iOS 8 Map Kit Obj-C无法获取用户位置
我正在使用Obj-C不SWIFT在iOS 8中使用Map Kit。 我不能得到设备的位置，它被设置为0.00，0.00，我得到的错误：
Trying to start MapKit location updates without prompting for location authorization. Must call -[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager requestAlwaysAuthorization] first. 我已经执行:(我一次只尝试一次，没有运气）
if(IS_OS_8_OR_LATER) { [self.locationManager requestWhenInUseAuthorization]; [self.locationManager requestAlwaysAuthorization]; } [self.locationManager startUpdatingLocation];
并在info.plist
NSLocationWhenInUseUsageDescription : App would like to use your location. NSLocationAlwaysUsageDescription : App would like to use your location.
我会得到提示，允许应用程序使用我的位置，但我同意没有任何更改。 位置显示为0.00，0.00。
用于显示用户位置的代码：
//Get Location self.locationManager = [[CLLocationManager alloc] init]; self.locationManager.distanceFilter = kCLDistanceFilterNone; self.locationManager.desiredAccuracy = kCLLocationAccuracyBest; [self.locationManager startUpdatingLocation]; MKCoordinateRegion region = { { 0.0, 0.0 }, { 0.0, 0.0 } }; region.center.latitude = self.locationManager.location.coordinate.latitude; region.center.longitude = self.locationManager.location.coordinate.longitude; region.span.longitudeDelta = 0.005f; region.span.longitudeDelta = 0.005f; [mapView setRegion:region animated:YES];
麦克风。
**编辑：查看下面的答案。
我得到了它的工作。 我已经发布了我的代码，以帮助其他人有问题。
这里是我的完整的代码来获取在iOS 8中的MapKit地图视图。
在你的AppName -Info.plist中添加一个新的行，其中的键名是：
NSLocationWhenInUseUsageDescription
要么
NSLocationAlwaysUsageDescription
值是要显示的消息的string：
YourAppName would like to use your location.
在你的头文件中。 （我使用App名称 -Prefix.pch，但YourViewController.h也可以）
#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
YourViewController.h
#import <MapKit/MapKit.h> #import <MapKit/MKAnnotation.h> @interface YourViewController : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate> { } @property(nonatomic, retain) IBOutlet MKMapView *mapView; @property(nonatomic, retain) CLLocationManager *locationManager;
YourViewController.m
- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. mapView.delegate = self; 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]; mapView.showsUserLocation = YES; [mapView setMapType:MKMapTypeStandard]; [mapView setZoomEnabled:YES]; [mapView setScrollEnabled:YES]; } -(void)viewDidAppear:(BOOL)animated { [super viewDidAppear:YES]; self.locationManager.distanceFilter = kCLDistanceFilterNone; self.locationManager.desiredAccuracy = kCLLocationAccuracyBest; [self.locationManager startUpdatingLocation]; NSLog(@"%@", [self deviceLocation]); //View Area MKCoordinateRegion region = { { 0.0, 0.0 }, { 0.0, 0.0 } }; region.center.latitude = self.locationManager.location.coordinate.latitude; region.center.longitude = self.locationManager.location.coordinate.longitude; region.span.longitudeDelta = 0.005f; region.span.longitudeDelta = 0.005f; [mapView setRegion:region animated:YES]; } - (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation { MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800); [self.mapView setRegion:[self.mapView regionThatFits:region] animated:YES]; } - (NSString *)deviceLocation { return [NSString stringWithFormat:@"latitude: %f longitude: %f", self.locationManager.location.coordinate.latitude, self.locationManager.location.coordinate.longitude]; } - (NSString *)deviceLat { return [NSString stringWithFormat:@"%f", self.locationManager.location.coordinate.latitude]; } - (NSString *)deviceLon { return [NSString stringWithFormat:@"%f", self.locationManager.location.coordinate.longitude]; } - (NSString *)deviceAlt { return [NSString stringWithFormat:@"%f", self.locationManager.location.altitude]; }
请享用！
– 麦克风
它不是写在任何地方，但是如果你的应用程序以MapKit开头，即使在实现了MBarton的答案之后，仍然会收到错误消息“尝试启动MapKit位置更新而不提示位置授权”。 为了避免它，你必须在MapKit之前创build一个新的视图控制器，并在那里实现位置pipe理器委托。 我把它称为AuthorizationController。
