从C＃Unity中的另一个事件处理程序创建回调方法

Question

We can easily make a callback method in Unity like this:

private void SimpleCallbak(Action<bool> onTaskReady ) {

        // do something...
        onTaskReady(true);
    }

How do fire the callback onAdReady when HandleInterstitialLoaded event handler fire:

private void RequestInterstitialWithCallbak(Action<bool> onAdReady ) {

        interstitial = new InterstitialAd("ca-app-pub-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
        interstitial.OnAdLoaded += HandleInterstitialLoaded;
        interstitial.LoadAd(new AdRequest.Builder().Build());

        onAdReady(true); //???????????
    }

    public void HandleInterstitialLoaded(object sender, EventArgs args) {
        Debug.Log("HandleInterstitialLoaded event received.");
        onAdReady(true); //???????????
    }

Answer 1

A simple modification of your code, replacing the callback method with a lambda:

private void RequestInterstitialWithCallbak(Action<bool> onAdReady ) {
    interstitial = new InterstitialAd("ca-app-pub-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
    interstitial.OnAdLoaded += (sender, args) => {
        Debug.Log("HandleInterstitialLoaded event received.");
        onAdReady(true);
    };
    interstitial.LoadAd(new AdRequest.Builder().Build());
}

Here sender and args use type inference, allowing us to shorten the code a little bit by omitting the type specifiers

For more information on using lambdas for callbacks you can read the official documentation on Delegates and lambdas and Lambda Expressions

Answer 2

I guess ur in rush to get an answer, this is based on UnholySheep' comment:

private Action<bool> _onAdReady;

private void RequestInterstitialWithCallbak(Action<bool> onAdReady)
{
    _onAdReady = onAdReady;
    interstitial = new InterstitialAd("ca-app-pub-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
    interstitial.OnAdLoaded += HandleInterstitialLoaded;
    interstitial.LoadAd(new AdRequest.Builder().Build());

    _onAdReady?.Invoke(true); //???????????
}

public void HandleInterstitialLoaded(object sender, EventArgs args)
{
    Debug.Log("HandleInterstitialLoaded event received.");
    _onAdReady?.Invoke(true); //???????????
}