在这种情况下该图形页面：viewForAnnotation：会叫什么名字？ [英] In which case that mapView:viewForAnnotation: will be called?

问题描述

现在我想添加地图的静态销标注在我的iOS应用程序。

Now I want to add a static pin annotation on map in my iOS app.

但我只是想知道，如果委托方法的MapView：viewForAnnotation：将被称为

But I just want to know if the delegate method mapView:viewForAnnotation: will be called.

在苹果的文档，它是说，

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. 

我已经阅读从苹果互联网和官方文件的几个教程。
我仍然没有当这个方法会被调用。

I have read several tutorials from Internet and official documentation from Apple. And I still don't when this method will be called.

推荐答案

当你调用 addAnnotation 方法 - （MKAnnotationView *）的MapView：（的MKMapView *）的MapView viewForAnnotation：（ID＆LT; MKAnnotation＆GT;）注释被调用。已经看截图。

Whenever you call addAnnotation method - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id < MKAnnotation >)annotation gets called. Have look at the screenshot.

您可以找到这个在 MKMapView类参考

You can find this on MKMapView Class Reference

P.S。把断点在 addAnnotation 通话和 - （MKAnnotationView *）的MapView：（的MKMapView *）的MapView viewForAnnotation：（ID＆LT; MKAnnotation＆GT;）注释，你会很容易地看到函数调用的流程。

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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