NSSet和NSMutableSet - By吴帮雷

NSSet *set = [NSSet setWithObjects:@"25",@"age",@"张三",@"name",@"男",nil];
        NSSet *set1 = [NSSet setWithObjects:@"25",@"age",@"张三",@"name",@"男",@"性别",nil];
        
        NSLog(@"set count:%lu", [set count]);
        //判断是否含有age字符串
        if([set containsObject:@"age"]) {
            NSLog(@"set包含age");
        }
        //判断set 是否等于set1
        if ([set isEqualToSet:set1]) {
            NSLog(@"set 等于 set1");
        }
        //判断set是否是否是set1的子集合
        if ([set isSubsetOfSet:set1]) {
            NSLog(@"set isSubsetOfSet set1");
        }
        //获取所有set对象
        NSArray *array = [set allObjects];
        NSLog(@"array:%@", array);
        
        //迭代遍历
        NSEnumerator *enumerator = [set objectEnumerator];
        for (NSObject *object in enumerator) {
            NSLog(@"set1里的对象:%@", object);
        }

NSMutableSet *muSet = [NSMutableSet setWithCapacity:6];
        [muSet addObject:@"对象1"];
        NSSet *set = [NSSet setWithObjects:@"对象2",@"对象3", @"被企鹅咬了一口", nil];
        //添加set数据
        [muSet unionSet:set];
        for (NSObject *object in muSet) {
            NSLog(@"all nuSet:%@",object);
        }
        NSSet *set1 = [NSSet setWithObjects:@"对象2",@"对象3", nil];
        
        //在muSet中删除包含set1总数据
        [muSet minusSet:set1];
        for (NSObject *object in muSet) { 
            NSLog(@"after minusSet:%@",object);