使用iAd的应用程序是否与旧iOS兼容 [英] Are Apps using iAd compatible with older iOS

问题描述

我可以将UIBannerViewDelegate协议添加到我的UIViewController子类中，同时保持与iOS 4之前的设备兼容吗？

Can I add the UIBannerViewDelegate protocol to my UIViewController subclass while remaining compatible with pre-iOS 4 devices?

这不是重复，问题与委托协议。

This is NOT a duplicate, the question is specifically related to the delegate protocol.

推荐答案

如果您弱化链接iAd框架，您将不会遇到符合控制器类的问题ADBannerViewDelegate协议。当然，您需要以编程方式添加ADBannerView（如果它存在于正在运行的操作系统上）或以其他方式为3.x与4.x加载不同的Nib文件。

If you weak-link the iAd framework, you will encounter no issues with a controller class that conforms to the ADBannerViewDelegate protocol. You will, of course, need to add the ADBannerView programmatically (if it exists on the running OS) or otherwise load a different Nib file for 3.x vs. 4.x.

即使iPhone OS 3.x中没有ADBannerViewDelegate协议，我刚刚测试过，如果在旧版操作系统中加载了符合它的类，则不会丢失错误符号。

Even though there is no ADBannerViewDelegate protocol in iPhone OS 3.x, I just tested and no errors are thrown for missing symbols if a class that conforms to it is loaded in that older OS.

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