Objective-C 遵循以下说明:

iOS-11 对于iOS 11,请查看此答案:iOS 11位置访问

需要在plist中添加两个密钥并提供如下图所示的消息:

 1. NSLocationAlwaysAndWhenInUseUsageDescription 
 2. NSLocationWhenInUseUsageDescription

iOS-10及以下版本:

NSLocationWhenInUseUsageDescription

locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers;
if([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]){
    [locationManager requestWhenInUseAuthorization];
}else{
    [locationManager startUpdatingLocation];
} 

代表方法

#pragma mark - Lolcation Update 
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    NSLog(@"didFailWithError: %@", error);
    UIAlertView *errorAlert = [[UIAlertView alloc]
                               initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [errorAlert show];
}
-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
    switch (status) {
        case kCLAuthorizationStatusNotDetermined:
        case kCLAuthorizationStatusRestricted:
        case kCLAuthorizationStatusDenied:
        {
            // do some error handling
        }
            break;
        default:{
            [locationManager startUpdatingLocation];
        }
            break;
    }
}
- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations
{
    CLLocation *location = [locations lastObject];
    userLatitude =  [NSString stringWithFormat:@"%f", location.coordinate.latitude] ;
    userLongitude =  [NSString stringWithFormat:@"%f",location.coordinate.longitude];
    [locationManager stopUpdatingLocation];
}

SWIFT代码

请按照以下说明操作:

iOS-11 对于iOS 11,请查看此答案:iOS 11位置访问

需要在plist中添加两个密钥并提供如下图所示的消息:

 1. NSLocationAlwaysAndWhenInUseUsageDescription 
 2. NSLocationWhenInUseUsageDescription

iOS-10及以下版本:

import CoreLocation
class ViewController: UIViewController ,CLLocationManagerDelegate {
var locationManager = CLLocationManager()

//MARK- Update Location 
func updateMyLocation(){
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers;
    if locationManager.respondsToSelector(#selector(CLLocationManager.requestWhenInUseAuthorization)){
       locationManager.requestWhenInUseAuthorization()
    }
    else{
        locationManager.startUpdatingLocation()
    }
}

代表方法

//MARK: Location Update
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
    NSLog("Error to update location :%@",error)
}
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    switch status {
    case .NotDetermined: break
    case .Restricted: break
    case .Denied:
            NSLog("do some error handling")
        break
    default:
        locationManager.startUpdatingLocation()
    }
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
     let location = locations.last! as CLLocation
    var latitude = location.coordinate.latitude
    var longitude = location.coordinate.longitude

}

我遇到了同样的问题,在重新安装我的应用程序之后,kCLAuthorizationStatusNotDetermined每当检查时它都会返回,[CLLocationManager authorizationStatus]并且应用程序甚至没有显示在"设置">"隐私">"位置服务"中.

将触发iOS提示用户批准访问位置服务的授权对话框,在[locationManager startUpdatingLocation]此情况下永远不会调用(shouldFetchUserLocation将始终NO).

米格尔C.的解决方案似乎是一个很好的解决方案,将尝试.

编辑iOS8.x

当iOS8出现时,它对CLLocationManager的使用方式几乎没有任何改变.正如在其他答案中提到的那样,与iOS7相比,它需要额外的步骤.今天我自己遇到了这个问题并找到了这篇文章(它已经从多个其他问题中引用,但它完成了我之前的回答).希望能帮助到你!

iOS8通过LocationsServices为我们带来了主要的API更改

假设 [CLLocationManager locationServicesEnabled]返回YES,

首次启动iOS应用程序[iOS7和iOS8] - locationMangers(CLLocationManager)authorizationStatus预设为

authorizationStatus(CLAuthorizationStatus) = kCLAuthorizationStatusNotDetermined

在iOS7 +中提示

启动locationManger(CLLocationManager,Strong)并设置委托(CLLocationManagerDelegate)

现在提示用户使用位置服务并列出应用程序>隐私>位置服务下的应用程序,它必须调用任何位置服务方法,它取决于应用程序要求 - 例如,如果应用程序是以下类型之一

地点更新 - [self.locationManager startUpdatingLocation]

RegionMonitoring - [self.locationManager startMonitoringForRegion:beaconRegion]

在执行上述方法后,iOS将提示用户请求在应用程序中接受使用位置服务,无论用户选择应用程序将在"设置">"隐私">"位置服务"下列出.

在iOS8 +中提示

与iOS8相同,第一次启动App Locations Services

authorizationStatus(CLAuthorizationStatus) = kCLAuthorizationStatusNotDetermined

iOS 8我们获得了向用户显示提示的新方法

[self.locationManager requestAlwaysAuthorization] 
or
[self.locationManager requestWhenInUseAuthorization]

requestAlwaysAuthorization/requestWhenInUseAuthorization可以从iOS8获得.如果App部署目标是iOS7,那么将其包装在if块下以确保在iOS7中这不会导致应用程序崩溃.

if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)])
{
[self.locationManager requestAlwaysAuthorization]; .
}

要么

if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])
{
[self.locationManager requestWhenInUseAuthorization];
}

很重要 ###:

根据iOS8,它必须包含说明为什么app使用requestAlwaysAuthorization/requestWhenInUseAuthorization的字符串在info.plist中包含与app的要求相对应的任何属性

for kCLAuthorizationStatusAuthorizedAlways包括Key/Value(字符串值)对

NSLocationAlwaysUsageDescription = App use Locations service mode Always

for kCLAuthorizationStatusAuthorizedWhenInUse包含Key/Value(字符串值)对

NSLocationWhenInUseUsageDescription = App use Locations service mode In Use 

info.plist的屏幕截图(如果有人对此感到困惑)

你一定是NSLocationWhenInUseUsageDescription加了你的info.plist.它有点奇怪,但只是添加为没有文本的字符串值,然后当你想要位置开始时:

CLLocationManager * locationManager = [[CLLocationManager alloc] init];

[locationManager requestWhenInUseAuthorization];

在iOS 8中,您需要做两件额外的事情才能使位置正常工作:在Info.plist中添加一个密钥,并向位置管理员请求授权以启动它.新位置授权有两个Info.plist键.需要这些键中的一个或两个.如果两个键都不存在,则可以调用startUpdatingLocation,但位置管理器实际上不会启动.它也不会向委托发送失败消息(因为它从未启动过,它不会失败).如果您添加一个或两个密钥但忘记明确请求授权,它也将失败.

因此,您需要做的第一件事是将以下一个或两个密钥添加到Info.plist文件中:

NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription

这两个键都带有一个字符串,它描述了您需要位置服务的原因.您可以输入一个字符串,如"需要位置以查找您所在的位置",如iOS 7中所示,可以在InfoPlist.strings文件中进行本地化.

接下来,您需要请求相应位置方法,WhenInUse或Background的授权.使用以下电话之一:

[self.locationManager requestWhenInUseAuthorization]
[self.locationManager requestAlwaysAuthorization]

有关更多信息.

如果您在iOS8上遇到此问题,请使用:requestWhenInUseAuthorization.