MapKit缩放按钮
答
退房答案
switch sender.tag {
case 10:
//Zoom In
var region: MKCoordinateRegion = map_view.region
region.span.latitudeDelta /= 2.0
region.span.longitudeDelta /= 2.0
map_view.setRegion(region, animated: true)
case 20:
//Zoom Out
var region: MKCoordinateRegion = map_view.region
region.span.latitudeDelta = min(region.span.latitudeDelta * 2.0, 180.0)
region.span.longitudeDelta = min(region.span.longitudeDelta * 2.0, 180.0)
map_view.setRegion(region, animated: true)
}
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Thnx花花公子对我的问题简单而容易 – Saneth
答
这里是
let region = MKCoordinateRegionMake(self.mapView.region.center, MKCoordinateSpanMake(mapView.region.span.latitudeDelta*0.7, mapView.region.span.longitudeDelta*0.7))
mapView.setRegion(region, animated: true)
在迅速3
变焦答案变焦出
let zoom = getZoom() // to get the value of zoom of your map.
if zoom > 3.5{ // **here i have used the condition that avoid the mapview to zoom less then 3.5 to avoid crash.**
let region = MKCoordinateRegionMake(self.mapView.region.center, MKCoordinateSpanMake(mapView.region.span.latitudeDelta/0.7, mapView.region.span.longitudeDelta/0.7))
mapView.setRegion(region, animated: true)
}
在这里你可以得到多少的地图视野放大。
func getZoom() -> Double {
var angleCamera = self.mapView.camera.heading
if angleCamera > 270 {
angleCamera = 360 - angleCamera
} else if angleCamera > 90 {
angleCamera = fabs(angleCamera - 180)
}
let angleRad = Double.pi * angleCamera/180
let width = Double(self.view.frame.size.width)
let height = Double(self.view.frame.size.height)
let heightOffset : Double = 20
let spanStraight = width * self.mapView.region.span.longitudeDelta/(width * cos(angleRad) + (height - heightOffset) * sin(angleRad))
return log2(360 * ((width/256)/spanStraight)) + 1;
}
它适用于我。
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日Thnx花花公子它也能工作 – Saneth
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欢迎兄弟如果有的话,然后问我。 –
我有答案,但在目标C –