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Objective c 位置服务在iOS 8中不工作

objective-c ios8

Objective c 位置服务在iOS 8中不工作,objective-c,ios8,location,cllocationmanager,Objective C,Ios8,Location,Cllocationmanager,我在iOS7上运行良好的应用程序与ios8sdk不兼容 CLLocationManager不会返回位置，我也不会在设置->位置服务下看到我的应用程序。我在谷歌上搜索了这个问题，但什么也没找到。有什么问题吗？我最终解决了自己的问题 显然，在iOS 8 SDK中，在开始位置更新之前需要调用CLLocationManager（用于后台位置）或RequestWhenUseAuthorization（仅在前台位置）调用CLLocationManager 还需要NSLocationAlwaysUsageDe

我在iOS7上运行良好的应用程序与ios8sdk不兼容

CLLocationManager
不会返回位置，我也不会在设置->位置服务下看到我的应用程序。我在谷歌上搜索了这个问题，但什么也没找到。有什么问题吗？

我最终解决了自己的问题

显然，在iOS 8 SDK中，在开始位置更新之前需要调用
CLLocationManager
（用于后台位置）或
RequestWhenUseAuthorization
（仅在前台位置）调用
CLLocationManager

还需要
NSLocationAlwaysUsageDescription
或
nsLocationWhenUsageDescription
输入
Info.plist
，并在提示中显示消息。添加这些解决了我的问题

有关更多详细信息，请查看：

我也遇到了同样的问题。Xcode为您提供了以下错误：

正在尝试启动
MapKit
位置更新，而不提示输入 位置授权。必须调用
-[CLLocationManager
使用授权时请求]
或
-[CLLocationManager
请求始终授权]
首先

但是，即使您实现了上述方法之一，它也不会提示用户，除非info.plist中有
NSLocationAlwaysUsageDescription
或
nslocationwhenusagedescription
的条目

在info.plist中添加以下行，其中字符串值表示您需要访问用户位置的原因

<key>NSLocationWhenInUseUsageDescription</key>
<string>This application requires location services to work</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>This application requires location services to work</string>

n不使用时的位置说明
此应用程序需要位置服务才能工作
N位置始终使用说明
此应用程序需要位置服务才能工作
我想自从我在Xcode 5中启动这个项目以来，这些条目可能已经丢失了。我猜Xcode 6可能会为这些键添加默认条目，但尚未确认

您可以根据Apple文档找到关于这两种设置的更多信息：

从iOS 8开始，在应用程序的Info.plist文件中不使用UsageDescription时，需要出现
nsLocation或
NSLocationAlwaysUsageDescription
键值。然后，还需要在注册位置更新之前，通过调用
[self.myLocationManager RequestWhenUseAuthorization]
或
[self.myLocationManager requestAlwaysAuthorization]
请求用户的许可，具体取决于您的需要。然后，您在Info.plist中输入的字符串将显示在随后的对话框中


如果用户授予权限，则一切照旧。如果他们拒绝权限，则不会通知代理位置更新。
要确保这与iOS 7向后兼容，您应该检查用户是运行iOS 8还是iOS 7。例如：


#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)

//In ViewDidLoad
if(IS_OS_8_OR_LATER) {
   [self.locationManager requestAlwaysAuthorization];
}

[self.locationManager startUpdatingLocation];



具有向后兼容性的解决方案：


SEL requestSelector = NSSelectorFromString(@"requestWhenInUseAuthorization");
if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined &&
    [self.locationManager respondsToSelector:requestSelector]) {
    [self.locationManager performSelector:requestSelector withObject:NULL];
} else {
    [self.locationManager startUpdatingLocation];
}



在您的Info.plist解决方案中设置NSLocationWhenUsageDescription key，该解决方案具有向后兼容性，不会产生Xcode警告：


SEL requestSelector = NSSelectorFromString(@"requestWhenInUseAuthorization");
if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined &&
  [self.locationManager respondsToSelector:requestSelector]) {
((void (*)(id, SEL))[self.locationManager methodForSelector:requestSelector])(self.locationManager, requestSelector);
  [self.locationManager startUpdatingLocation];
} else {
  [self.locationManager startUpdatingLocation];
}


设置
nslocationwhenusagedescription
输入您的
Info.plist

对于iOS版本11.0+：

设置
nsLocationAlways和WhenUsageDescription
输入您的
Info.plist
。还有另外两把钥匙
 可以在Xcode 5中编译的我的解决方案：


