iOS ARC NSMutableArray我是否需要在为其分配新内存之前先删除AllObjects [英] IOS ARC NSMutableArray do I need to removeAllObjects before alloc new memory for it

问题描述

NSMutableArray * arrayTest;

-(void) setContent
{
  //must I call [array removeAllObjects]; ? 
  arrayTest = [[NSMutableArray alloc] init]

  [arrayTest addObject:@"str"];
  ...//add many objects
}

我在不同的代码段中调用了此函数.我需要在之前删除arrayTest的AllObjects，然后每次为arrayTest分配内存吗?我使用ARC. 我不希望每次调用此函数时应用程序的内存都会增加.

I call this function at different code snippet. do I need to removeAllObjects of arrayTest before , then alloc memory for arrayTest every time ? I use ARC . I don't want my app memory to increase every time I call this function.

推荐答案

不，您所拥有的很好.您无需在ARC或非ARC下调用removeAllObjects.

No, what you have is fine. You don't need to call removeAllObjects under ARC or non-ARC.

旧数组被释放后，它将负责释放旧数组中的所有对象.

When the old array is deallocated, it will take care of releasing all of the objects in the old array.

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