如何修复cordova ios中闪屏后的while screen？

<preference name="SplashScreen" value="screen" />
<preference name="SplashScreenDelay" value="3000" />

#import "CDVSplashScreen.h"

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

    // 显示启动页
    self.viewController.useSplashScreen = YES;
    CDVSplashScreen* splashScreen = [CDVSplashScreen new];
    [splashScreen show];
    
    // ...
    
    return YES;
}

- (void)onAppReady
{
    // 隐藏启动页
    CDVSplashScreen* splashScreen = [CDVSplashScreen new];
    [splashScreen hide];
}

cordova platform rm ios
cordova platform add ios