iOS百度地图步行导航导致地图界面卡死问题、BUG

-(void)viewWillAppear:(BOOL)animated

{    [superviewWillAppear:animated];

    [_mapView performSelector:NSSelectorFromString(@"onNotificationDidBecomeActive")];

    [_mapView viewWillAppear];

}

-(void)viewWillDisappear:(BOOL)animated{

    [super viewWillDisappear:animated];

    [_mapView viewWillDisappear];

}