iPhone OS低于4 ==>正在测试iAd？

Question

I implemented iad to my app (sdk 4), i set the target to be able to run OS 3 and higher now i need to test and make sure that devices with OS 4 lower won't crash because of iAd. Is there a way to go back to iphone OS 3.2 to test this. Where can i download it, apple has removed it from their website.

Answer 1

当您安装sdk 4时，sdk 3.2应该仍然存在，因为那是单独的iPad OS，在代码编辑器的左上角，只需选择下拉菜单并选择3.2（设备或模拟器）