是否有可能爲單擊事件調用PopViewControllerAnimated和PushViewController

Question

在按鈕單擊操作上，我想同時銷燬當前屏幕，我想將其導航到主屏幕而不是前一個屏幕。 我試圖通過將此代碼做到這一點，但沒有奏效。

-(IBAction)  sel_goback 
{ 
    [self.navigationController popViewControllerAnimated:YES]; 
    Home1ViewController *HM = [[Home1ViewController alloc] initWithNibName:@"Home1ViewController" bundle:nil]; 
    [self.navigationController pushViewController:HM animated:YES]; 
    [HM release]; 

} 

Answer 1

如果self爲頂視圖控制器，然後通過返回popViewControllerAnimated:時間，self.navigationController已被設置爲零。試試這個：

-(IBAction)  sel_goback 
{ 
    UINavigationController *nav = self.navigationController; 
    [nav popViewControllerAnimated:YES]; 
    Home1ViewController *HM = [[Home1ViewController alloc] initWithNibName:@"Home1ViewController" bundle:nil]; 
    [nav pushViewController:HM animated:YES]; 
    [HM release]; 

} 

但是，「主屏幕」聽起來像是已經在您的導航控制器的堆棧上的東西。也許你真正想要的是這樣的：

-(IBAction)  sel_goback 
{ 
    UINavigationController *nav = [self.navigationController]; 
    while (nav.viewControllers.count > 1 && ![nav.topViewController isKindOfClass:[Home1ViewController class]]) 
     [nav popViewControllerAnimated:YES]; 

    if (![nav.topViewController isKindOfClass:[Home1ViewController class]]) { 
     Home1ViewController *home = [[Home1ViewController alloc] initWithNibName:@"Home1ViewController" bundle:nil]; 
     [nav setViewControllers:[NSArray arrayWithObject:home] animated:YES]; 
    } 
}