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我有一个通用的应用程序。在此应用程序中，我将介绍图像设置为启动画面。对于 iPhone，我需要设置不同的图像作为启动屏幕，而对于 iPad，我需要设置不同的图像。当我使用下面的代码时，它适用于 iphone 但不适用于 ipad。这是我的代码。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
   [self copyDatabaseIfNeeded];
   [window addSubview:navigationController.view];
   [window makeKeyAndVisible];

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
    splashViewBg = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 768, 1004)];
    splashViewBg.image = [UIImage imageNamed:@"jamil.png"];
    //splashViewBg.contentMode = UIViewContentModeScaleAspectFill;
    [window addSubview:splashViewBg];

    splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 768, 1004)];
    splashView.image = [UIImage imageNamed:@"jamil.png"];
    //splashView.contentMode = UIViewContentModeScaleAspectFill;
    splashView.alpha = 0.0f;
}
else
{
    splashViewBg = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
    splashViewBg.image = [UIImage imageNamed:@"defualt.png"];
    //splashViewBg.contentMode = UIViewContentModeScaleAspectFill;
    [window addSubview:splashViewBg];

    splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
    splashView.image = [UIImage imageNamed:@"defualt.png"];
    //splashView.contentMode = UIViewContentModeScaleAspectFill;
    splashView.alpha = 0.0f;
}

[UIView beginAnimations:@"show" context:NULL];
[UIView setAnimationDuration:1.0f];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationDelegate:self];
splashView.alpha = 1.0f;
[UIView commitAnimations];

[self performSelector:@selector(removeSplash) withObject:nil afterDelay:2.0];

[self performSelector:@selector(removeSplashBg) withObject:nil afterDelay:3.5];

return YES;
 }

 - (void) removeSplash {
   [UIView beginAnimations:@"hide" context:NULL];
   [UIView setAnimationDuration:1.0f];
   [UIView setAnimationCurve:UIViewAnimationCurveLinear];
   [UIView setAnimationDelegate:self];
   splashView.alpha = 0.0f;
  [UIView commitAnimations];
}

  - (void) removeSplashBg {
      [splashView removeFromSuperview];
      [splashViewBg removeFromSuperview];
}
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1 回答 1

2

我知道这并不能直接回答您的问题，但 Apple 的指导方针明确表示不要使用启动画面图像。强烈建议不要这样做，并且可能会为您的用户带来非常糟糕、不一致的体验。如果您必须在应用程序加载时显示屏幕，则无需编写任何代码即可。只需将图像命名为 Default.png 和 Default@2x.png。它们将自动加载并显示为闪屏。请参阅“启动图像”的文档。

于 2012-06-01T17:47:33.077 回答