如何在視圖完全推入視圖後使tabBar生成動畫？

Question

我試圖模仿TweetBot/NetBot動畫tabBar後，從帳戶tableView的操作推動。當視圖被完全推入時，taBar纔會從底部開始生成動畫。我試過各種各樣的隱藏/放映方法，並且在「演出」部分看起來都失敗了。

有沒有人有這樣的建議？

Answer 1

首先，我認爲你不使用UITabViewController，因爲它不能被推入到UINavigationController棧中，所以我認爲你使用的是嵌入UIViewController的獨立UITabBar。這個假設是正確的嗎？

嘗試使用此代碼（我沒有嘗試過）。

- (void)viewDidAppear { 
    [super viewDidAppear]; 

    // Calls showTabBar method after SOME_DELAY. You can also call directly [self showTabBar] if you want zero delay. 
    [self performSelector:@selector(showTabBar) afterDelay:SOME_DELAY]; 
} 

- (void)showTabBar { 
    // Before the animation begins, your UITabBar must be outside the view controller's view frame. 
    CGRect tabBarFrame = CGRectMake(0, 
            CGRectGetHeight(self.view.bounds), 
            CGRectGetWidth(self.view.bounds), 
            CGRectGetHeight(self.tabBar.frame); 
    self.tabBar.frame = tabBarFrame; 

    // Let's start with the animation, setting a new frame for tab bar inside an animation block 
    [UIView animateWithDuration:ANIMATION_DURATION animations:^{ 
     // Change origin Y. It assumes that the height of self.tabBar is right, otherwise put the height you want instead of CGRectGetHeight(self.tabBar.frame). 
     tabBarFrame.origin.y = CGRectGetHeight(self.view.bounds) - CGRectGetHeight(self.tabBar.frame); 

     self.tabBar.frame = tabBarFrame; 
    }]; 
}