1.方法弃用告警
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
[TestFlight setDeviceIdentifier:[[UIDevice currentDevice] uniqueIdentifier]];
#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.retain cycle
// completionBlock is manually nilled out in AFURLConnectionOperation to break the retain cycle.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-retain-cycles"
self.completionBlock = ^ {
...
};
#pragma clang diagnostic pop
4.未使用变量
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-variable"
int a;
#pragma clang diagnostic pop
更多内容，请查阅
http://clang.llvm.org/docs/UsersManual.html#diagnostics_pragmas
http://nshipster.com/pragma/
http://www.cocoachina.com/applenews/devnews/2013/0731/6707.html
