OC之Foundation框架NSSet

////  main.m//  NSSet////  Created by New-World on 13-11-2.//  Copyright (c) 2013年 Gary. All rights reserved.//#import <Foundation/Foundation.h>int main(int argc, const char * argv[]){    @autoreleasepool {        NSSet *set0=[[NSSet alloc] initWithObjects:@"1",@"2",@"3", nil];        NSSet *set1=[NSSet setWithObjects:@"a",@"d",@"f",nil];        NSArray *array=[NSArray arrayWithObjects:@"a",@"d", nil];        NSSet *set2=[NSSet setWithArray:array];        NSSet *set4=[NSSet setWithSet:set1];        NSLog(@"set0:%@",set0);        NSLog(@"set1:%@",set1);        NSLog(@"set2:%@",set2);        NSLog(@"set4:%@",set4);                unsigned long count=[set0 count];//集合中的对象个数        NSArray *allObjects=[set0 allObjects];//以数组的形式返回set0的对象        id object =[set0 anyObject];//获取set0中的任意对象        BOOL isContain=[set1 containsObject:@"f"];//set1中是否包含f        BOOL isInterset=[set0 intersectsSet:set1];//set0与set1是否包含相同元素对象        BOOL isEqual=[set0 isEqualToSet:set1];//set0与set1是否完全相同        BOOL isSubset=[set2 isSubsetOfSet:set1];//set2是否是set1的子集        for (NSString *s in allObjects) {            NSLog(@"s:%@",s);        }        NSLog(@"count: %ld",count);        NSLog(@"object:%@",object);        NSLog(@"set0是否包含:%d",isContain);        NSLog(@"set0，set1是否存在交集:%d",isInterset);        NSLog(@"set0，set1是否完全相同:%d",isEqual);        NSLog(@"set2是否是set1的子集:%d",isSubset);                        NSSet *set5=[NSSet setWithObjects:@"one", nil];        NSSet *appset1=[set5 setByAddingObject:@"two"];                NSLog(@"appset:%@",appset1);        NSSet *appset2=[set5 setByAddingObjectsFromSet:set0];        NSLog(@"appset2:%@",appset2);                NSArray *array2=[NSArray arrayWithObject:@"end"];        NSSet *appset3=[set5 setByAddingObjectsFromArray:array2];        NSLog(@"appset3:%@",appset3);                //-------------------NSMutableSet----------------------        NSMutableSet *mset1=[NSMutableSet setWithObjects:@"1",@"2", nil];        NSMutableSet *mset2=[NSMutableSet setWithObjects:@"1",@"3", nil];        //减去相同的内容        [mset2 minusSet:mset1];        //两个set的交集        [mset2 intersectSet:mset1];        //并集        [mset1 unionSet:mset1];                [mset2 removeObject:@"1"];        [mset1 removeAllObjects];                                }        return 0;}