How do I access an object via a NSString?

Question

I have some code like this:

 for(int i = 0; i<5; i++) {

        self.objecti = someObject;

    }

I want to select an object based on i, so if i=1 then my code executes self.object1=someObject; Is it possible to create a string of the object name and then access it this way?

That is just a general example. In my app I want to modify UIButtons based on the loop. I can't use an array either. — Kex, Feb 11 '15 at 07:17
Try to tag your buttons and make changes as per condition like if(i==0){ //code } as shown in below answer. — iOSNoob, Feb 11 '15 at 07:19
Any time you find yourself with objects like `label1`, `label2`, `label3`, etc., you should just have an array of labels instead. — Aaron Brager, Feb 11 '15 at 07:21
so should I put all the labels and buttons in separate arrays? — Kex, Feb 11 '15 at 07:22
Separate arrays should work fine. If you really want to keep the combinations of button and label, you can also use an array of dictionaries for this. Each dictionary can contain a label/button combination. — Aaganrmu, Feb 11 '15 at 08:38

score 4 · Accepted Answer · edited May 23 '17 at 12:27

4

This is possible using Key Value Coding, as explained in the first answer to this question:

for(int i = 0; i<5; i++) {
    [self setValue:someObject forKeyPath:[NSString stringWithFormat:@"object%i", i];
}

edited May 23 '17 at 12:27

Community

1
1

answered Feb 11 '15 at 08:45

Aaganrmu

328
1
11

score 0 · Answer 2 · answered Feb 11 '15 at 07:17

0

You can try like this,

for(int i = 0; i<5; i++) 
{
  if(i==0)
   {
    self.yourString = [NSString stringWithFormat:@"%@",array[i]];
   }
}

answered Feb 11 '15 at 07:17

iOSNoob

1,420
2
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How do I access an object via a NSString?

2 Answers2