ios8 定位无效

IOS8以后，需要在info.plist文件里面加NSLocationWhenInUseDescription或NSLocationAlwaysUsageDescription。

    manger = [[CLLocationManager alloc] init];

    manger.delegate = self;

    manger.desiredAccuracy = kCLLocationAccuracyBest;

    manger.distanceFilter = 100.0f;

    [manger requestAlwaysAuthorization];

    [manger startUpdatingLocation];