Question

从iOS7移动到iOS8，我的应用程序没有显示当前位置的警报或蓝点。我试图根据我在这里阅读的内容更改我的代码，现在警报显示但仅仅是一瞬间，没有机会选择任何东西。毋庸置疑，蓝点也不存在。我的代码是：

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];

我已将NSLocationWhenIsUseUsageDescription字符串添加到Info.plist中的消息（我在警报中看到）

Answer 1

问题解决了：

<强> 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

<强> 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;

}

首先将密钥NSLocationWhenInUseUsageDescription作为字符串添加到Info.plist中

当前位置警报和点在iOS8中不显示

1 个答案: