1.導入框架

<pre>

import <CoreLocation/CoreLocation.h>

</pre>

2.定義對象

<pre>
@property(nonatomic,strong)CLLocationManager *locationManager;
</pre>

3.開始定位

<pre>
//定位服務
-(void)LocationService
{

if ([CLLocationManager locationServicesEnabled]) {
    // 初始化定位管理器
    self.locationManager=[[CLLocationManager alloc]init];
    self.locationManager.delegate=self;
    // 設置定位精確度到千米
    self.locationManager.desiredAccuracy=kCLLocationAccuracyKilometer;
    // 設置過濾器為無
    self.locationManager.distanceFilter=kCLDistanceFilterNone;
    //這句話ios8以上版本使用
    [ self.locationManager requestAlwaysAuthorization];
    //開始定位
    [ self.locationManager startUpdatingLocation];
} else {
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"無法定位" message:@"請檢查你的設備是否開啟定位功能" delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];
    [alert show];
}

}
</pre>

4.代理方法

<pre>

pragma mark--定位代理

• (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
  {

  // 獲取當前所在的城市名
  CLGeocoder *geocoder = [[CLGeocoder alloc] init];
  //根據經緯度反向地理編譯出地址信息
  [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray*array, NSError *error){
  if (array.count > 0){
  CLPlacemark *placemark = [array objectAtIndex:0];

        //獲取城市
        NSString \*city = placemark.locality;
        if (!city) {
            //四大直轄市的城市信息無法通過locality獲得，只能通過獲取省份的方法來獲得（如果city為空，則可知為直轄市）
            city = placemark.administrativeArea;
        }
        NSLog(@"city = %@", city);
        self.cityLabel.text=city;
  

//
}
else if (error == nil && [array count] == 0)
{
NSLog(@"No results were returned.");
}
else if (error != nil)
{
NSLog(@"An error occurred = %@", error);
}
}];
//系統會一直更新數據，直到選擇停止更新，因為我們只需要獲得一次經緯度即可，所以獲取之后就停止更新
[manager stopUpdatingLocation];
}
</pre>