App Delegate - 页面控制器错误

Question

我不确定我在下面的陈述中做错了什么。我已经为我的项目添加了一个页面视图控制器，但是当我构建并运行该项目时，我得到了一个＆＃39; bool＆＃39;错误。这是代码：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.

    UIApplication.sharedApplication().setStatusBarStyle(UIStatusBarStyle.LightContent, animated: true)

    let pageControl = UIPageControl.appearance()
    pageControl.pageIndicatorTintColor = UIColor.lightGrayColor()
    pageControl.currentPageIndicatorTintColor = UIColor.whiteColor()
}

Answer 1

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.

    UIApplication.sharedApplication().setStatusBarStyle(UIStatusBarStyle.LightContent, animated: true)

    let pageControl = UIPageControl.appearance()
    pageControl.pageIndicatorTintColor = UIColor.lightGrayColor()
    pageControl.currentPageIndicatorTintColor = UIColor.whiteColor()
    return true
}

Answer 2

您尚未返回声明，您需要返回true或false。我想你忘记了return true。请尝试使用以下代码：

    let pageControl = UIPageControl.appearance()
    pageControl.pageIndicatorTintColor = UIColor.lightGrayColor()
    pageControl.currentPageIndicatorTintColor = UIColor.whiteColor()

    return true

希望有所帮助！