可能重复:
在使用 Xcode 4.2 和 iOS 5 SDK 时是否可以针对较旧的 iOS 版本?
我开发了一个适用于 iPhone 4 (iOS 4.3 & 5) 的应用程序(在开发过程中使用).现在我尝试在 3GS(iOS 4.3.3)和 3G(iOS 4.2)上进行测试.但应用程序不会加载到这些设备中.尝试部署到设备时,我可以在控制台上看到以下消息.
I have developed an app which works on iPhone 4 (iOS 4.3 & 5) (which used during developing). Now I have tried to test on 3GS (iOS 4.3.3) and 3G(iOS 4.2). But app does not load into these devices. I can see following messages on consol when try to deploy to device.
Sat Jan 1 17:27:38 unknown lockdownd[16] <Error>: 2ff68000 handle_connection:
Could not receive USB message #6 from Xcode. Killing connection
Sat Jan 1 17:27:38 unknown com.apple.mobile.lockdown[16] <Notice>: Could not
receive size of message
我已经在 Xcode 4.0.2 和 4.2 beta 上进行了测试.重新启动设备和 MAC 但仍然相同.有人可以知道这个问题吗?谢谢
I have tested on Xcode 4.0.2 as well as 4.2 beta. Restarted devices and MAC but still same. Can anybody know about this issue? Thanks
这可能有多种原因.到目前为止,这是pople遇到的案例:
This can come for various reasons. Until now this is are the cases pople have encountered:
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