代码消除警告常用命令语句

1. 方法弃用告警

#pragma clang diagnostic push   
#pragma clang diagnostic ignored "-Wdeprecated-declarations"  
   //  
#pragma clang diagnostic pop

2. 不兼容指针类型

#pragma clang diagnostic push   
#pragma clang diagnostic ignored "-Wincompatible-pointer-types"  
   //  
#pragma clang diagnostic pop

3. 循环引用

#pragma clang diagnostic push  
#pragma clang diagnostic ignored "-Warc-retain-cycles" 
    self.completionBlock = ^ {  
        ...  
    };  
#pragma clang diagnostic pop

4. 未使用变量

#pragma clang diagnostic push   
#pragma clang diagnostic ignored "-Wunused-variable"  
    int a;   
#pragma clang diagnostic pop

5. 未使用default

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wcovered-switch-default"
//    switch (style) {
//        case UITableViewCellStyleDefault:
//        case UITableViewCellStyleValue1:
//        case UITableViewCellStyleValue2:
//        case UITableViewCellStyleSubtitle:
//            // ...
//        default:
//            return;
//    }
#pragma clang diagnostic pop

6. -This block declaration is not a prototype

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wstrict-prototypes"

typedef void (^UpdateSwichBtnBlock)();

#pragma clang diagnostic pop

7. deprecated 警告消除

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
这里写出现警告的代码

#pragma clang diagnostic pop

8. Empty paragraph passed to '@xxx' command

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdocumentation"
//
要去除警告的代码
//
#pragma clang diagnostic pop

9. incompatible pointer types assigning to 'MyArrayList*'from 'NSMutableArray'

加入强制转换(MyArrayList*)

10. Implicit conversion from enumeration type 'UIInterfaceOrientation' to different enumeration type 'UIDeviceOrientation'

类型不匹配。跳到出错的那一行，UIInterfaceOrientation强制转换为UIDeviceOrientation。