檢查iOS上的位置服務權限

Question

如何檢查我的應用是否啓用位置服務？

我有2個故事板，我想檢查位置服務。如果爲我的應用啓用位置服務，我想要啓動帶位置的地圖故事板。否則，我想推出另一個故事板。我該如何編程？

Answer 1

這是正確的。

這背後

if ([CLLocationManager locationServicesEnabled]){ 

    NSLog(@"Location Services Enabled"); 

    if ([CLLocationManager authorizationStatus]==kCLAuthorizationStatusDenied){ 
     alert = [[UIAlertView alloc] initWithTitle:@"App Permission Denied"  
              message:@"To re-enable, please go to Settings and turn on Location Service for this app." 
              delegate:nil 
           cancelButtonTitle:@"OK" 
           otherButtonTitles:nil]; 
     [alert show]; 
    } 
} 

Answer 2

檢查CLLocationManager的locationServicesEnabled屬性來檢查系統範圍的可用性。使用您的CLLocationManagerDelegate的locationManager：didFailWithError：方法並檢查kCLErrorDenied錯誤以查看用戶是否拒絕了位置服務。

BOOL locationAllowed = [CLLocationManager locationServicesEnabled]; 
if (!locationAllowed) 
{ 
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Location Service Disabled" 
                 message:@"To re-enable, please go to Settings and turn on Location Service for this app." 
                 delegate:nil 
               cancelButtonTitle:@"OK" 
               otherButtonTitles:nil]; 
     [alert show]; 
     [alert release]; 
} 

爲您的應用程序使用此代碼

- (void)viewDidLoad 
{ 
    locationManager = [[CLLocationManager alloc] init]; 

    locationManager.delegate = self; 

    locationManager.desiredAccuracy = kCLLocationAccuracyKilometer; 

    // Set a movement threshold for new events. 

    locationManager.distanceFilter = 500; 

    [locationManager startUpdatingLocation]; 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
} 

- (void)locationManager:(CLLocationManager *)manager 

    didUpdateLocations:(NSArray *)locations { 

    // If it's a relatively recent event, turn off updates to save power 

} 

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error 
{ 

    NSLog(@"%@",error); 
} 

如果位置服務禁用您的應用程序，然後它給你錯誤

Error Domain=kCLErrorDomain Code=1 "The operation couldn’t be completed. (kCLErrorDomain error 1.)" 

Answer 3

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{ 

    NSLog(@"%@",error.userInfo); 
    if([CLLocationManager locationServicesEnabled]){ 

     NSLog(@"Location Services Enabled"); 

     if([CLLocationManager authorizationStatus]==kCLAuthorizationStatusDenied){ 
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"App Permission Denied" 
               message:@"To re-enable, please go to Settings and turn on Location Service for this app." 
               delegate:nil 
            cancelButtonTitle:@"OK" 
            otherButtonTitles:nil]; 
      [alert show]; 
     } 
    } 
} 

原因，這種方法會打電話的時候你的服務將被關閉定位服務。這段代碼對我很有用。

Answer 4

經過大量的調查。我建議在標籤上顯示此消息，而不是在警報視圖中顯示。因爲有很多情況需要測試（用戶通常禁用位置服務，或者僅用於應用程序，刪除應用程序，重新安裝）。

其中一種情況會導致您的警報同時顯示您的消息以及蘋果的警報消息。你的警報將會落後於蘋果的警惕。這是一個令人困惑和不合邏輯的行爲。

我提出以下建議：

斯威夫特3：

func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) { 

    switch status { 
     case .notDetermined: 
      Log.verbose("User still thinking granting location access!") 
      manager.startUpdatingLocation() // this will access location automatically if user granted access manually. and will not show apple's request alert twice. (Tested) 
     break 

     case .denied: 
      Log.verbose("User denied location access request!!") 
      // show text on label 
      label.text = "To re-enable, please go to Settings and turn on Location Service for this app." 

      manager.stopUpdatingLocation() 
      loadingView.stopLoading() 
     break 

     case .authorizedWhenInUse: 
      // clear text 
      label.text = "" 
      manager.startUpdatingLocation() //Will update location immediately 
     break 

     case .authorizedAlways: 
      // clear text 
      label.text = "" 
      manager.startUpdatingLocation() //Will update location immediately 
     break 
     default: 
      break 
    } 
} 

的Objective-C：

- (void)locationManager:(CLLocationManager*)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status { 
    switch (status) { 
     case kCLAuthorizationStatusNotDetermined: { 
      DDLogVerbose(@"User still thinking granting location access!"); 
      [locationManager startUpdatingLocation]; // this will access location automatically if user granted access manually. and will not show apple's request alert twice. (Tested) 
     } break; 
     case kCLAuthorizationStatusDenied: { 
      DDLogVerbose(@"User denied location access request!!"); 
      // show text on label 
      label.text = @"To re-enable, please go to Settings and turn on Location Service for this app."; 

      [locationManager stopUpdatingLocation]; 
      [loadingView stopLoading]; 
     } break; 
     case kCLAuthorizationStatusAuthorizedWhenInUse: 
     case kCLAuthorizationStatusAuthorizedAlways: { 
      // clear text 
      label.text = @""; 
      [locationManager startUpdatingLocation]; //Will update location immediately 
     } break; 
     default: 
      break; 
    } 
} 

Answer 5

測試在iOS 9.2

爲了得到locatio ñ更新要經常檢查用戶的iOS設備啓用

• 位置服務和
• 位置服務啓用特定應用

，正確設置屏幕上推出用戶啓用

啓動iOS設備位置設置頁面

步驟。1轉到項目設置 - >信息 - > URL類型 - >添加新的URL方案

Step.2使用下面的代碼，推出直撥電話的位置設置頁面： （注：URL計劃是在iOS的不同10+，我們檢查版本說明here）

#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice 
currentDevice] systemVersion] compare:v options:NSNumericSearch] == 
NSOrderedAscending) 

