这是该线程的延续/替代方案：popToRootViewControllerAnimated 问题，以更结构化和更易于理解的方式理清问题/错误是什么。
在 VC3 中按下后退按钮时，我想回到 VC1。
我有以下设置：
以下代码：
VC1：
@implementation ViewController
- (IBAction)myButton1:(id)sender {
//Call InformationViewController for Quick Game
[self performSegueWithIdentifier:@"toVC2" sender:self];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
VC2：
@implementation nrTwoViewController
- (IBAction)myButton2:(id)sender {
//Call InformationViewController for Quick Game
[self performSegueWithIdentifier:@"toVC3" sender:self];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
VC3：
@implementation nrThreeViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.navigationController popToRootViewControllerAnimated:YES];
}
@end
我只弹出到 VC2，而不是根 (VC1)，并在 VC3 上按返回按钮时收到以下消息：
2013-10-15 08:36:08.479 segueTest[44153:a0b] nested pop animation can result in corrupted navigation bar
2013-10-15 08:36:08.831 segueTest[44153:a0b] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
按照建议，我还尝试添加 UINavigationBarDelegate：
@interface nrThreeViewController : UIViewController <UINavigationBarDelegate>
...和：
- (BOOL)navigationBar:(UINavigationBar *)navigationBar shouldPopItem:(UINavigationItem *)item {
[self.navigationController popToRootViewControllerAnimated:YES];
return NO;
}
结果：
仅从 VC3 弹出到 VC2，控制台中没有消息。