iOS系統自帶定位，用CLLocationManager就可以輕鬆的實現定位的操作，獲得的是一組經緯度，當然，也可以根據給出的經緯度獲取相應的省份、城市、街道等資訊，下面就看一個根據經緯度獲得城市的demo：

        因為獲取經緯度需要CLLocationManager類，而這個類包含在CoreLocation框架中，獲取城市資訊需要mapKit框架，所以需要首先在工程中匯入這兩個框架：

匯入框架的步驟：選擇1.target――2.Build Phases――3.Link Binary With Libraries ――4.點選“+”號：如圖所示步驟：

點選加號之後在搜尋框裡輸入相應的框架，即可搜尋到，如圖所示

下面就該寫程式碼了，首先在檢視控制器中匯入：

#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>

兩個標頭檔案，然後.m中的具體程式碼如下：

#import "ANNViewController.h"


@interface ANNViewController ()
@property (strong, nonatomic) IBOutlet UILabel *longitude;
@property (strong, nonatomic) IBOutlet UILabel *latitude;

@property
 
 (strong, nonatomic) IBOutlet UILabel *location;
@property (strong, nonatomic) CLLocationManager *locationManager;

@end

@implementation ANNViewController

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor
 
 whiteColor];

//建立CLLocationManager物件
self.locationManager = [[CLLocationManager alloc] init];
//設定代理為自己
self.locationManager.delegate = self;

}
- (IBAction)locationButton:(UIButton *)sender {
[self.locationManager startUpdatingLocation];
}

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

//將經度顯示到label上
self.longitude.text = [NSString stringWithFormat:@"%lf", newLocation.coordinate.longitude];
//將緯度現實到label上
self.latitude.text = [NSString stringWithFormat:@"%lf", newLocation.coordinate.latitude];

// 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資訊
[geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *array, NSError *error)
 {
 if (array.count > 0)
 {
 CLPlacemark *placemark = [array objectAtIndex:0];
 
 //將獲得的所有資訊顯示到label上
 self.location.text = placemark.name;
 //獲取城市
 NSString *city = placemark.locality;
 if (!city) {
 //四大直轄市的城市資訊無法通過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);
 
 }
 else if (error == nil && [array count] == 0)
 {
 NSLog(@"No results were returned.");
 }
 else if (error != nil)
 {
 NSLog(@"An error occurred = %@", error);
 }
 }];

//系統會一直更新資料，直到選擇停止更新，因為我們只需要獲得一次經緯度即可，所以獲取之後就停止更新
[manager stopUpdatingLocation];
}

主要就是直轄市的城市獲得需要拐個彎，iOS7添加了一個新的方法，代替了上面這個方法：

- (void)locationManager:(CLLocationManager *)manager
 didUpdateLocations:(NSArray *)locations
{
    NSLog(@"longitude = %f", ((CLLocation *)[locations
lastObject]).coordinate.longitude);
    NSLog(@"latitude = %f", ((CLLocation *)[locations lastObject]).coordinate.latitude);
    
    [manager stopUpdatingLocation];
}

後面的處理和上面的方法一樣，大家可以看一下。

另外還有一些CLGeocoder的屬性如下：

@property (nonatomic, readonly) NSDictionary *addressDictionary;

// address dictionary properties
@property (nonatomic, readonly) NSString *name; // eg. Apple Inc.
@property (nonatomic, readonly) NSString *thoroughfare; // street address, eg. 1 Infinite Loop
@property (nonatomic, readonly) NSString *subThoroughfare; // eg. 1
@property (nonatomic, readonly) NSString *locality; // city, eg. Cupertino
@property (nonatomic, readonly) NSString *subLocality; // neighborhood, common name, eg. Mission District
@property (nonatomic, readonly) NSString *administrativeArea; // state, eg. CA
@property (nonatomic, readonly) NSString *subAdministrativeArea; // county, eg. Santa Clara
@property (nonatomic, readonly) NSString *postalCode; // zip code, eg. 95014
@property (nonatomic, readonly) NSString *ISOcountryCode; // eg. US
@property (nonatomic, readonly) NSString *country; // eg. United States
@property (nonatomic, readonly) NSString *inlandWater; // eg. Lake Tahoe
@property (nonatomic, readonly) NSString *ocean; // eg. Pacific Ocean
@property (nonatomic, readonly) NSArray *areasOfInterest; // eg. Golden Gate Park