将字符串按照单词逆序

来源：互联网发布：php 菜鸟教程编辑：程序博客网时间：2024/05/16 13:46

/*2.将字符串按照单词逆序  输入一段字符串，已知字符串只由字母和空格构成，将字符串按照单词逆序 传入@"welcome to beijing" 返回 @"beijing to welcome" */+ (NSString *)reverseWordsInString:(NSString *)str//{//    NSArray * arr= [str componentsSeparatedByString:@" "];//    NSArray * arr1=[[arr reverseObjectEnumerator]allObjects];//    NSString * str1 = [arr1 componentsJoinedByString:@" "];//    return  str1;//[arr copy];//}//{//    NSArray * array = [str componentsSeparatedByString:@" "];//    NSArray * array1 = [[array reverseObjectEnumerator]allObjects];//    NSString * str1 = [array1 componentsJoinedByString:@" "];//    return  str1;//}{    NSArray * array = [str componentsSeparatedByString:@" "];    NSArray * array1 = [[array reverseObjectEnumerator]allObjects];    NSString * str1 = [array1 componentsJoinedByString:@" "];    return  str1;}

0 0