How do I access an object by a generated instance name?

Question

I have an xib file with a number of views. Their IBOutlets are named view1, view2, view3, and so on, and I want to access them in a loop. Is it possible to do this in Objective-C?

I know in ActionScript you can generate an object's name like this: ["view"+num].

score 3 · Answer 1 · answered Oct 28 '12 at 18:48

3

Put them in an IBOutletCollection. This is an array, you can populate it in interface builder and iterate through it.

answered Oct 28 '12 at 18:48

jrturton

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score 2 · Answer 2 · answered Oct 28 '12 at 18:32

2

Rather than naming them, assign them tags (0...10) then you can pull them out of the parent view with viewWithTag:.

answered Oct 28 '12 at 18:32

Nick

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score 1 · Accepted Answer · answered Oct 28 '12 at 18:22

1

Use key value coding. If say suppose I have view1 .. view 10, then I would use it like this;

for(int i=0 i< 10; i++){
  UIView *eachView = [self valueForKey:[NSString stringWithFormat:@"view%d", i]];
}

I hope it works for you.

answered Oct 28 '12 at 18:22

Sandeep

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This works quite well. I would suggest this too. – Dylan Gattey Oct 28 '12 at 18:53

score 0 · Answer 4 · answered Dec 28 '12 at 02:11

0

Another way you can accomplish this is using NSDictionaryOfVariableBindings.

NSArray *views = [NSDictionaryOfVariableBindings(view1, view2, view3) allObjects];
for (UIView *item in views)
    do something with item;

answered Dec 28 '12 at 02:11

paulmelnikow

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How do I access an object by a generated instance name?

4 Answers4