iOS 7 UINavigationBar在視圖轉換時未隱藏

Question

我有視圖控制器轉換，如vc1 - > vc2 - > vc1。我需要將UINavigationBar隱藏在vc1中，並顯示在vc2中。

我做到以下幾點：

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 

    self.navigationController.navigationBarHidden = YES; 
} 

- (void)viewWillDisappear:(BOOL)animated 
{ 
    [super viewWillDisappear:animated]; 

    self.navigationController.navigationBarHidden = NO; 
} 

在iOS6的，它工作正常。但在iOS7中，當我從vc1返回到vc2時，導航欄並未隱藏，而是在狀態欄後方向上移動，在轉換動畫完成後，該欄已隱藏。

我怎樣才能真正隱藏導航欄？

Answer 1

嘗試這樣的：

-(void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 
    [self.navigationController setNavigationBarHidden:YES]; 
} 

-(void)viewWillDisappear:(BOOL)animated 
{ 
    [super viewWillDisappear:animated]; 

    [self.navigationController setNavigationBarHidden:NO]; 
} 

或嘗試這樣的：

- (void)viewWillAppear:(BOOL)animated 
{ 
    [self.navigationController setNavigationBarHidden:YES animated:animated]; 
    [super viewWillAppear:animated]; 
} 

- (void)viewWillDisappear:(BOOL)animated 
{ 
    [self.navigationController setNavigationBarHidden:NO animated:animated]; 
    [super viewWillDisappear:animated]; 
} 

Answer 2

在VC2控制器把這個 - viewDidLoad中

[self.navigationController setNavigationBarHidden:NO]; 

在VC1控制器把這個-viewDidLoad

[self.navigationController setNavigationBarHidden:YES]; 

然後VC1增加，這也

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 
    [self.navigationController setNavigationBarHidden:YES]; 
} 

我希望這將是對你有幫助...