IOS学习笔记二十NSSet和NSMutableSet

1、NSSet、NSMutableSet

NSSet元素无序、不能重复

NSMutableSet元素无序、不能重复,有一些向集合中增加元素的功能、删除元素.......


 
2、测试Demo

    int main(int argc, char * argv[]) {
        @autoreleasepool {
            
            NSSet *set = [NSSet setWithObjects:@"chenyu", @"hello", @"word", @"see", nil];
            set = [set setByAddingObject:@"chenxuan"];
            for (id object in set)
            {
                NSLog(@"%@", object);
            }
            NSSet *set1 = [NSSet setWithObjects:@"chenyu1", @"hello1", @"word", @"see", @"see", @"hello1", nil];
            //set和set1的并集
            NSLog(@".......");
            NSSet *s = [set setByAddingObjectsFromSet:set1];
            for (id object in s)
            {
                NSLog(@"%@", object);
            }
            //是否有交集
            NSLog(@"set1 和 set 是否有交集:%d", [set1 intersectsSet:set]);
            //set1是否是set集合的子集
            
            BOOL bo = [set1 containsObject:@"see"];
            NSLog(@"set1 是否包含 see %d", bo);
            
            NSLog(@"-------");
            NSMutableSet *set2 = [NSMutableSet setWithCapacity:10];
            [set2 addObject:@"chenyu"];
            [set2 addObject:@"hello"];
            [set2 addObject:@"hello"];
            [set2 addObject:@"hello"];
            [set2 addObject:@"hello1"];
            [set2 addObject:@"hello3"];
            NSLog(@"-------");
            for (id object in set2)
            {
                NSLog(@"%@", object);
            }
            NSLog(@"-------");
            [set2 removeObject:@"hello1"];
            for (id object in set2)
            {
                NSLog(@"%@", object);
            }
        }
    }


 
3、运行结果

    2018-07-18 23:26:20.748305+0800 cyTest[33554:12766983] hello
    2018-07-18 23:26:20.748415+0800 cyTest[33554:12766983] chenyu1
    2018-07-18 23:26:20.748554+0800 cyTest[33554:12766983] word
    2018-07-18 23:26:20.749114+0800 cyTest[33554:12766983] set1 和 set 是否有交集:1
    2018-07-18 23:26:20.749626+0800 cyTest[33554:12766983] set1 是否包含 see 1
    2018-07-18 23:26:20.749838+0800 cyTest[33554:12766983] -------
    2018-07-18 23:26:20.750052+0800 cyTest[33554:12766983] -------
    2018-07-18 23:26:20.773300+0800 cyTest[33554:12766983] chenyu
    2018-07-18 23:26:20.789523+0800 cyTest[33554:12766983] hello1
    2018-07-18 23:26:20.791472+0800 cyTest[33554:12766983] hello3
    2018-07-18 23:26:20.791896+0800 cyTest[33554:12766983] hello
    2018-07-18 23:26:20.797038+0800 cyTest[33554:12766983] -------
    2018-07-18 23:26:20.800879+0800 cyTest[33554:12766983] chenyu
    2018-07-18 23:26:20.804327+0800 cyTest[33554:12766983] hello3
    2018-07-18 23:26:20.804808+0800 cyTest[33554:12766983] hello





 

作者：chen.yu
深信服三年半工作经验，目前就职游戏厂商，希望能和大家交流和学习,
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