想要给项目添加开屏广告，但是没有广点通的相关插件，所以只能从原生那里入手。
想法是在进入flutter界面前，添加一个开屏，开屏结束后进入flutter
根据 https://github.com/gdtmobsdk/GDTMobSDK 配置好sdk后
仿照 https://github.com/gdtmobsdk/GDTMobSDK/blob/v4.11.1/GDTMobSample-Swift/AppDelegate.swift 写了自己的AppDelegate.swift 如下

出现的问题是，能够正常显示开屏广告，显示完毕后也能进入flutter，但是flutter所有的第三方插件全部失效，报错是没有找到插件。

AppDelegate.swift

import UIKit
import Flutter


@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
    var splash: GDTSplashAd!
    var flutterViewController: FlutterViewController?
    var flutterEngine : FlutterEngine?;


  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {

    GeneratedPluginRegistrant.register(with: self)

    self.flutterViewController = FlutterViewController()

    window = UIWindow.init(frame: UIScreen.main.bounds)
    let rootViewController = GDTNavigationController.init(rootViewController: self.flutterViewController!)
    rootViewController.navigationBar.isHidden = true
    rootViewController.navigationBar.isTranslucent = true

    window?.rootViewController = rootViewController
    window.makeKeyAndVisible()


    if UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.phone {
        splash = GDTSplashAd.init(appId: Constant.appID, placementId: Constant.placementID)
        splash.delegate = self as? GDTSplashAdDelegate

        var splashImage = UIImage(named: "SplashNormal-swift")
        if Util.isIphoneX() {
            splashImage = UIImage(named: "SplashX-swift")
        } else if Util.isSmallIphone() {
            splashImage = UIImage(named: "SplashSmall-swift")
        }
        splash.backgroundImage = splashImage
        splash.fetchDelay = 3
        splash.loadAndShow(in: window)
    }

    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
    }
}

为了方便查看贴上图片代码：

p.s flutter正常生成的代码（未改造前的）：

import UIKit
import Flutter

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

关于开发android，ios应用，使用paypal的sdk，服务器端怎么写，官方的实在看不懂？

meng_fyang

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