Question

如何从非UI类（iOS 8及更高版本）获取用户访问位置服务的权限？无论我做什么 - requestWhenInUseAuthorization都不会提醒用户。我使用的是目标c。

我也在plist文件中添加了密钥。

LocationController.h

@interface LocationController : NSObject <CLLocationManagerDelegate>{
    BOOL _debug;
}

@property (strong, nonatomic) CLLocationManager *locationManager;

@property (strong, nonatomic) CLLocation *location;

- (id)initWithDebug:(BOOL)debug_flag;

@end

LocationController.m

@implementation LocationController  {
}

@synthesize debug, locationManager, location;

#define IOS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)

- (id)initWithDebug:(BOOL)debug_flag {
    self = [super init];
   if (self) {
    [self findLocation];
   }
   return self;
}


-(void) findLocation{
    self.locationManager = [[CLLocationManager  alloc] init];
    self.locationManager.delegate = self;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    self.locationManager.distanceFilter = kCLDistanceFilterNone;
    [self checkLocationPermissions];
    self.location = self.locationManager.location;
}

-(void)checkLocationPermissions {
    if ([CLLocationManager locationServicesEnabled]) {
        if (IOS_8_OR_LATER) {
            [self.locationManager requestWhenInUseAuthorization];
        } else {
            [self.locationManager startUpdatingLocation];
        }
    }
}

#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager*)manager    didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
    switch (status) {
        case kCLAuthorizationStatusNotDetermined: {
            [self.locationManager startUpdatingLocation];
        } break;
        case kCLAuthorizationStatusDenied: {
            [self.locationManager stopUpdatingLocation];
        } break;
        case kCLAuthorizationStatusAuthorizedWhenInUse:
        case kCLAuthorizationStatusAuthorizedAlways: {
            [self.locationManager startUpdatingLocation];
        } break;
        default:
            break;
    }
}

@end

修改代码到达[self.locationManager requestWhenInUseAuthorization];但从不显示警报。

此代码是从SDK中的blockOperation调用的。 SDK初始化为singleton

Answer 1

显然在iOS 8 SDK中，在开始位置更新之前，需要requestAlwaysAuthorization（用于后台位置）或requestWhenInUseAuthorization（仅在前台时的位置）调用CLLocationManager。

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

尝试这个

    #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];

更多详情请参阅此链接-----＆gt; http://nevan.net/2014/09/core-location-manager-changes-in-ios-8/

Answer 2

在.m文件中添加：

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


#import "ViewController.h"
 @interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];




// Do any additional setup after loading the view, typically from a nib.



self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;

#ifdef __IPHONE_8_0

if(IS_OS_8_OR_LATER) {
    // Use one or the other, not both. Depending on what you put in info.plist
    [self.locationManager requestWhenInUseAuthorization];
    [self.locationManager requestAlwaysAuthorization];
}

#endif [self.locationManager startUpdatingLocation];

NSLog(@"latitude: %f, longitude: %f",self.locationManager.location.coordinate.latitude,self.locationManager.location.coordinate.longitude);

}

Answer 3

将框架添加到项目中并导入到viewcontroller：CoreLocation.framework

将此委托添加到viewcontroller：CLLocationManagerDelegate

在.plist文件中添加键值：NSLocationWhenInUseUsageDescription：“您的消息”

修改

+ (YourNSObjectClasssName*)sharedInstance { @synchronized(self) { if (location == nil) { location = [[super allocWithZone:NULL] init] ; } } return location; } - (id)init { self = [super init]; if (self) {} return self; } #pragma mark - Start Location Updates -(void)startLocationUpdate{ CLLocationManager *locationManager = [[CLLocationManager alloc]init]; locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation; locationManager.delegate = self; locationManager.distanceFilter = 10.0f; if(![CLLocationManager locationServicesEnabled] || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied){ UIAlertView* failedStatus=[[UIAlertView alloc]initWithTitle:APP_NAME message:@"Would like to Use your location Please Enable Location Service in Setting" delegate:self cancelButtonTitle:@"Setting" otherButtonTitles:@"Cancel", nil]; [failedStatus show]; } else if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) { [locationManager requestWhenInUseAuthorization]; } else{ [locationManager startUpdatingLocation]; [locationManager startMonitoringSignificantLocationChanges]; } }

这就是你如何从另一个类调用startUpdate函数

[[LocationTracker sharedInstance] startLocationUpdate];

这里我没有为＆lt;添加条件iOS 8.0。为此，你可以参考维杰的答案。（如果用户移动超过10米，则distanceFilter = 10.0正在更新位置。）

如果此代码仍无效，请尝试以下案例：

从iPhone删除您的应用程序并重启您的设备。

更改您的iPhone日期和日期不应超过24 几小时又重新启动你的iPhone。

运行您的应用程序它会请求您的许可。

这背后的主要原因是苹果将要求获得访问用户隐私的任何许可超过24小时。

希望这对你有所帮助。

iOS 8位置服务权限

3 个答案: