Question

我试图在iOS 8上使用MapKit并且我一直收到错误：

Trying to start MapKit location updates without prompting for location authorization. Must call   
-[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager 
requestAlwaysAuthorization] first.

在这里查看，我发现我必须在我的plist中实现NSLocationWhenInUsageDescription，但没有任何反应，我仍然在控制台中得到错误。我做错了什么？

Answer 1

1.-将以下行添加到info.plist

<key>NSLocationWhenInUseUsageDescription</key>
<string>The spirit of stack overflow is coders helping coders</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>I have learned more on stack overflow than anything else</string>

2.-提示位置授权：

 if ([self.locationManager  respondsToSelector:@selector(requestAlwaysAuthorization)]) {
               [self.locationManager requestAlwaysAuthorization];

3. - 用户接受后更新位置...

   - (void) locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{

        if (status == kCLAuthorizationStatusAuthorizedAlways || status == kCLAuthorizationStatusAuthorizedWhenInUse) {
            [self.locationManager startUpdatingLocation];

    }
}

Answer 2

只需在CLLocationManager初始化中添加这些代码。

例如： @property (strong, nonatomic) CLLocationManager *locationManager; 然后在您的实现中，只需在调用更新函数之前调用[self.locationManager requestWhenInUseAuthorization];。

Answer 3

在cllocationmanager初始化检查ios 8后，并要求获得许可

locationManager = [[CLLocationManager alloc] init];// [[[CLLocationManager alloc] init] autorelease];
    locationManager.delegate = self;
    // Check for iOS 8. Without this guard the code will crash with "unknown selector" on iOS 7.
    if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
        [locationManager requestWhenInUseAuthorization];
    }

参考http://nevan.net/2014/09/core-location-manager-changes-in-ios-8/

Answer 4

除了在PList中实现密钥（我有NSLocationWhenInUseUsageDescritpion和Privacy - Location Usage Description）之外，我还使用以下代码解决了警告：

if ([CLLocationManager locationServicesEnabled])
{
    CLAuthorizationStatus status = [CLLocationManager authorizationStatus];
    if (status == kCLAuthorizationStatusRestricted || status == kCLAuthorizationStatusDenied || status ==  kCLAuthorizationStatusNotDetermined) {
    } else {
        _mapView.showsUserLocation = YES;
    }
}

尝试启动MapKit位置更新而不提示使用objective-c在ios 9中进行位置授权

4 个答案: