1.导入框架

<pre>

import <CoreLocation/CoreLocation.h>

</pre>

2.定义对象

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

3.开始定位

<pre>
//定位服务
-(void)LocationService
{

if ([CLLocationManager locationServicesEnabled]) {
    // 初始化定位管理器
    self.locationManager=[[CLLocationManager alloc]init];
    self.locationManager.delegate=self;
    // 设置定位精确度到千米
    self.locationManager.desiredAccuracy=kCLLocationAccuracyKilometer;
    // 设置过滤器为无
    self.locationManager.distanceFilter=kCLDistanceFilterNone;
    //这句话ios8以上版本使用
    [ self.locationManager requestAlwaysAuthorization];
    //开始定位
    [ self.locationManager startUpdatingLocation];
} else {
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"无法定位" message:@"请检查你的设备是否开启定位功能" delegate:nil cancelButtonTitle:@"确定" 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
  {

  // 获取当前所在的城市名
  CLGeocoder *geocoder = [[CLGeocoder alloc] init];
  //根据经纬度反向地理编译出地址信息
  [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray*array, NSError *error){
  if (array.count > 0){
  CLPlacemark *placemark = [array objectAtIndex:0];

        //获取城市
        NSString \*city = placemark.locality;
        if (!city) {
            //四大直辖市的城市信息无法通过locality获得，只能通过获取省份的方法来获得（如果city为空，则可知为直辖市）
            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);
}
}];
//系统会一直更新数据，直到选择停止更新，因为我们只需要获得一次经纬度即可，所以获取之后就停止更新
[manager stopUpdatingLocation];
}
</pre>