希望它们之间有所区别.我该怎么做？我认为在MapView委托方法中有一些事情要做,但我没有找到它.
import UIKit
import MapKit
class MapsViewController: UIViewController,MKMapViewDelegate{
var shops: NSArray? {
didSet{
self.loadMaps()
}
}
@IBOutlet weak var map: MKMapView?
override func viewDidLoad() {
super.viewDidLoad()
loadMaps()
self.title = "Carte"
self.map!.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func mapView(mapView: MKMapView,viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
// simple and inefficient example
let annotationView = MKPinAnnotationView()
annotationView.pinTintColor = UIColor.purpleColor()
return annotationView
}
func loadMaps(){
// navigationController?.navigationBar.topItem!.title = "Carte"
let shopsArray = self.shops! as NSArray
for shop in shopsArray {
let location = CLLocationCoordinate2D(
latitude: shop["lat"] as! Double,longitude: shop["long"] as! Double
)
let annotation = MKPointAnnotation()
annotation.coordinate = location
annotation.title = shop["name"] as? String
annotation.subtitle = shop["addresse"] as? String
map?.addAnnotation(annotation)
}
// add point
}
/*
// MARK: - Navigation
// In a storyboard-based application,you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue,sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
解决方法
更好的方法是使用实现MKAnnotation协议的自定义注释类(一种简单的方法是子类化MKPointAnnotation)并添加帮助实现自定义逻辑所需的任何属性.
在自定义类中,添加一个属性,比如pinColor,您可以使用该属性来自定义注释的颜色.
此示例是MKPointAnnotation的子类：
import UIKit
import MapKit
class ColorPointAnnotation: MKPointAnnotation {
var pinColor: UIColor
init(pinColor: UIColor) {
self.pinColor = pinColor
super.init()
}
}
创建ColorPointAnnotation类型的注释并设置其pinColor：
let annotation = ColorPointAnnotation(pinColor: UIColor.blueColor()) annotation.coordinate = coordinate annotation.title = "title" annotation.subtitle = "subtitle" self.mapView.addAnnotation(annotation)
在viewForAnnotation中,使用pinColor属性设置视图的pinTintColor：
func mapView(mapView: MKMapView,viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKUserLocation {
return nil
}
let reuseId = "pin"
var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView
if pinView == nil {
pinView = MKPinAnnotationView(annotation: annotation,reuseIdentifier: reuseId)
let colorPointAnnotation = annotation as! ColorPointAnnotation
pinView?.pinTintColor = colorPointAnnotation.pinColor
}
else {
pinView?.annotation = annotation
}
return pinView
}
