如何在 swift 2 (xcode) 中使用 mapkit 放大某个位置

Question

我试图在用户输入地址时放大地图上的一个点，例如，一个无限循环。我想让它放大到街道级别的位置，但我不能为了上帝的爱让它放大。我试过弄乱区域、跨度等，但没有运气。这是我的代码的样子（我在视图中没有加载函数）...你会看到我已经注释掉了一些代码，因为我试过了但没有任何反应。 my code and here is what the output is on the simulator the output on simulator

Answer 1

为什么在geocodeAddressString闭包中定义func？

下面的代码怎么样？

    geocoder.geocodeAddressString(address, completionHandler: {(placemarks, error) -> Void in
        if (error != nil) {
            print("Error", error)
        }

        if let placemark = placemarks?.first {
            let span = MKCoordinateSpan(latitudeDelta: 0.0001, longitudeDelta: 0.0001)
            let coordinate = placemark.location!.coordinate
            let region = MKCoordinateRegion(center: coordinate, span: span)
            self.mapView.setRegion(region, animated: true)
        }
    })

结果：

Answer 2

Use var for span and region rather than let.

You need to get rid of the self in front of Map.setRegion

Also try a bigger number for the span coordinates something like 0.4 or 0.5 or you could still use 0.0001 that doesn't really matter.

span = MKCoordinateSpanMake(0.4,0.4)

var region = MKCoordinateRegion(center: **location variable goes in here** , span = span ) 
Map.setRegion(region, animated: true)

如何在 swift 2 (xcode) 中使用 mapkit 放大某个位置

How do I zoom in on a location using mapkit in swift 2 (xcode)

xcode

location

mapkit

swift

ios9