IOS学习笔记2015-03-20OC-集合-数组

////  main.m//  OC-数组////  Created by wangtouwang on 15/3/20.//  Copyright (c) 2015年 wangtouwang. All rights reserved.//#import <Foundation/Foundation.h>#import "Person.h"int main(int argc, const char * argv[]) {    @autoreleasepool {        // 不可变数组 NSArry        NSLog(@"NSArry");        Person *person = [Person new];        person._name=@"JACK";                //初始化        NSArray *array1 = [[NSArray alloc] initWithObjects:@"jack",@"lucy",person, nil];        NSLog(@"%@",array1);                //枚举        NSLog(@"枚举器法打印数组结果:");        NSEnumerator *enums = [array1 objectEnumerator];        id obj;        while (obj=[enums nextObject]) {            NSLog(@"%@",obj);        }                //快速枚举         NSLog(@"快速枚举法打印数组结果:");        for(id obj in array1){            NSLog(@"%@",obj);        }                //下标便利        NSInteger i = 2;        id obj2 = [array1 objectAtIndex:i];        NSLog(@"%@",obj2);                //获取长度        NSInteger count=[array1 count];        NSLog(@"数组长度 %lu",count);        i=0;        for (i=0;i<count;i++) {            NSLog(@"%@",[array1 objectAtIndex:i]);        }                //可变数组 NSMutableArray                NSMutableArray *mutableArray  = [[NSMutableArray alloc] init];        //增加        [mutableArray addObject:@"JACK"];         [mutableArray addObject:@"MOBILE"];         [mutableArray addObject:@"TEL"];        [mutableArray addObject:@"BOOK"];        [mutableArray addObject:@"STUDENT"];        [mutableArray addObject:person];        NSLog(@"%@",mutableArray);                //替换对象         NSLog(@"替换对象");        [mutableArray exchangeObjectAtIndex:0 withObjectAtIndex:2];         NSLog(@"%@",mutableArray);                //移除对象 参数 id类型        NSLog(@"移除对象 参数 id类型");        [mutableArray removeObject:person];         NSLog(@"%@",mutableArray);        //移除对象 参数 NSInteger          NSLog(@"移除对象 参数 NSInteger");        [mutableArray removeObjectAtIndex:0];         NSLog(@"%@",mutableArray);                //正序枚举遍历         NSLog(@"正序枚举遍历");        NSEnumerator *_enums = [mutableArray objectEnumerator];        id obj3;        while (obj3=[_enums nextObject]) {             NSLog(@"%@",obj3);        }        //倒序枚举遍历  并且可以遍历时删除         NSLog(@"倒序枚举遍历 并且可以遍历时删除");        NSEnumerator *_reverseEnums = [mutableArray reverseObjectEnumerator];        while (obj3=[_reverseEnums nextObject]) {             NSLog(@"%@",obj3);            [mutableArray removeObject:obj3];        }        NSLog(@"倒序枚举遍历结束 查看数组长度 %lu",[mutableArray count]);                //字符串和数组的转换        NSString *str = @"hello world hao are you";        NSArray *_strArray = [str componentsSeparatedByString:@" "];        NSLog(@"lenght = %lu",[_strArray count]);                NSMutableArray *_strMutableArray = [[NSMutableArray alloc] init];        NSEnumerator *_strEnums = [_strArray reverseObjectEnumerator];        NSString *objstring ;        while (objstring=[_strEnums nextObject]) {            [_strMutableArray addObject:objstring];        }       NSLog(@"%@",_strMutableArray);                str = [_strMutableArray componentsJoinedByString:@" "];        NSLog(@"%@",str);    }    return 0;}