判断gps是否开启

+ (BOOL)locationServicesEnabled {    if (([CLLocationManager locationServicesEnabled]) && ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorized)) {

 NSLog(@"手机gps定位已经开启");
        return YES;    } else {

   NSLog(@"手机gps定位未开启");
        return NO;    } }