如何重新定位MKMapView的指南针?

iOS 11

MKCompassButton ,博士解释新材料: WWDC 2017 new MapKit presentation .

let compassButton = MKCompassButton(mapView:mapView)
compassButton.frame.origin = CGPoint(x: 20, y: 20)
compassButton.compassVisibility = .visible
view.addSubview(compassButton)

iOS<11

您可以尝试使用 String(describing:) ,类似于:

if let compassButton = (mapView.subviews.filter { String(describing:$0).contains("MKCompassView") }.first) {
   print(compassButton)
}

对于iOS 11及以上版本,请使用 MKCompassButton .

let compass = MKCompassButton(mapView: mapView)

这是我通过子类化MKMapView来重新定位指南针视图的解决方案。
代码是在iOS10及以上版本上测试的Swift 5.0。
注意:在iOS10设备上测试时,必须旋转地图才能使指南针可见。

import MapKit
class MapView: MKMapView {
    override func layoutSubviews() {
        super.layoutSubviews()
        if #available(iOS 10.0, *) {
            self.showsCompass = true //*** - You have to set this true here, it does not work if you set it on storyboards or in a View Controller - ***
            if let compassButton = (self.subviews.filter { String(describing:$0).contains("MKCompassView") }.first) {
                compassButton.frame = CGRect(x: 20, y: 40, width: 36, height: 36)
            }
        } else {
            let compassButton = MKCompassButton(mapView:self)
            compassButton.frame.origin = CGPoint(x: 20, y: 40)
            compassButton.compassVisibility = .visible
            self.addSubview(compassButton)
        }
    }
}