所以，在AuthorizationController.h中：
#import <UIKit/UIKit.h> #import <CoreLocation/CoreLocation.h> @interface MCIAuthorizationController : UIViewController <CLLocationManagerDelegate> @property (strong, nonatomic) CLLocationManager *locationManager; @end
在AuthorizationController.m中：
- (void)viewDidLoad { [super viewDidLoad]; // Location manager 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]; } } #pragma mark - Location Manager delegates - (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations { NSLog(@"didUpdateLocations: %@", [locations lastObject]); } - (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error { NSLog(@"Location manager error: %@", error.localizedDescription); } - (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status { if (status == kCLAuthorizationStatusAuthorizedWhenInUse) { [self.locationManager startUpdatingLocation]; [self performSegueWithIdentifier:@"startSegue" sender:self]; } else if (status == kCLAuthorizationStatusDenied) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Location services not authorized" message:@"This app needs you to authorize locations services to work." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; } else NSLog(@"Wrong location status"); }
试试这个：
(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status { if (status == kCLAuthorizationStatusAuthorizedWhenInUse) { self.mapView.showsUserLocation = YES; }
你的代码看起来很好，虽然你不需要调用requestWhenInUseAuthorization和其他requestAlwaysAuthorization，select一个你需要的。
显示位置的代码只是分配locationManager，不要期望立即获取位置数据。
你需要等待委托方法被调用： -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations ，那么self.locationManager.location也将被设置。
对于Mikes的回答，我发现同时使用[self.locationManager requestWhenInUseAuthorization]; 和[self.locationManager requestAlwaysAuthorization]; 如他的代码所示，这是行不通的。 你应该只使用一个 。
我假定一些更新的/稳定版本的API进行了一些更改。
我有同样的问题，但在plist文件中添加这两行解决了我的问题
NSLocationWhenInUseUsageDescription
和
NSLocationAlwaysUsageDescription
注：必须提供这两个值的string描述。 你可以在你的控制器文件中使用它们中的任何一个
self.locationManager= [[CLLocationManager alloc] init]; self.locationManager.delegate=self; [self.locationManager requestAlwaysAuthorization];
您必须在控制器中实现CLLOcationManagerDelegate以访问此function
为了扩展已被接受的答案，并且如果您仅使用上述function创build示例项目，除了CoreLocation和Mapkit框架之外，您可能还需要在Xcode 6手动添加UIKit ， Foundation和CoreGraphics框架。
其实，我正在研究CS193P第16讲，这个讲座是关于位置和地图视图的，我不能让位置pipe理员在iOS 8中工作，应用video中的内容。 看着你的答案，我可以使它工作。
Info.plist被修改为答案中所描述的（我使用NSLocationWhenInUseUsageDescription）。
在AddPhotoViewController.hn添加了定义：
#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
在AddPhotoViewController.m中，在ViewDidLoad（self.image之后）中添加了以下代码：
#ifdef __IPHONE_8_0 if(IS_OS_8_OR_LATER) { [self.locationManager requestWhenInUseAuthorization]; } #endif
第一次启动应用程序时，授权只会被询问一次。
AddPhotoViewController.h还添加了以下内容，因为在第16讲中没有提到：
@property (nonatomic) NSInteger locationErrorCode;
shouldPerformSegueWithIdentifier被修改为include else else（！self.location）：
else if (![self.titleTextField.text length]) { [self alert:@"Title required"]; return NO; } else if (!self.location) { switch (self.locationErrorCode) { case kCLErrorLocationUnknown: [self alert:@"Couldn't figure out where this photo was taken (yet)."]; break; case kCLErrorDenied: [self alert:@"Location Services disabled under Privacy in Settings application."]; break; case kCLErrorNetwork: [self alert:@"Can't figure out where this photo is being taken. Verify your connection to the network."]; break; default: [self alert:@"Cant figure out where this photo is being taken, sorry."]; break; } return NO; } else { // should check imageURL too to be sure we could write the file return YES; }
didFailWithError被添加：
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error { self.locationErrorCode = error.code; }