#ifdef __IPHONE_8_0
    NSUInteger code = [CLLocationManager authorizationStatus];
    if (code == kCLAuthorizationStatusNotDetermined && ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)] || [self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])) {
        // choose one request according to your business.
        if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationAlwaysUsageDescription"]){
            [self.locationManager requestAlwaysAuthorization];
        } else if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationWhenInUseUsageDescription"]) {
            [self.locationManager  requestWhenInUseAuthorization];
        } else {
            NSLog(@"Info.plist does not contain NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription");
        }
    }
#endif
    [self.locationManager startUpdatingLocation];



用于询问位置的旧代码在iOS 8中不起作用。您可以尝试此方法进行位置授权：


- (void)requestAlwaysAuthorization
{
    CLAuthorizationStatus status = [CLLocationManager authorizationStatus];

    // If the status is denied or only granted for when in use, display an alert
    if (status == kCLAuthorizationStatusAuthorizedWhenInUse || status ==        kCLAuthorizationStatusDenied) {
        NSString *title;
        title = (status == kCLAuthorizationStatusDenied) ? @"Location services are off" :   @"Background location is not enabled";
        NSString *message = @"To use background location you must turn on 'Always' in the Location Services Settings";

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
                                                            message:message
                                                           delegate:self
                                                  cancelButtonTitle:@"Cancel"
                                                  otherButtonTitles:@"Settings", nil];
        [alertView show];
    }
    // The user has not enabled any location services. Request background authorization.
    else if (status == kCLAuthorizationStatusNotDetermined) {
        [self.locationManager requestAlwaysAuthorization];
    }
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 1) {
        // Send the user to the Settings for this app
        NSURL *settingsURL = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
        [[UIApplication sharedApplication] openURL:settingsURL];
    }
}


和你的info.plist文件

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，并请求位置管理器授权，要求其启动

信息列表：


<key>NSLocationUsageDescription</key>
<string>I need location</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>I need location</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>I need location</string>



NSLocationWhenInUseUsageDescription



为所有拥有多个Info.plist文件的用户提供的小帮助


find . -name Info.plist | xargs -I {} /usr/libexec/PlistBuddy -c 'Add NSLocationWhenInUseUsageDescription string' {} 


它将向当前目录（及其子文件夹）中的所有Info.plist文件添加所需的标记

另一个是：


find . -name Info.plist | xargs -I {} /usr/libexec/PlistBuddy -c 'Set NSLocationWhenInUseUsageDescription $YOURDESCRIPTION' {} 



它会将您的描述添加到所有文件中。
在
[locationManager startUpdatingLocation]之前，添加iOS8位置服务请求：


if([locationManager respondsToSelector:@selector(requestAlwaysAuthorization)])
    [locationManager requestAlwaysAuthorization];


编辑应用程序的
Info.plist
，并使用将显示给用户的字符串值添加key
NSLocationAlwaysUsageDescription
（例如，
我们尽最大努力保护您的电池寿命。
）

如果您的应用仅在应用打开时才需要位置服务，请更换：


requestAlwaysAuthorization
与
requestwhenUseAuthorization
和


nslocationalwayusagedescription
与
nslocationwhenusagedescription
一起使用


  • 添加键
    nsLocationWhenUsageDescription
    或
    NSLocationAlwaysUsageDescription
    （后台GPS使用）以及字符串，请求在每个目标的
    info.plist
    上使用GPS
    • 

  • 通过运行以下命令请求许可：
    
[自初始化locationManager:locationManager]
    • 
其中，
    initLocationManager
    是：
    

    // asks for GPS authorization on iOS 8
-(void) initLocationManager:(CLLocationManager *) locationManager{

    locationManager = [[CLLocationManager alloc]init];

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

    

    请记住，如果每个目标的
    info.plist
    上都没有按键，则应用程序不会询问用户。
    if
    提供了与iOS 7的兼容性，而
    respondsToSelector:
    方法保证了未来的兼容性，而不仅仅是解决iOS 7和8的问题。
    要访问iOS 8中的用户位置，您必须添加
    

    NSLocationAlwaysUsageDescription in the Info.plist 

    

