使用swift在iOS地图中的最大缩放级别

Question

我不希望用户缩小更多.有没有办法在Map kit使用swift时设置最大缩放级别？

Answer 1

请检查这是否符合您的条件.

import Foundation
import MapKit

class MapViewWithZoom: MKMapView {

    var zoomLevel: Int {
        get {
            return Int(log2(360 * (Double(self.frame.size.width/256) / self.region.span.longitudeDelta)) + 1);
        }

        set (newZoomLevel){
            setCenterCoordinate(self.centerCoordinate, zoomLevel: newZoomLevel, animated: false)
        }
    }

    private func setCenterCoordinate(coordinate: CLLocationCoordinate2D, zoomLevel: Int, animated: Bool){
        let span = MKCoordinateSpanMake(0, 360 / pow(2, Double(zoomLevel)) * Double(self.frame.size.width) / 256)
        setRegion(MKCoordinateRegionMake(centerCoordinate, span), animated: animated)
    }
}