本文介绍了MKViewMap自定义注释在单击时消失的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在为MKMap创建自定义注释.是可行的,但是当我单击注释时,注释消失(参见图片),然后标注显示也消失.
I'm creating custom annotation for MKMap. It's work, but when I click on an annotation, the annotation disappears (see image), then the callout show and disappears too.
(我已经完成了本教程 https://www.raywenderlich.com /90971/introduction-mapkit-swift-tutorial )
(I have done this tutorial https://www.raywenderlich.com/90971/introduction-mapkit-swift-tutorial)
此处是自定义注释:
class Trail: NSObject, MKAnnotation {
let title: String?
let difficulty: String
let coordinate: CLLocationCoordinate2D
var enableInfoButton : Bool
init(title: String, difficulty: String, coordinate: CLLocationCoordinate2D, enableInfoButton : Bool) {
self.title = title
self.difficulty = difficulty
self.coordinate = coordinate
self.enableInfoButton = enableInfoButton;
super.init()
}
var subtitle: String? {
return title
}
func annotationView() -> MKAnnotationView {
let view = MKAnnotationView(annotation: self, reuseIdentifier: "trailPin")
view.translatesAutoresizingMaskIntoConstraints = false
view.enabled = true
view.canShowCallout = true
view.rightCalloutAccessoryView = UIButton(type: UIButtonType.Custom)
view.centerOffset = CGPointMake(0, -32)
if(difficulty == Difficulty.HARD){
view.image = UIImage(named: "ic_map_poi_trail_hard")
}
else if(difficulty == Difficulty.AVERAGE){
view.image = UIImage(named: "ic_map_poi_trail_average")
}
else if(difficulty == Difficulty.EASY){
view.image = UIImage(named: "ic_map_poi_trail_easy")
}
return view
}
func infoClicked(sender: AnyObject?) {
print("infoClicked")
}
}
并在视图控制器中:
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if (annotation.isKindOfClass(Trail)) {
let customAnnotation = annotation as? Trail
mapView.translatesAutoresizingMaskIntoConstraints = false
var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier("trailPin") as MKAnnotationView!
if (annotationView == nil) {
annotationView = customAnnotation?.annotationView()
} else {
annotationView.annotation = annotation;
}
return annotationView
} else {
let reuseId = "trailPin"
var anView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId)
if anView == nil {
anView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
anView!.image = UIImage(named:"map")
anView!.canShowCallout = true
}
else {
//we are re-using a view, update its annotation reference...
anView!.annotation = annotation
}
return anView
}
}
推荐答案
我自己找到了解决方案,这是一行:
I found the solution myself, this was the line :
view.translatesAutoresizingMaskIntoConstraints = false
我删除了它,而且可以正常工作
I deleted it and it's work
这篇关于MKViewMap自定义注释在单击时消失的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!