iOS定位当前城市
1、首先在plist表里边添加Privacy - Location Usage Description和NSLocationWhenInUseUsageDescription（这个是在程序使用期间进行定位，如果需要一直获取，添加NSLocationAlwaysUsageDescription），都为String类型
2、其次在.m中引入CoreLocation/CoreLocation.h头文件，并且遵循CLLocationManagerDelegate代理。然后定义一个CLLocationManager对象，代码如下：
#import"CoreLocation/CoreLocation.h"
@interfaceViewController ()
@property (strong, nonatomic) CLLocationManager*locationManager;
@end
if ([CLLocationManager locationServicesEnabled]) {//判断定位操作是否被允许
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;//遵循代理
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
self.locationManager.distanceFilter = 10.0f;
[_locationManager requestWhenInUseAuthorization];//使用程序其间允许访问位置数据（iOS8以上版本定位需要）
[self.locationManager startUpdatingLocation];//开始定位
}else{//不能定位用户的位置的情况再次进行判断，并给与用户提示
//1.提醒用户检查当前的网络状况
//2.提醒用户打开定位开关
}
}
#pragma mark === 定位代理方法
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
//当前所在城市的坐标值
CLLocation *currLocation = [locations lastObject];
NSLog(@"经度=%f 纬度=%f 高度=%f", currLocation.coordinate.latitude, currLocation.coordinate.longitude, currLocation.altitude);
//根据经纬度反向地理编译出地址信息
CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:currLocation completionHandler:^(NSArray *placemarks, NSError *error) {
for (CLPlacemark * placemark in placemarks) {
NSDictionary *address = [placemark addressDictionary];
// Country(国家) State(省) City（市）
NSLog(@"#####%@",address);
NSLog(@"%@", [address objectForKey:@"Country"]);
NSLog(@"%@", [address objectForKey:@"State"]);
NSLog(@"%@", [address objectForKey:@"City"]);
self.cllocationCity =[address objectForKey:@"City"];
}
}];
}
//定位失败弹出提示框,点击"打开定位"按钮,会打开系统的设置,提示打开定位服务
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
UIAlertController * alertVC = [UIAlertController alertControllerWithTitle:@"允许\"定位\"提示" message:@"请在设置中打开定位" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction * ok = [UIAlertAction actionWithTitle:@"打开定位" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//打开定位设置
NSURL *settingsURL = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
[[UIApplication sharedApplication] openURL:settingsURL];
}];
UIAlertAction * cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
}];
[alertVC addAction:cancel];
[alertVC addAction:ok];
[self presentViewController:alertVC animated:YES completion:nil];
}