Question

所以我知道Default.png可用于iPhone应用程序中的启动画面，但我发现它看起来不专业，因为一旦应用程序完成加载就没有动画。

所以我试图添加一个会淡出的闪屏，然后转到上一个上一个视图。

互联网上的大多数示例都倾向于使用addSubview的旧方式。我如何将其添加到我的故事板应用程序中。

当前代码（时间错误，因为我不确定它最初是否正常工作）

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    splashView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default2.png"]];
    splashView.frame = CGRectMake(0, 0, 324, 480);
    [_window addSubview:splashView];
    [_window bringSubviewToFront:splashView];
    [_window makeKeyAndVisible];

    [self performSelector:@selector(removeSplash) withObject:nil afterDelay:1500.2];
    return YES;
}

-(void)removeSplash;
{
    [UIView animateWithDuration:1.0 animations:^{self.splashView.alpha = 0.0;} completion:^(BOOL finished){ [splashView removeFromSuperview]; }];
    [splashScreen release];
}

Answer 1

除了Guntis Treulands之外，我还有另一种方法可以在不将动画代码移出- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions方法的情况下完成此操作。

只需将您的splashView直接添加到_window.rootViewController.view。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    UIImage *splashImage = [UIImage autoAdjustImageNamed:@"Default.png"];
    UIImageView *splashImageView = [[UIImageView alloc] initWithImage:splashImage];
    [self.window.rootViewController.view addSubview:splashImageView];
    [self.window.rootViewController.view bringSubviewToFront:splashImageView];
    [UIView animateWithDuration:1.5f
                          delay:2.0f
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         splashImageView.alpha = .0f;
                         CGFloat x = -60.0f;
                         CGFloat y = -120.0f;
                         splashImageView.frame = CGRectMake(x,
                                                            y,
                                                            splashImageView.frame.size.width-2*x,
                                                            splashImageView.frame.size.height-2*y);
                     } completion:^(BOOL finished){
                         if (finished) {
                             [splashImageView removeFromSuperview];
                         }
                     }];

    return YES;
}

Answer 2

在你的情况下，我仍然会将其添加为子视图，但始终将其保留为窗口的顶级子视图。当它是alpha == 0时，它将停止接收触摸。所以......没有理由每次想要淡出它时都要释放它。

就我而言 - 客户希望每次应用程序最大化或打开时都能看到启动画面，所以我也这样做了：

- (void)applicationDidEnterBackground:(UIApplication *)application 
{
    extraSplashScreen.alpha = 1;  //when it goes in background - set splash screen visible.
}

- (void)applicationDidBecomeActive:(UIApplication *)application 
{ 
    [self fadeOutSplash]; //initiate fade out.
}

我的fadeOutSplash函数看起来像这样（以防万一）：

- (void)fadeOutSplash
{
    [UIView beginAnimations:nil context:NULL];  

    [UIView setAnimationDelegate:self];

    [UIView setAnimationCurve:UIViewAnimationCurveEaseIn];   

    [UIView setAnimationDuration:0.3];

    [UIView setAnimationDelay:0.5];

    extraSplashScreen.alpha = 0;

    [UIView commitAnimations];
}

希望有所帮助。

使用Storyboard延迟的iPhone应用程序中的启动画面

2 个答案: