兼容性问题iAd Banner？

Question

嗨，我在测试aap中使用了iAd Banner。它可以在4.0 SDK上正常运行，但是当我使用SDK 3.0或更低版本时，它崩溃了，但没有显示任何内容。我读到弱链接会帮助我解决这个问题，但是按照我的想法，它会崩溃当它找不到框架时。我什至不知道如何使用弱链接。请帮助我解决此问题。

Answer 1

When allocating your ADBannerView, first check to see if the OS version supports it:

if(NSClassFromString(@"AdBannerView")) {
     //Allocate ADBannerView here
}

Then in the build settings of your target, add -weak_framework iAd to Other Linker Flags in the Linking section.

Edited as per Jonathans recommendation.

Answer 2

Expand the Targets directory, right click , and choose “Get Info”. Click the Build tab, make sure “All Configurations” is selected, and navigate to Linking\\Other Linker Flags. Double click on that entry, click the “+” button, and type “-weak_framework iAd”.