雙擊UIview時隱藏導航欄

Question

如何在不使用導航控制器的情況下雙擊並隱藏UIView上的單擊時顯示導航欄？還隱藏和顯示動畫？

在此先感謝。

Answer 1

UITapGestureRecognizer* tapGesture =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(your_selector)]; 
tapGesture.numberOfTapsRequired = 2; 
[self.view addGestureRecognizer:tapGesture]; 
[tapGesture release]; 

在您選擇：

-(void)your_selector{ 
    [UIView animateWithDuration:0.5 
       animations:^{ 
        bar.frame = CGRectOffset(bar.frame, 0, bar.bounds.size.height*bar.frame.origin.y<0?-1:1); 
       }]; 
} 

在此實現你只有雙觸摸會改變條狀態的事件。 不幸的是，一次沒有簡單的單觸和雙觸手勢的實現。更多的人類行爲，對你而言更容易 - 只有在雙重接觸的情況下才能工作。

XCode project - example

Answer 2

試試這個隱藏

[UIView beginAnimations:@"Hide bar animation" context:NULL]; 

[UIView setAnimationDuration:0.5]; 

navigationBar.alpha = 0.0; 

[UIView commitAnimations]; 

for showing 

[UIView beginAnimations:@"Show bar animation" context:NULL]; 

[UIView setAnimationDuration:0.5]; 

navigationBar.alpha = 1.0; 

[UIView commitAnimations]; 

但UINavigationController的太簡單......

Answer 3

你可以有一個UINavigationBar沒有導航控制器：

navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 40.0f)]; 
[navBar setDelegate:self]; 
[mainView addSubview:navBar]; 

UITapGestureRecognizer是UIGestureRecognizer具體子類，尋找單個或多個龍頭：

UITapGestureRecognizer *doubleTap =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideNavBar:)]; 
[doubleTap setNumberOfTapsRequired:2]; 
[YOURVIEW addGestureRecognizer:doubleTap]; 

UITapGestureRecognizer *singleTap =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showNavBar:)]; 
[singleTap setNumberOfTapsRequired:1]; 
[YOURVIEW addGestureRecognizer:singleTap]; 

這裏有顯示或隱藏導航欄的方法：

- (void)hideNavBar:(id)sender 
{ 
    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:1.0f]; //Animation duration in seconds 

    navBar.alpha = 0.0f; 

    [UIView commitAnimations]; 
} 

- (void)showNavBar:(id)sender 
{ 
    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:1.0f]; //Animation duration in seconds 

    navBar.alpha = 1.0f; 

    [UIView commitAnimations]; 
}