iOS获取当前城市

1.倒入头文件

#import <CoreLocation/CoreLocation.h>

2.实现定位协议CLLocationManagerDelegate

3.定义定位属性

@property(nonatomic,retain)CLLocationManager *locationManager;

4.開始定位

- (void)locate

{

//
推断定位操作是否被同意

if([CLLocationManager
locationServicesEnabled]) {

self.locationManager = [[CLLocationManager
alloc] init] ;

self.locationManager.delegate
= self;

}else {

//提示用户无法进行定位操作

UIAlertView *alertView = [[UIAlertView
alloc]initWithTitle:

@"提示"
message:@"定位不成功 ,请确认开启定位"
delegate:nil
cancelButtonTitle:@"取消"
otherButtonTitles:@"确定",
nil];

[alertView
show];

}

//
開始定位

[self.locationManager
startUpdatingLocation];

}

5.实现定位协议回调方法

#pragma mark - CoreLocation Delegate

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray
*)locations

{

//此处locations存储了持续更新的位置坐标值，取最后一个值为最新位置，假设不想让其持续更新位置，则在此方法中获取到一个值之后让locationManager stopUpdatingLocation

CLLocation *currentLocation = [locations
lastObject];

//
获取当前所在的城市名

CLGeocoder *geocoder = [[CLGeocoder
alloc] init];

//依据经纬度反向地理编译出地址信息

[geocoder
reverseGeocodeLocation:currentLocation
completionHandler:^(NSArray *array,
NSError *error)

{

if (array.count >
)

{

CLPlacemark *placemark = [array
objectAtIndex:];

//将获得的全部信息显示到label上

NSLog(@"%@",placemark.name);

//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，仅仅能通过获取省份的方法来获得（假设city为空，则可知为直辖市）

city = placemark.administrativeArea;

}

self.cityName = city;

}

else if (error ==
nil && [array count] ==
)

{

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。由于我们仅仅须要获得一次经纬度就可以，所以获取之后就停止更新

[manager stopUpdatingLocation];

}

- (void)locationManager:(CLLocationManager *)manager

didFailWithError:(NSError *)error {

if (error.code ==
kCLErrorDenied) {

//
提示用户出错原因。可按住Option键点击 KCLErrorDenied的查看很多其它出错信息，可打印error.code值查找原因所在

}

}