在TabBarController之前加載歡迎屏幕（初始屏幕）

Question

在我的基於TabBar的iPhone應用程序中，我想在實際應用程序加載之前顯示一個全屏歡迎頁面（包含一些日誌），如何從xib文件加載UIView作爲歡迎屏幕，然後從那裏我可以加載我的基於TabBar的應用程序。

由於提前，

Answer 1

這樣做將是正常加載您的標籤欄的應用程序，但使用標籤欄控制器的presentModalViewController:animated:方法來顯示在其上的圖控制器（在application:didFinishLaunching:）正確方法：

SplashScreenController *controller = [[SplashScreenController alloc] initWithNibNamed:nil bundle:nil]; 
[self.tabBarController presentModalViewController:controller animated:YES]; 
[controller release]; 

我「通常會放閃屏上的‘解僱’按鈕，但你也可以做這樣的事情：

[self.tabBarController performSelector:@selector(dismissModalViewControllerAnimated:) withObject:YES afterDelay:2.0]; 

將在發射呈現視圖控制器和兩個秒鐘後關閉它。將YES改爲NOs以避免從底部向上滑動動畫。

Answer 2

我在的appDelegate一個子視圖添加到主窗口：

LoginViewController *loginController = [[LoginViewController alloc] initWithNibName:@"LoginViewController" 
                      bundle: nil]; 
[window addSubview: [loginController view]]; 

然後在LoginViewController，當我準備好解僱的視圖（顯示你的tabController說）我做的：

UIView *currentView = self.view; 
UIView *theWindow = [currentView superview]; 

[currentView removeFromSuperview]; 

CATransition *animation = [CATransition animation]; 
[animation setDuration:0.5]; 
[animation setType:kCATransitionPush]; 
[animation setSubtype:kCATransitionFromBottom]; 
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; 

[[theWindow layer] addAnimation:animation forKey:@"SwitchToView1"]; 

Answer 3

在我的標籤欄應用程序之一，我顯示啓動畫面像這樣：

在我的應用程序委託對象，我開始在didFinishLaunchingWithOptions顯示它

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
    splashScreenVC = [[SplashScreenViewController alloc] initWithNibName:@"SplashScreenView" bundle:nil]; 

    [window addSubview:splashScreenVC.view]; 
    [window makeKeyAndVisible]; 

    //set delay before showing new screen 
    [NSTimer scheduledTimerWithTimeInterval:1.5f target:self selector:@selector(onSlashScreenExpired:) userInfo:nil repeats:NO]; 

    return YES; 
} 

的onSlashScreenExpired方法是這樣的：

- (void)onSlashScreenExpired:(id)userInfo{ 
    [splashScreenVC.view removeFromSuperview]; 
    [splashScreenVC release]; 

    // At this point, create the tab bar controller and display it 
} 

我相當肯定我鵝卵石這一起從SO另一個問題，但我找不到它。

Answer 4

的UI準則說，你不應該有一個啓動畫面 - 你應該呈現視圖，用戶將看到當應用程序加載，沒有任何數據在它的虛擬版本：

看到Apple iPhone UI Guidelines on Launch Images的細節 - 這裏是一個摘錄：

爲了提高用戶的在 啓動應用程序的經驗，你應該提供 發射圖像。啓動圖像看起來 與您的 應用程序顯示的第一個屏幕非常相似。當 用戶點擊 主屏幕上的應用程序圖標時，iPhone OS 立即顯示此圖像。只要準備好 ，您的應用程序就會顯示其 第一個屏幕，替換啓動 佔位符圖像。

重要的是要強調， 提供啓動圖像的原因是爲了提高用戶體驗 ;它不是一個 機會提供：

• 「應用入行經歷，」 如閃屏
• 一個關於 窗口
• 品牌元素，除非他們 是一個靜態部分的 應用程序的第一個屏幕

Answer 5

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{  
    splashView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"image01.png"]]; 
    splashView.frame=CGRectMake(0,21,320,460); 
    [self.window makeKeyAndVisible]; 
    [self.window addSubview:splashView]; 


    [self performSelector:@selector(splashremove) withObject:nil afterDelay:10.5]; 
    [self performSelector:@selector(sixthimage) withObject:nil afterDelay:9.0]; 
    [self performSelector:@selector(fifthimage) withObject:nil afterDelay:7.5]; 
    [self performSelector:@selector(fourthimage) withObject:nil afterDelay:6.0]; 
    [self performSelector:@selector(thirdimage) withObject:nil afterDelay:4.5]; 
    [self performSelector:@selector(secondimage) withObject:nil afterDelay:3.0]; 
    [self performSelector:@selector(firstimage) withObject:nil afterDelay:1.5]; 


    return YES; 
} 

-(void)firstimage 
{ 
    NSLog(@"Inside first image"); 
    splashView.image=[UIImage imageNamed:@"image01.png"]; 
} 


-(void)secondimage 
{ 
    NSLog(@"Inside second image"); 
    splashView.image=[UIImage imageNamed:@"image02.png"]; 
} 



-(void)thirdimage 
{ 
    NSLog(@"Inside third image"); 
    splashView.image=[UIImage imageNamed:@"image03.png"]; 
} 



-(void)fourthimage 
{ 
    NSLog(@"Inside fourth image"); 
    splashView.image=[UIImage imageNamed:@"image04.png"]; 
} 



-(void)fifthimage 
{ 
    NSLog(@"Inside fifth image"); 
    splashView.image=[UIImage imageNamed:@"image05.png"]; 
} 



-(void)sixthimage 
{ 
    NSLog(@"Inside sixth image"); 
    splashView.image=[UIImage imageNamed:@"image06.png"]; 


} 

-(void)splashremove 
{ 
    NSLog(@"Inside splashremove image"); 

    [splashView removeFromSuperview]; 
    [splashView release]; 

    [self.window addSubview:tabBarController.view]; 
    [self.window makeKeyAndVisible]; 

}