缩放以适合当前位置和地图上的注释 [英] Zoom to fit current location and annotation on map

问题描述

我不熟悉Swift(通常是iOS编程)，正在尝试弄清楚如何缩小地图以适合地图上的2个点.

I am new to swift (iOS programming in general) and am trying to figure out how to zoom a map out to fit 2 points on the map.

当前我有

var zoomRect = MKMapRectNull;
var myLocationPointRect = MKMapRectMake(myLocation.longitude, myLocation.latitude, 0, 0)
var currentDestinationPointRect = MKMapRectMake(currentDestination.longitude, currentDestination.latitude, 0, 0)

zoomRect = myLocationPointRect;
zoomRect = MKMapRectUnion(zoomRect, currentDestinationPointRect);

什么都不做.

我是否必须以某种方式将zoomRect应用于地图?

Do I have to apply zoomRect to the map somehow?

推荐答案

MKMapRectUnion计算并返回一个新的rect，仅此而已.您需要告诉mapView将其可见区域设置为该新矩形:

MKMapRectUnion computes and returns a new rect, nothing more. You need to tell the mapView to set its visible area to that new rect:

myMapView.setVisibleMapRect(zoomRect, animated: true)

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