當前位置警報和點在iOS8中未顯示

Question

從iOS7移至iOS8時，我的應用程序未顯示警報或當前位置的藍點。我試圖根據我在這裏閱讀的內容更改我的代碼，現在警報正在顯示，但只是瞬間，沒有給出選擇任何內容的機會。不用說藍點也不在那裏。 我的代碼是：

MapName.h

#import <UIKit/UIKit.h> 
#import <MapKit/MapKit.h> 
#import <CoreLocation/CoreLocation.h> 

@interface MapName : UIViewController <MKMapViewDelegate> 

@property (strong, nonatomic) IBOutlet MKMapView *MapName; 
@property (nonatomic, retain) CLRegion *region; 
@property (nonatomic) BOOL showsUserLocation; 

@end 

MapName.m

//in the (void)viewDiDLoad section 
CLLocationManager *locationManager = [[CLLocationManager alloc]init]; 
locationManager.delegate = _MapName; //Assigning to 'id<CLLocationManagerDelegate>' from incompatible type 'MKMapView*_strong' warning showing here 
[locationManager requestWhenInUseAuthorization]; 
[locationManager startUpdatingLocation]; 
CLAuthorizationStatus status = [CLLocationManager authorizationStatus]; 
if (status == kCLAuthorizationStatusDenied || 
    status == kCLAuthorizationStatusAuthorizedWhenInUse) { 
    //UIApplication -openUrl: UIApplicationOpenSettingsURLString //this is the example shown on WWDC 
} 

[locationManager requestWhenInUseAuthorization]; 
[locationManager startMonitoringForRegion:_region]; 

我添加NSLocationWhenIsUseUsageDescription字符串的消息（這是我在警報見） Info.plist

Answer 1

問題解決：

MapName.h

#import <UIKit/UIKit.h> 
#import <MapKit/MapKit.h> 
#import <CoreLocation/CoreLocation.h> 


@interface MapName : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate> 

@property (strong, nonatomic) IBOutlet MKMapView *MapName; 
@property (strong, nonatomic) CLLocationManager *locationManager; 

@end 

MapName.m

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 

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

//Center the map 
[self gotoLocation]; 

//Show current position 
_MapName.showsUserLocation = YES; 

} 

添加鍵NSLocationWhenInUseUsageDescription作爲一個字符串的Info.plist第一