摘要：
Xcode 7.2真机运行出现的问题： The identity used to sign the executable is no longer valid. Please verify that your device’s clock is properly set, and that your 阅读全文
摘要：
1.Create a pch , call name is project+xxx.pch For example: DuoME-PrefixHeader.pch 2.在project——》Build Settings——》search Prefix Header ——》 把Precompile P 阅读全文