OC -- NSMutableDictionary

/*___________________________可變數(shù)組NSMutableDictionary__________________________________*/

//1.創(chuàng)建
NSMutableDictionary *dic = [[NSMutableDictionary alloc]init];
NSMutableDictionary *dic1 = [NSMutableDictionary dictionary];
NSMutableDictionary *dic2 = [[NSMutableDictionary alloc]initWithCapacity:5];
NSMutableDictionary *dic3 = [NSMutableDictiona dictionaryWithCapacity:5];

//2.方法
NSArray *array = @[@"arr1",@"arr2"];
//1.增&改：添加[鍵值對(duì)]

/*
  1) 判斷字典中是否有該鍵，如果沒(méi)有則添加新的鍵值對(duì)
                                        如果有則替換鍵原來(lái)所對(duì)應(yīng)的對(duì)象
*/

[dic setObject:array forKey:@"0"];
[dic setObject:array forKey:@"1"];
[dic setObject:array forKey:@"2"];
[dic setObject:array forKey:@"3"];

NSLog(@"%@",dic);


//2.刪：移除 [鍵值對(duì)]
  //移除全部
[dic removeAllObjects];

  //移除一個(gè)
[dic removeObjectsForKeys:@[@"1",@"2"]];

//移除多個(gè)
[dic removeObjectsForKeys:@[@"1",@"2"]];

NSLog(@"%@",dic)
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