在iOS8的设备上，使用高德地图SDK你会发现MAMapView里的回调位置是空的。

-(void)mapView:(MAMapView*)mapView didUpdateUserLocation:(MAUserLocation*)userLocation updatingLocation:(BOOL)updatingLocation
{
    CLLocation *currentLocation = userLocation.location;
    if (currentLocation) {
    }
}

在iOS8上currentLocation是空的，导致定位失败了。我们知道苹果在iOS8上对定位进行了大幅度优化，可以支持室内定位，常去地点统计，楼层等。

高德失败的原因可能是未对iOS8做适配。

解决方法是:

1.工程的info.plist添加NSLocationWhenInUseDescription，NSLocationAlwaysUsageDescription字段，不同的字段对应的方法不同

2.在AppDelegate.m中声明个CLLocationManager私有变量，代码如下:

@interface AppDelegate()<CLLocationManagerDelegate>
{
    UINavigationController *_navController;
    CLLocationManager      *_locationmanager;
}

@end

@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [UIApplication sharedApplication].idleTimerDisabled = TRUE;
    
    _locationmanager = [[CLLocationManager alloc] init];
    [_locationmanager requestAlwaysAuthorization];        //NSLocationAlwaysUsageDescription
    [_locationmanager requestWhenInUseAuthorization];     //NSLocationWhenInUseDescription
    _locationmanager.delegate = self;
}

-(void)mapView:(MAMapView*)mapView didUpdateUserLocation:(MAUserLocation*)userLocation updatingLocation:(BOOL)updatingLocation

iOS8 高德地图SDK MAMapView无法定位的问题