xcode 来自 Storyboard 的 iOS Swift 启动画面
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/31114418/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
iOS Swift splash screen from Storyboard
提问by JibW
In my iPhone app need to display a splash screen (displays company logo and some info) for 2-3 seconds before load the first page.
在我的 iPhone 应用程序中，需要在加载第一页之前显示启动画面（显示公司徽标和一些信息）2-3 秒。
Also the app needs to decide which page should load as the first page in here (according the 'initial setup completion' level by the user).
此外，应用程序需要决定哪个页面应作为此处的第一页加载（根据用户的“初始设置完成”级别）。
I am using 'Swift' as the programing language and 'Universal StoryBoard' to design interfaces...
我使用“Swift”作为编程语言，使用“Universal StoryBoard”来设计界面……
I have seleted the Main.storyboard as the Launch Screen File. In the ViewController class have implemented following logic
我已选择 Main.storyboard 作为启动屏幕文件。在 ViewController 类中实现了以下逻辑
override func viewDidAppear(animated: Bool) {
NSLog("Before sleep...")
sleep(2)
NSLog("After sleep...")
self.controllNavigation()
}
func controllNavigation() -> Void {
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
var nextViewController
if (Condition1)
{
nextViewController = storyBoard.instantiateViewControllerWithIdentifier("MainMenu") as! MainMenuViewController
}
else
{
nextViewController = storyBoard.instantiateViewControllerWithIdentifier("UserSetup") as! UserSetupViewController
}
self.presentViewController(nextViewController, animated: true, completion: nil)
}
All works ok but While waiting with sleep(2), refresh page sort of a thing happens. I am not sure if this is the best way to do. Like to hear ideas. Thanks
一切正常，但在等待时sleep(2)，刷新页面发生了一些事情。我不确定这是否是最好的方法。喜欢听想法。谢谢
回答by Kapil Choubisa
Use the delay in app delegate instead of viewController's viewDidAppear. Use as:
在应用程序委托中使用延迟而不是 viewController 的 viewDidAppear。用于：
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
NSLog("Before Sleep");
sleep(2);
NSLog("After sleep");
return true
}
Doing this will allow your splash screen to stay till 2 seconds and then you can use following in your view controller:
这样做将使您的启动画面保持 2 秒，然后您可以在视图控制器中使用以下内容：
override func viewDidAppear(animated: Bool) {
self.controllNavigation()
}
Hope this helps :)
希望这可以帮助 ：）
回答by David T
I came across similar answers which mentioned sleep(), however it doesn't seem appropriate to use as it blocks the main thread.
我遇到了提到的类似答案sleep()，但是它似乎不适合使用，因为它会阻塞主线程。
I came up with this solution if you are using the default LaunchScreen.storyboard in Xcode 7.2:
如果您在 Xcode 7.2 中使用默认 LaunchScreen.storyboard，我想出了这个解决方案：
func showLaunchScreen() {
let launchScreen = UIStoryboard(name: "LaunchScreen", bundle: nil)
let launchView = launchScreen.instantiateInitialViewController()
self.view.addSubview(launchView!.view)
let timeDelay = dispatch_time(DISPATCH_TIME_NOW, Int64(2 * Double(NSEC_PER_SEC)))
dispatch_after(timeDelay, dispatch_get_main_queue()) {
UIView.animateWithDuration(0.5, animations: { _ in
launchView?.view.alpha = 0.0
}) { _ in
launchView!.view.removeFromSuperview()
}
}
This will show the launch screen for another 2 seconds, then fade it out over 0.5 seconds. You can call you other function to load the 'default' VC in the completion handler.
这将再显示启动屏幕 2 秒，然后在 0.5 秒内淡出。您可以调用其他函数以在完成处理程序中加载“默认”VC。
回答by Jorge Sánchez
I have solved this issue with this:
我已经解决了这个问题：
On my project I set the desired storyboard of splash (in my case Splash.storyboard) as Default Screen -> Targets/ (your target)/ Info/ Launch Screen Interface File Base Name.
在我的项目中，我将所需的初始故事板（在我的情况下为 Splash.storyboard）设置为默认屏幕 -> 目标/（您的目标）/信息/启动屏幕界面文件基名。
When you've done that, you can insert your logic on method "func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {} " placed on AppDelegate.swift .
完成后，您可以在方法“func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {}”上插入逻辑，放在 AppDelegate.swift 上。
If you want to make clean code, you can insert all your navigation related methods on another Class, and call them from AppDelegate.swift .
如果你想编写干净的代码，你可以将所有与导航相关的方法插入另一个类，并从 AppDelegate.swift 调用它们。
With this solution, the splash is visible only the required time, and when it finish, you can navigate to the screen you need.
使用此解决方案，飞溅仅在所需的时间内可见，完成后，您可以导航到所需的屏幕。
回答by Xcodian Solangi
Swift 4 Update 100% working
Swift 4 更新 100% 工作
Just write one line of code
Thread.sleep(forTimeInterval: 3.0)
in the method of didfinishLauching....in appdelegateclass.
在类Thread.sleep(forTimeInterval: 3.0)
的方法中写一行代码即可
。didfinishLauching....appdelegate
Example
例子
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
Thread.sleep(forTimeInterval: 3.0)
// Override point for customization after application launch.
return true
}
