将NSArray复制到一个空的NSArray中(copy NSArray inside an empty NSArray)

将NSArray复制到一个空的NSArray中(copy NSArray inside an empty NSArray)

我有第一个NSArray firstArray ，我也是

[firstArray removeAllObjects];

之后我想填充其他数组secondArray的内容

是这样写的吗？

firstArray = secondArray;

I have a first NSArray firstArray and I do

[firstArray removeAllObjects];

after I want fill it with the content of an other array secondArray

is it right write in this way?

firstArray = secondArray;

最满意答案

不， firstArray = secondArray将重新分配指针，这不是你想要的行为。 你想要[firstArray addObjectsFromArray:secondArray]

No, firstArray = secondArray will reassign the pointers, this is not the behavior you want. You want [firstArray addObjectsFromArray:secondArray]