首先导入头文件
#import <CoreLocation/CoreLocation.h>
在info.plist文件中添加:
注:NSLocationAlwaysUsageDescription可以不添加
下面是具体用法的demo:
注意:
1.[CLLocationManager locationServicesEnabled]判断定位是否开启是判断的整个手机系统的定位是否打开,并不是针对这一应用.
2.具体在本应用中的是否已经授权定位要通过代理方法判断
如果定位失败(未授权)则会执行此代理方法
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
}
具体代码:
@interface ViewController ()<CLLocationManagerDelegate>
{
CLLocationManager * locationManager;
NSString * currentCity; //当前城市
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self locate];
}
- (void)locate {
//判断定位功能是否打开
if ([CLLocationManager locationServicesEnabled]) {
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
// [locationManager requestAlwaysAuthorization];
currentCity = [[NSString alloc] init];
[locationManager startUpdatingLocation];
}
}
#pragma mark CoreLocation delegate
//定位失败则执行此代理方法
//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];
}
//定位成功
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations {
[locationManager stopUpdatingLocation];
CLLocation *currentLocation = [locations lastObject];
CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
//反编码
[geoCoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
if (placemarks.count > 0) {
CLPlacemark *placeMark = placemarks[0];
currentCity = placeMark.locality;
if (!currentCity) {
currentCity = @"无法定位当前城市";
}
NSLog(@"%@",currentCity); //这就是当前的城市
NSLog(@"%@",placeMark.name);//具体地址: xx市xx区xx街道
}
else if (error == nil && placemarks.count == 0) {
NSLog(@"No location and error return");
}
else if (error) {
NSLog(@"location error: %@ ",error);
}
}];
}
@end
