在swift中长按时将引脚注释添加到地图视图中 [英] Adding a pin annotation to a map view on a long press in swift

问题描述

我正在尝试制作一款iPhone应用程序，要求用户能够长时间按下地图视图上的某个地方，以便在那里放置别针。有人知道这是怎么做的吗？

I'm trying to make an iPhone app which requires users to be able to long press on a place on a map view to drop a pin there. Does anybody know how this is done?

当你长按屏幕时，可以在苹果地图中观察到这种行为。它将删除一个引脚并提供一个注释，说drop pin

The behaviour is observable in apple maps when you long press on the screen. It will drop a pin and present an annotation saying "dropped pin"

推荐答案

1）实例化一个 UILongPressGestureRecognizer 并将其添加到 MKMapView 。

1) Instantiate a UILongPressGestureRecognizer and add it to the MKMapView.

2）当用户长按后调用选择器时，在 MKMapView <中调用 addAnnotation方法 / code>具有适当的标题和坐标。

2) When the selector gets called after the user has a long press, call the addAnnotation method in MKMapView with the appropriate title and coordinate.

3）然后确保符合 MKMapViewDelegate 并实现 viewForAnnotation：将在您添加注释后立即调用并返回 MKPinAnnotationView

3) Then make sure you conform to the MKMapViewDelegate and implement viewForAnnotation: which will be called right after you add the annotation and return a MKPinAnnotationView

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