    这将要求用户获得获取其当前位置的权限。
    对于使用Xamarin的用户，当InUsageDescription
    手动添加到info.plist时，我必须添加键
    nsLocation，因为它在Xamarin 5.5.3 Build 6或XCode 6.1的下拉列表中都不可用-只有
    NSLocationUsageDescription
    在列表中，这导致
    CLLocationManager
    继续无声地失败。
    我正在开发一个升级到iOS的应用程序

            // ** Don't forget to add NSLocationWhenInUseUsageDescription in MyApp-Info.plist and give it a string

        self.locationManager = [[CLLocationManager alloc] init];
        self.locationManager.delegate = self;
        // Check for iOS 8. Without this guard the code will crash with "unknown selector" on iOS 7.
        if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
            [self.locationManager requestWhenInUseAuthorization];
        }
        [self.locationManager startUpdatingLocation];


    // Location Manager Delegate Methods    
    - (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
    {
        NSLog(@"%@", [locations lastObject]);

}

    

            // ** Don't forget to add NSLocationWhenInUseUsageDescription in MyApp-Info.plist and give it a string

        self.locationManager = [[CLLocationManager alloc] init];
        self.locationManager.delegate = self;
        // Check for iOS 8. Without this guard the code will crash with "unknown selector" on iOS 7.
        if ([self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
            [self.locationManager requestWhenInUseAuthorization];
        }
        [self.locationManager startUpdatingLocation];


    // Location Manager Delegate Methods    
    - (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
    {
        NSLog(@"%@", [locations lastObject]);

}

    

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

    

    - (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:  (CLAuthorizationStatus)status
{
    [self gotoCurrenLocation];
}

    

    - (void)viewDidLoad
{
    
    [super viewDidLoad];
    self.locationManager = [[CLLocationManager alloc] init];
    
    self.locationManager.delegate = self;
    if([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]){
        NSUInteger code = [CLLocationManager authorizationStatus];
        if (code == kCLAuthorizationStatusNotDetermined && ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)] || [self.locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)])) {
            // choose one request according to your business.
            if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationAlwaysUsageDescription"]){
                [self.locationManager requestAlwaysAuthorization];
            } else if([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationWhenInUseUsageDescription"]) {
                [self.locationManager  requestWhenInUseAuthorization];
            } else {
                NSLog(@"Info.plist does not contain NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription");
            }
        }
    }
    [self.locationManager startUpdatingLocation];
}

>  #pragma mark - CLLocationManagerDelegate

    - (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 didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
    {
        NSLog(@"didUpdateToLocation: %@", newLocation);
        CLLocation *currentLocation = newLocation;
        
        if (currentLocation != nil) {
            longitudeLabel.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
            latitudeLabel.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
        }
    }

    

    "NSLocationWhenInUseUsageDescription" = "I need GPS information....";

    

    if (IS_OS_8_OR_LATER)
{
    [locationmanager requestWhenInUseAuthorization];

    [locationmanager requestAlwaysAuthorization];
}

    

     <key>NSLocationUsageDescription</key>
 <string>I need location</string>
 <key>NSLocationAlwaysUsageDescription</key>
 <string>I need location</string>
 <key>NSLocationWhenInUseUsageDescription</key>
 <string>I need location</string>

    

    import UIKit
import MapKit
import CoreLocation

class MapViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {

    // MARK: Properties
    @IBOutlet weak var mapView: MKMapView!

    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()

        self.locationManager.delegate = self
        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
        self.locationManager.requestWhenInUseAuthorization()
        self.locationManager.startUpdatingLocation()
        self.mapView.showsUserLocation = true

    }

    // MARK: - Location Delegate Methods

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let location = locations.last
        let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 1, longitudeDelta: 1))
        self.mapView.setRegion(region, animated: true)
    }

    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
        print("Errors: " + error.localizedDescription)
    }
}

    

        <key>NSLocationWhenInUseUsageDescription</key>
    <string>Because I want to know where you are!</string>
    <key>NSLocationAlwaysUsageDescription</key>
    <string>Want to know where you are!</string>

    

     1. NSLocationAlwaysAndWhenInUseUsageDescription 
 2. NSLocationWhenInUseUsageDescription
 3. NSLocationAlwaysUsageDescription

    

    NSLocationWhenInUseUsageDescription

    

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

    

    #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];
}

    

     1. NSLocationAlwaysAndWhenInUseUsageDescription 
 2. NSLocationWhenInUseUsageDescription
 3. NSLocationAlwaysUsageDescription

    

    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()
    }
}

    

    //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

}