NSMutableData or NSMUtableArray?

Question

my problem is, i have a NSMutableArray of 3 objects :

[myMutableArray insertObject :Obj1 atIndex:0];
[myMutableArray insertObject :Obj2 atIndex:1];
[myMutableArray insertObject :Obj3 atIndex:3];

And then, insert atIndex0 the Obj3. After that, i want to "push" my mutable array as index1 become my first index. I saw that NSMutableData could be interesting but i don't know how to use it. Is it possible ?
I already try to use NSMUtableData but, don't know how to handle it. Thanks a lot...

Answer 1

您可以使用这些方法将对象推送到NSMutableArray：

1. 到头开始

   [myMutableArray insertObject:obj1 atIndex:0];
   [myMutableArray insertObject:obj2 atIndex:0];
   

  

如果索引已被占用，则索引处及以后的对象为   通过在他们的指数上加1来腾出空间。 （苹果）

1. 到最后

   [myMutableArray addObject:obj1];
   [myMutableArray addObject:obj2];
   

  

要添加到数组内容末尾的对象。该值不得为零。 （苹果）