这个问题在这里已经有了答案:关闭10年前。PossibleDuplicate:CaretinobjectiveCObjective-C中的^符号是什么意思？代码:GreeRequestServicePopup*requestPopup=[GreeRequestServicePopuppopup];requestPopup.parameters=parameters;requestPopup.willLaunchBlock=^(idaSender){[[NSNotificationCenterdefaultCenter]postNotificationName:@"request_ser