我正在创建一个地图应用程序,它允许将emojis附加到位置。目前,图像显示在股票苹果地图注释上方。
我希望隐藏库存图片图像,同时仍然显示用户选择的表情符号。这可能吗?
到目前为止我有这个代码来执行此操作:
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
//let identifier = "MyPin"
if annotation.isKindOfClass(MKUserLocation) {
return nil
}
let dictName = arrLocation[((annotation as? MyAnnotation)?.index)!]
let imgName = dictName.valueForKey("pin_img") as? String
var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(imgName!)
if annotationView == nil
{
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: imgName)
annotationView!.canShowCallout = false
let name = dictName.valueForKey("name") as! String
let annot = MyAnnotation(titleName:name)
annotationView?.annotation = annot
}
else
{
annotationView!.annotation = annotation
}
let detailButton: UIButton = UIButton(type: UIButtonType.Custom)
// size and placement of emoji on map
detailButton.frame = CGRectMake(-34,-25,85,85)
detailButton.tag = ((annotation as? MyAnnotation)?.index)!
detailButton.addTarget(self, action:"emojiTap:", forControlEvents: UIControlEvents.TouchUpInside)
detailButton.setBackgroundImage(UIImage(named:(dictName.valueForKey("pin_img") as? String)!), forState: UIControlState.Normal)
annotationView!.addSubview(detailButton)
return annotationView
}
答案 0 :(得分:0)
不使用MKPinAnnotationView,而是使用其超类MKAnnotationView。
要响应用户点击注释,请执行mapView:didSelectAnnotation:委托方法。点击注释时会调用此委托方法。
请注意,您无需使用注释视图中的按钮。这意味着emojiTap:
中的功能必须由mapView:didSelectAnnotationMethod:
实现。
结合这些
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if annotation.isKindOfClass(MKUserLocation) {
return nil
}
let dictName = arrLocation[((annotation as? MyAnnotation)?.index)!]
let imgName = dictName.valueForKey("pin_img") as? String
var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(imgName!)
if annotationView == nil
{
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: imgName)
let name = dictName.valueForKey("name") as! String
let annot = MyAnnotation(titleName:name)
annotationView?.annotation = annot
}
else
{
annotationView!.annotation = annotation
}
annotationView!.canShowCallout = false
return annotationView
}
func mapView(_ mapView: MKMapView, didSelectAnnotationView view: MKAnnotationView) {
guard let annotation = view.annotation as? MyAnnotation else {
return
}
print("tapped annotation: \(annotation.index)
// Implement the code from emojiTap: here.
}