讓編譯器對一些警告閉嘴

一、方法啓用告警

    #pragma clang diagnostic push
    #pragma clang diagnostic ignored "-Wdeprecated-declarations"
    //code這裏插入相關的代碼

    #pragma clang diagnostic pop

 

2.不兼容指針類型

     #pragma clang diagnostic push

     #pragma clang diagnostic ignored "-Wincompatible-pointer-types"

     //code這裏插入相關的代碼

     #pragma clang diagnostic pop

3.retain cycle

     #pragma clang diagnostic push

     #pragma clang diagnostic ignored "-Warc-retain-cycles"

     //code這裏插入相關的代碼

     #pragma clang diagnostic pop

4.未使用變量

     #pragma clang diagnostic push

     #pragma clang diagnostic ignored "--Wunused-variable"

     //code這裏插入相關的代碼

     #pragma clang diagnostic pop

5.selector中使用了不存在的方法名（在使用反射機制經過類名建立類對象的時候會須要的）

     #pragma clang diagnostic push

     #pragma clang diagnostic ignored "-Wundeclared-selector"

     //code這裏插入相關的代碼

     #pragma clang diagnostic pop

 

 

 

更多內容，請查閱

http://clang.llvm.org/docs/UsersManual.html#diagnostics_pragmas

http://nshipster.com/pragma/

http://www.cocoachina.com/applenews/devnews/2013/0731/6707.html