NSMutableDictionary

//
//  main.m
//  NSMutableDictionary
//
//  Created by dingxiaowei on 13-5-16.
//  Copyright (c) 2013年 dingxiaowei. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Student.h"    //特别注意：如果从外部导入的类文件，则需要在问价里面看有没有对它进行添加到项目中  在这儿的操作是：首先点击蓝色的项目文件-》然后点击第二个Build Phases-》接着查看compile Items 看看里面是否包含外部导入进来的那个类的.m文件

#pragma mark - 字典的创建
void dicCreat(){
    Student *stu1=[Student studentWithName:@"dingxiaowei"];
    Student *stu2=[Student studentWithName:@"hanpengyu"];
    Student *stu3=[Student studentWithName:@"jiangke"];
    NSMutableDictionary *dic=[NSMutableDictionary dictionaryWithObjectsAndKeys:stu1,@"k1",stu2,@"k2",stu3,@"k3",nil];
    //直接添加键值对
    [dic setObject:@"value" forKey:@"key"];
    //根据一个key删除一个键值对
    [dic removeObjectForKey:@"key"];
    //根据key查找value（如果找不到，则返回null）
    NSLog(@"%@",[dic objectForKey:@"key"]);
    //删除多个key对应的value
    [dic removeObjectsForKeys:[NSArray arrayWithObjects:@"k1",@"k2",nil]];
    //将另外一个dictionary添加到当前dictionary中
    NSDictionary *dicOther=[NSDictionary dictionaryWithObjectsAndKeys:@"valueOne",@"keyOne",@"valueTwo",@"keyTwo",nil];
    [dic addEntriesFromDictionary:dicOther];
    NSLog(@"%@",dic);
}

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

    @autoreleasepool {
        dicCreat();
        
    }
    return 0;
}