Foundation 框架之——NSDictionary、NSMutableDictionary

/**************** NSDictionary *****************/
        
        //创建一个新的字典
        NSDictionary *dictionary1=[NSDictionary dictionary];
        NSDictionary *dictionary2=[[NSDictionary alloc]init];
        NSLog(@"dictionary1:%@,dictionary2:%@",dictionary1,dictionary2);
//        NSNumber *number=[NSNumber numberWithInt:100];
        
        //创建一个包含一对键值对的字典
        NSDictionary *dictionary3=[NSDictionary dictionaryWithObject:@"value" forKey:@"key"];
        NSLog(@"dictionary3:%@",dictionary3);
        
        //创建一个包含多对键值对的字典
        NSDictionary *dictionary4=[NSDictionary dictionaryWithObjects:@[@"a",@"b",@"c"] forKeys:@[@"k1",@"k2",@"k3"]];
        NSLog(@"dictionary4:%@",dictionary4);
        
        
        NSDictionary *dictionary5=[NSDictionary dictionaryWithObjectsAndKeys:@"a",@"k1",@"b",@"k2", nil];
        NSLog(@"dictionary5:%@",dictionary5);
        
        //根据已有的字典创建字典
        NSDictionary *dictionary6=[NSDictionary dictionaryWithDictionary:dictionary5];
        NSLog(@"dictionary6:%@",dictionary6);

        //获取字典中元素的个数
        NSLog(@"dictionary6 count = %d",(int)dictionary6.count);
        
        //获取某个key值对应的value
        NSLog(@"dictionary6 key is k1 value is %@",[dictionary6 valueForKey:@"k1"]);
        
        NSArray *array=[NSArray arrayWithObjects:@"iphone",@"android",@"winphone", nil];
        NSDictionary *dictionary7=[NSDictionary dictionaryWithObject:array forKey:@"phone"];
        NSArray *newArray=[dictionary7 valueForKey:@"phone"];
        NSLog(@"newArray:%@",newArray);
        
        
        //获取字典中所有的key
        NSDictionary *dictionary8=[NSDictionary dictionaryWithObjects:@[@"a",@"b",@"c"] forKeys:@[@"k1",@"k2",@"k3"]];
        NSArray *keyArray=[dictionary8 allKeys];
        NSLog(@"keyArray:%@",keyArray);
        
        //所有的key转换成枚举
        NSEnumerator *enum1=[dictionary8 keyEnumerator];
        for (NSString *string in enum1) {
            NSLog(@"%@",string);
        }
        
        /**************** NSMutableDictionary *****************/
        NSMutableDictionary *mutableDic1=[NSMutableDictionary dictionaryWithObjects:@[@"a",@"b",@"c"] forKeys:@[@"k1",@"k2",@"k3"]];
        
        //添加
        [mutableDic1 setObject:@"value1" forKey:@"key1"];
        NSLog(@"mutableDic1 : %@",mutableDic1);

        NSMutableDictionary *mutableDic2=[NSMutableDictionary dictionaryWithObjects:@[@"1",@"2"] forKeys:@[@"k4",@"k5"]];
        
        //添加字典元素到另一个字典中
        [mutableDic1 addEntriesFromDictionary:mutableDic2];
        NSLog(@"mutableDic1%@  mutableDic2%@",mutableDic1,mutableDic2);
        
        //把当前字典所有元素替换为新的字典中的元素
        //[mutableDic1 setDictionary:mutableDic2];
        NSLog(@"mutableDic1 : %@",mutableDic1);

        //删除
        [mutableDic1 removeObjectForKey:@"key1"];
        NSLog(@"mutableDic1 : %@",mutableDic1);

        [mutableDic1 removeObjectsForKeys:@[@"k4",@"k5"]];
        NSLog(@"mutableDic1 : %@",mutableDic1);

        //根据指定key值替换value值
        [mutableDic1 setObject:@"new" forKey:@"k1"];
        NSLog(@"mutableDic1 : %@",mutableDic1);