問題描述
現在我想在我的 iOS 應用中的地圖上添加靜態圖釘注釋.
Now I want to add a static pin annotation on map in my iOS app.
但我只想知道是否會調用委托方法 mapView:viewForAnnotation:.
But I just want to know if the delegate method mapView:viewForAnnotation: will be called.
在Apple文檔中，據說
In the Apple documentation, it is said that
When it needs an annotation view, the map view calls the mapView:viewForAnnotation: method of its delegate object.
我已經閱讀了一些來自 Internet 的教程和來自 Apple 的官方文檔.而且我仍然不知道何時調用此方法.
I have read several tutorials from Internet and official documentation from Apple. And I still don't when this method will be called.
推薦答案
每當你調用 addAnnotation 方法 - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation >)annotation 被調用.看看截圖吧.
Whenever you call addAnnotation method - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id < MKAnnotation >)annotation gets called. Have look at the screenshot.
您可以在 MKMapView 類參考
You can find this on MKMapView Class Reference
附:在 addAnnotation 調用和 - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id < MKAnnotation >)annotation 處放置斷點，您將看到函數的流程輕松調用.
P.S. Put breakpoints at addAnnotation call and - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id < MKAnnotation >)annotation you will see the flow of function call easily.
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