Question

据我所知，我不相信我做错了但是我得到了：

2011-04-02 14:55:23.350 AppName[42430:207] nested push animation can result in corrupted navigation bar
2011-04-02 14:55:23.352 AppName[42430:207] nested push animation can result in corrupted navigation bar
2011-04-02 14:55:23.729 AppName[42430:207] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
2011-04-02 14:55:23.729 AppName[42430:207] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.

这是我的代码

- (IBAction) btnGetCurrentLocation{
    [SVProgressHUD showWithStatus:@"Getting current location..."];
    locationManager = [[CLLocationManager alloc] init];
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.delegate = self;
    [locationManager startUpdatingLocation];
    [SVProgressHUD dismiss];
}

- (void)locationManager:(CLLocationManager *)manager 
    didUpdateToLocation:(CLLocation *)newLocation 
           fromLocation:(CLLocation *)oldLocation {

    [locationManager stopUpdatingLocation];
    CLLocationCoordinate2D coordinate = newLocation.coordinate;

    LocationMapViewController *locationMapViewController = [[LocationMapViewController alloc] initWithNibName:@"LocationMapViewController_iPhone" bundle:nil];
    locationMapViewController.title=@"Your Title";
    locationMapViewController.centerOfMap = &(coordinate);
    [self.navigationController pushViewController:locationMapViewController animated:YES]; 

}

我用谷歌搜索了它，但是大多数地方都在讨论放动画：不过然后我在下一个屏幕上看不到地图。

Answer 1

每次CLLocationManager通知同一控制器的位置更改时，您都在推送新的控制器。这导致嵌套导航。第一次尝试在该控制器中保存对LocationMapViewController的引用，然后检查它以通知它：

if (self.locationController == null){
     LocationMapViewController *locationMapViewController = [[LocationMapViewController alloc] initWithNibName:@"LocationMapViewController_iPhone" bundle:nil];
    locationMapViewController.title=@"Your Title";
    locationMapViewController.centerOfMap = &(coordinate);
    [self.navigationController pushViewController:locationMapViewController animated:YES]; 
}else{
    [self.locationController locationDidChangeTo: &(coordinate)];
}

另一种方法是在LocationMapViewController中创建CLLocationManager ......

Answer 2

我找到的另一个解决方案我可以将所有代码转换为故事板，而walla，它再次起作用。甜。它不像它看起来那么难，干杯，tronnick

Answer 3

确保您没有同时将两个或多个UIViewControllers推入导航堆栈。

Answer 4

我不是100％确定这是否解决了您的具体问题，但是当我尝试在视频控制器出现之前弹出它时，我收到了nested pop animation can result in corrupted navigation bar消息。覆盖viewDidAppear以在UIViewController子类中设置一个标志，指示视图已出现（记得也要调用[super viewDidAppear]）。在弹出控制器之前测试该标志。如果视图尚未出现，您可能需要设置另一个标记，指示您需要在viewDidAppear内立即弹出视图控制器，一旦它出现。像这样：

@interface MyViewController : UIViewController {
    bool didAppear, needToPop;
}

...并在@implementation ...

中

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    didAppear = YES;
    if (needToPop)
        [self.navigationController popViewControllerAnimated:YES];
}

- (void)myCrucialBackgroundTask {
    // this task was presumably initiated when view was created or loaded....
    ...
    if (myTaskFailed) {  // o noes!
        if (didAppear)
            [self.navigationController popViewControllerAnimated:YES];
        else
            needToPop = YES;
    }
}

重复的popViewControllerAnimated电话有点难看，但这是我能够在目前疲惫状态下工作的唯一方法。

嵌套推送动画可能导致导航栏错误

4 个答案: