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;
}
