Question

我需要帮助才能在iphone上启动图像。在xcode的项目设置中，有一个添加启动图像的选项。我添加它并显示2秒钟...... 我希望它更多...... 我怎么能改变它？谢谢:)）

Answer 1

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

  /*this will pause main thread for x interval seconds. 
  put on the top of application:didFinishLaunchingWithOptions, so it will not 
  proceed to show window until sleep interval is finished.*/

    [NSThread sleepForTimeInterval:2]; //add 2 seconds longer.
   //other code....
}

Answer 2

您也可以通过在

中应用以下代码来完成此操作

 -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:  (NSDictionary *)launchOptions
 {
       [NSThread sleepForTimeInterval:2.0]; // Used For Showing Splash Screen for More Time
 }

首先创建viewcontroller，将图像设置为启动画面/ Launc图像..

在方法applicationDidFinishLaunching中显示该视图：使用动画：否

并在您的演示

的另一个视图中写下以下代码

-(void) viewWillAppear:(BOOL)animated
{

        [self performSelector:@selector(dismiss1) withObject:nil afterDelay:5.0f];
        [super viewWillAppear:animated];

}



-(void) dismiss1
{

         [self dismissModalViewControllerAnimated:NO];

}

如果您想在每次应用打开时显示启动画面，请在applicationDidBecomeActive方法中显示启动画面视图控制器

Answer 3

您可以使用sleep()方法。

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    sleep(10);
    return YES;
}

Answer 4

启动图像是为了让您的应用显示真正的响应，并且应该是您的UI之前的任何项目的快照，如tabBars等.Apple并不真的希望您将它们用作启动画面。

也就是说，很多人都会这样做，并且要实现这一结果，您的应用代表需要在启动图片时在屏幕上显示相同的图片，然后您可以延迟使用performSelector:withObject:afterDelay:启动主应用

Answer 5

在Swift中

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        Thread.sleep(forTimeInterval: 2.0)
        return true
}

Answer 6

制作默认视图...使用相同的默认图片制作图片视图...然后使用[self performselector methods

在特定时间后启动新视图（主应用）

Answer 7

您可以在第一个加载的视图中放置UIImageView。比如，在FirstViewController的viewDidLoad中

-(void)viewDidLoad{
 appLogo = [UIImageView alloc]initWithImage:[UIImage imageNamed:@"companyLogo.png"]];
 [appLogo setFrame:CGRectMake..... ];
 self.view addSubView:appLogo];

 [self performSelector:@selector(hideAppLogo) withObject:nil afterDelay:1000000 :) ];
}

-(void)hideAppLogo{
 [appLogo setHidden:YES];
 //let the user use your app now!
}

Answer 8

你可以通过在将窗口分配给rootviewController之前在窗口中添加“Default.png”的backgroundColor来实现这一点，并在几秒钟之后将rootviewController分配给窗口并将窗口背景颜色设置为默认值。

像这样 -

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
 [self performSelector:@selector(openLoginScreen) withObject:nil afterDelay:0.5];
 self.window.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"Default.png"]]; 
 [self.window makeKeyAndVisible];
}

-(void)openLoginScreen{
self.window = [UINavigation .... "YOUR ROOT VIEWCONTROLLER"];     
}

使启动图像显示更长的xcode

8 个答案: