Object -C NSSet -- 笔记

//

//  main.m

//  NSSET

//

//  Created by facial on 25/8/15.

//  Copyright (c) 2015 facial_huo. All rights reserved.

//

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {

@autoreleasepool {

// insert code here...

NSLog(@"Hello, World!");

NSSet *set = [[NSSet alloc] initWithObjects:@"one", @"two", @"three", @"four", nil];

//打印set 获取nsset的长度

NSLog(@"%@, %lu", set, [set count] );

bool ret = [set containsObject: @"one"];

NSLog(@"%d", ret);

//判断两个集合是否相等

NSSet *set2 = [[NSSet alloc] initWithObjects: @"one", @"two", @"three", @"four", @"five",nil];

bool isSame = [ set isEqualToSet: set2];

NSLog(@"%d", isSame);

//判断是否是子集合

bool isSub = [set isSubsetOfSet: set2];

NSLog(@"%d", isSub);

//枚举器 遍历nsset元素

NSEnumerator *enumor = [set objectEnumerator];

NSString *item;

while (item = [enumor nextObject]) {

NSLog(@"%@",item);

}

//通过数组创建集合

NSArray *array = [[NSArray alloc] initWithObjects: @"arry1", @"arry2", @"arry3",  nil];

NSSet *arraySet = [[NSSet alloc] initWithArray:array ];

NSLog(@"%@", arraySet);

//把集合变成数组

NSArray *SetToArray = [arraySet allObjects];

NSLog(@"%@", SetToArray);

// NSMutableSet; 添加元素

NSMutableSet *mSet = [NSMutableSet new];

[mSet addObject: @"a"];

[mSet addObject: @"b"];

[mSet addObject: @"c"];

NSLog(@"%@", mSet);

//删除元素

[mSet removeObject: @"a"];

NSLog(@"%@", mSet);

// 把一个集合添加到另外一个集合

NSSet *test_set = [[NSSet alloc] initWithObjects: @"d", @"e", @"f", nil];

[mSet unionSet: test_set];

NSLog(@"%@", mSet);

//取两个集合的交集

NSSet *test_set2 =  [[NSSet alloc] initWithObjects: @"a", @"b", @"f", nil];

[mSet minusSet: test_set2];

NSLog(@"%@", mSet);

//索引集合

NSIndexSet *indexSet = [[NSIndexSet alloc] initWithIndexesInRange: NSMakeRange(2, 3)];

NSArray *array2 = [[NSArray alloc] initWithObjects: @"a", @"b", @"c",@"d", @"e", nil];

NSArray *newArray2 = [array2 objectsAtIndexes: indexSet];

NSLog(@"%@", newArray2);

//

NSMutableIndexSet *muteIndex = [[NSMutableIndexSet alloc] init];

[muteIndex addIndex: 0];

[muteIndex addIndex: 1];

NSArray *newArray3 = [[NSArray alloc] initWithObjects: @"aa", @"bb", @"cc", @"dd", @"ee", nil];

NSArray *newArray4 = [newArray3 objectsAtIndexes: muteIndex];

//NSArray *a = [array2 objectAtIndex: index];

NSLog(@"%@", newArray4);

}

return 0;

}