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
     
    
  
 

文章来源: chenyu.blog.csdn.net，作者：chen.yu，版权归原作者所有，如需转载，请联系作者。

原文链接：chenyu.blog.csdn.net/article/details/81107211