IOS MapKit 输入城市名获取经纬度显示地图

最近接触到iOS 的mapkit,大概弄了一下，初学者，第一篇博客，还请各位多多指点。


下面是简单的实现，希望对各位有帮助

首先是storyboard



右边蓝色view继承MKMapView。

具体实现：

ViewController.swift

import UIKit
import MapKit
class ViewController:
UIViewController {

var mapData:CLLocationCoordinate2D =
CLLocationCoordinate2D(latitude: 0, longitude:
0)

@IBOutlet weak
var textSearch: UITextField!

@IBAction func submitClicked(sender:
UIButton) {

mapData=MapHelper.geoCodeUsingAddress(textSearch.text)

self.performSegueWithIdentifier("showMap", sender:
self)
}

override func viewDidLoad() {

super.viewDidLoad()


}


override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.
}

//界面跳转传值

override func prepareForSegue(segue:
UIStoryboardSegue, sender:
AnyObject?) {



if segue.identifier ==
"showMap" {

if let a = segue.destinationViewController
as? mapKitViewController {
a.city=textSearch.text

a.latitude=mapData.latitude

a.longitude=mapData.longitude
}
}
}


}

mapKitViewController.swift放置地图的界面

import UIKit
import MapKit

class mapKitViewController:
UIViewController , MKMapViewDelegate{

var city=String()

var latitude=Double()

var longitude=Double()

@IBOutlet var mapview:
MKMapView!

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view.

let location=CLLocationCoordinate2D(latitude:
latitude, longitude:
longitude)

let span=MKCoordinateSpanMake(1,
1) //可以改变地图显示的比例

let region=MKCoordinateRegion(center: location, span: span)

mapview.setRegion(region, animated:
true)



let annotation = MKPointAnnotation()
annotation.coordinate=location
annotation.title=city
annotation.subtitle="China"

mapview.addAnnotation(annotation)
}


override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.
}
}

MapHelper.swift 根据城市明获取城市经纬度

import Foundation
import MapKit

class MapHelper{



static func geoCodeUsingAddress(address:String) ->CLLocationCoordinate2D{

var latitude = 0.0

var longitude = 0.0

let esc_addr = address

let req =
"http://maps.google.cn/maps/api/geocode/json?sensor=false&address=\(address)"

let result:NSString? =
NSString(contentsOfURL:
NSURL(string: req)!, encoding: NSUTF8StringEncoding, error:
nil)

if let value=result{

let scanner:NSScanner =
NSScanner(string: value
as String)

if(scanner.scanUpToString("\"location\" :", intoString:
nil) && scanner.scanString("\"location\" :", intoString:
nil)){

if(scanner.scanUpToString("\"lat\" :", intoString:
nil) && scanner.scanString("\"lat\" :", intoString:
nil)){
scanner.scanDouble(&latitude)
}

if(scanner.scanUpToString("\"lng\" :", intoString:
nil) && scanner.scanString("\"lng\" :", intoString:
nil)){
scanner.scanDouble(&longitude)
}
}
}

var center:CLLocationCoordinate2D =
CLLocationCoordinate2D(latitude:
0, longitude: 0);
center.latitude = latitude;
center.longitude = longitude;

return center;
}
}
运行结果：





就这么多，希望能够给小伙伴们有帮助，写的不好以后继续努力