//Usage 
NSString* url = SYSTEM_VERSION_LESS_THAN(@"10.0") ? @"prefs:root=LOCATION_SERVICES" : @"App-Prefs:root=Privacy&path=LOCATION"; 
      [[UIApplication sharedApplication] openURL:[NSURL URLWithString: url]]; 

啓動應用程序部位S ettings頁

下面的代碼用於啓動直接應用程序的位置設置頁面

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]]; 

以下是完整的代碼示例： 的#define SYSTEM_VERSION_LESS_THAN（V）（[[[的UIDevice currentDevice ] systemVersion] compare：v options：NSNumericSearch] == NSOrderedAscending）

CLLocationManager *locationManager; 

-(void) checkLocationServicesAndStartUpdates 
{ 
    locationManager = [[CLLocationManager alloc] init]; 
    locationManager.delegate = self; 
    locationManager.desiredAccuracy = kCLLocationAccuracyBest; 

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

    //Checking authorization status 
    if (![CLLocationManager locationServicesEnabled] && [CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) 
    { 

     UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Location Services Disabled!" 
                  message:@"Please enable Location Based Services for better results! We promise to keep your location private" 
                  delegate:self 
                cancelButtonTitle:@"Settings" 
                otherButtonTitles:@"Cancel", nil]; 

     //TODO if user has not given permission to device 
     if (![CLLocationManager locationServicesEnabled]) 
     { 
      alertView.tag = 100; 
     } 
     //TODO if user has not given permission to particular app 
     else 
     { 
      alertView.tag = 200; 
     } 

     [alertView show]; 

     return; 
    } 
    else 
    { 
     //Location Services Enabled, let's start location updates 
     [locationManager startUpdatingLocation]; 
    } 
} 

處理用戶點擊輸入反應，並啓動正確的位置設置

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex 
{ 

    if(buttonIndex == 0)//Settings button pressed 
    { 
     if (alertView.tag == 100) 
     { 
      //This will open ios devices location settings 
      NSString* url = SYSTEM_VERSION_LESS_THAN(@"10.0") ? @"prefs:root=LOCATION_SERVICES" : @"App-Prefs:root=Privacy&path=LOCATION"; 
      [[UIApplication sharedApplication] openURL:[NSURL URLWithString: url]]; 
     } 
     else if (alertView.tag == 200) 
     { 
      //This will opne particular app location settings 
      [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]]; 
     } 
    } 
    else if(buttonIndex == 1)//Cancel button pressed. 
    { 
     //TODO for cancel 
    } 
} 

Answer 6

最好的辦法，處理所有的情況下！ - >

//First, checking if the location services are enabled 
if(![CLLocationManager locationServicesEnabled]){ 
    [self showMessage:@"Please enable location services to detect location!" withTitle:@"Location not enabled"]; 
} 
else if ([CLLocationManager authorizationStatus]==kCLAuthorizationStatusDenied){ 
    //Now if the location is denied. 
    UIAlertController *alertController = [UIAlertController 
              alertControllerWithTitle:@"Enable location permission" 
              message:@"To auto detect location, please enable location services for this app" 
              preferredStyle:UIAlertControllerStyleAlert]; 

    alertController.view.tintColor = AppColor; 
    UIAlertAction *cancelAction = [UIAlertAction 
            actionWithTitle:@"Dismiss" 
            style:UIAlertActionStyleCancel 
            handler:^(UIAlertAction *action) 
            { 
             NSLog(@"Cancel action"); 
            }]; 

    UIAlertAction *goToSettings = [UIAlertAction 
           actionWithTitle:@"Settings" 
           style:UIAlertActionStyleDefault 
           handler:^(UIAlertAction *action) 
           { 
            //Simple way to open settings module 
            NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString]; 
            [[UIApplication sharedApplication] openURL:url]; 
           }]; 

    [alertController addAction:cancelAction]; 
    [alertController addAction:goToSettings]; 
    [self presentViewController:alertController animated:YES completion:^{ 
     alertController.view.tintColor = AppColor; 
    }]; 
} 
else{ 
    //Do whatever you want here 
} 

Answer 7

---

Swift 3.0 & iOS 10 Solution:

---

self.locationManager?.requestWhenInUseAuthorization() 
if CLLocationManager.locationServicesEnabled() && CLLocationManager.authorizationStatus() != CLAuthorizationStatus.denied { 
      locationManager?.delegate = self 
      locationManager?.desiredAccuracy = kCLLocationAccuracyBestForNavigation 
      locationManager?.distanceFilter = distanceFiler 
      locationManager?.startUpdatingLocation() 
     }else{ 
      let alertView = UIAlertView(title: "Location Services Disabled!", message: "Please enable Location Based Services for better results! We promise to keep your location private", delegate: self, cancelButtonTitle: "Settings", otherButtonTitles: "Cancel") 
      alertView.delegate = self 
      alertView.show() 
      return 
     } 


@objc(alertView:clickedButtonAtIndex:) func alertView(_ alertView: UIAlertView, clickedButtonAt buttonIndex: Int) { 
    if buttonIndex == 0 { 
      if let url = URL(string: "App-Prefs:root=LOCATION_SERVICES") { 
       UIApplication.shared.open(url, completionHandler: .none) 
      } 
    } 
    else if buttonIndex == 1 { 
     //TODO for cancel 
    } 

}