//
// main.m
// 可变字典
//
// Created by 博博 on 16/1/8.
// Copyright (c) 2016年 com.bb. All rights reserved.
//
#define NSLog(FORMAT, ...) printf("%s\n", [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String])
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[]) {
@autoreleasepool {
NSMutableDictionary *mudic=[[NSMutableDictionary alloc]initWithObjectsAndKeys:@"jay",@"name",@"22",@"age",@"f",@"gender", nil];
//NSLog(@"%@",mudic);
NSDictionary *dic=[NSDictionary dictionaryWithObject:@"166" forKey:@"height"];//法1
[mudic addEntriesFromDictionary:dic]; //法1
[mudic setValue:@"66" forKey:@"weight"]; //法2
//NSLog(@"%@",mudic);
NSMutableDictionary *nulldic=[NSMutableDictionary dictionary];
//将字典nulldic设置与字典mudic对象相同
[nulldic setDictionary:mudic];
//NSLog(@"%@",nulldic);
//将字典中对应key的值删除
[nulldic removeObjectForKey:@"weight"];
//NSLog(@"%@",nulldic);
NSArray *keys=[NSArray arrayWithObjects:@"heighr",@"gender", nil];
[nulldic removeObjectsForKeys:keys];
//NSLog(@"%@",nulldic);
[nulldic removeAllObjects];
//NSLog(@"%@",nulldic);
//遍历
[nulldic setDictionary:mudic];
//1.先找到所有key；2.计算key的个数，用于循环遍历条件；3通过key 的数组找到对应key值
NSArray *keyss=[nulldic allKeys];
NSInteger count=[nulldic count];
for(int i=0;i<nulldic.count;i++)
{
id key=[keyss objectAtIndex:i];
//NSLog(@"%@",[nulldic objectForKey:key]);
}
//2.快速枚举
for (id key in nulldic)
{
id obj=[nulldic objectForKey:key];
NSLog(@"%@",obj);
}
//3.枚举对象（c语言中的枚举enum） 通过枚举对象进行枚举
//将字典里的key转成枚举对象，用于遍历／枚举
NSLog(@"/////////");
NSEnumerator *keyenum=[nulldic keyEnumerator];
id key=[keyenum nextObject];
while (key=[keyenum nextObject]) {
id obj=[nulldic objectForKey:key];
NSLog(@"%@",obj);
key=[keyenum nextObject];
}
}
return 0;
}
