pragma clang diagnostic push

pragma clang diagnostic ignored "-相關命令"

//需要操作的代碼

pragma clang diagnostic pop

1：忽略棄用的警告??
//方法棄用告警

pragma clang diagnostic push

pragma clang diagnostic ignored "-Wdeprecated-declarations"

UIAlertView *alertViewTmp = [[UIAlertView alloc]initWithTitle:@"" message:@"" delegate:nil cancelButtonTitle:@"" otherButtonTitles:@"", nil];
[alertViewTmp show];

pragma clang diagnostic pop

2：忽略不兼容指針類型??
// 不兼容指針類型

pragma clang diagnostic push

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

//

pragma clang diagnostic pop

3：循環(huán)引用??
break the retain cycle.

pragma clang diagnostic push

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

// self.completionBlock = ^ {
// ...
// };

pragma clang diagnostic pop

4：未使用變量?
// 未使用變量

pragma clang diagnostic push

pragma clang diagnostic ignored "-Wunused-variable"

int a;

pragma clang diagnostic pop

5.未使用默認??

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