ios - 如何访问 MKAnnotation 的特定索引
<p><p>我有一个使用 MKAnnotations 填充标记的 mapView。我能够很好地获得注释数组。但是,我如何找出被点击的标记的索引?假设我点击了一个标记并弹出了 MKAnnotation。如何获取此注解实例?</p>
<p>ViewDidAppear 代码:</p>
<pre><code> for (var i=0; i<latArray.count; i++) {
let individualAnnotation = Annotations(title: addressArray,
coordinate: CLLocationCoordinate2D(latitude: latArray, longitude: longArray))
mapView.addAnnotation(individualAnnotation)
}
//store annotations into a variable
var annotationArray = self.mapView.annotations
//prints out an current annotations in array
//Result:[<AppName.Annotations: 0x185535a0>, <AppName.Annotations: 0x1663a5c0>, <AppName.Annotations: 0x18575fa0>, <AppName.Annotations: 0x185533a0>, <AppName.Annotations: 0x18553800>]
println(annotationArray)
</code></pre>
<p>注解类:
导入 MapKit</p>
<pre><code>class Annotations: NSObject, MKAnnotation {
let title: String
//let locationName: String
//let discipline: String
let coordinate: CLLocationCoordinate2D
init(title: String, coordinate: CLLocationCoordinate2D) {
self.title = title
self.coordinate = coordinate
super.init()
}
var subtitle: String {
return title
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>MKMapViewDelegate 提供了一个委托(delegate)方法<a href="https://developer.apple.com/library/ios/documentation/MapKit/Reference/MKMapViewDelegate_Protocol/#//apple_ref/occ/intfm/MKMapViewDelegate/mapView:annotationView:calloutAccessoryControlTapped:" rel="noreferrer noopener nofollow">mapView:annotationView:calloutAccessoryControlTapped:</a>实现此方法为您提供了您正在寻找的 MKAnnotation 实例的 MKAnnotationView。您可以调用 MKAnnotationView 的 <a href="https://developer.apple.com/library/mac/documentation/MapKit/Reference/MKAnnotationView_Class/#//apple_ref/occ/instp/MKAnnotationView/annotation" rel="noreferrer noopener nofollow">annotation</a>属性来获取 MKAnnotation 的相应实例。 </p>
<pre><code>import UIKit
import MapKit
class ViewController: UIViewController, MKMapViewDelegate {
@IBOutlet weak var mapView: MKMapView!
var sortedAnnotationArray: = [] //create your array of annotations.
//your ViewDidAppear now looks like:
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
for (var i = 0; i < latArray.count; i++) {
let individualAnnotation = Annotations(title: addressArray, coordinate: CLLocationCoordinate2D(latitude: latArray, longitude: longArray))
mapView.addAnnotation(individualAnnotation)
//append the newly added annotation to the array
sortedAnnotationArray.append(individualAnnotation)
}
}
func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
let theAnnotation = view.annotation
for (index, value) in enumerate(sortedAnnotationArray) {
if value === theAnnotation {
println("The annotation's array index is \(index)")
}
}
}
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - 如何访问 MKAnnotation 的特定索引,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/31496766/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/31496766/
</a>
</p>
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