我有一个很长的Xcode项目，它有很多空行，这让我很难在项目中导航。是否有任何快捷键可以从所选代码中删除空行？[inboxmessagesarrayremoveAllObjects];[checkimageArrayremoveAllObjects];NSMutableDictionary*callDict=[[NSMutableDictionaryalloc]init];[callDictsetObject:@"messages-getModuleMessages"forKey:@"call"];[callDictsetObject:FB_API_KEYforKey:@"access