Question

I want to change a UIButton programmatically, is that possible?
Without any interaction.

Can I get the objects in the view somehow? If I can get them I can iterate through them and get the UIButton I want and change it to what I want to.

Answer 1

Yes, this is possible.

If you’re dealing with a dynamic number of buttons, then using tags is what you need.
When inserting your UIButton (either via Interface Builder or programatically), you can assign it a tag. As in, view.tag = 6. This means you can pull out a particular instance of your button from it’s super view.

In practise, you would typically add your button via:

UIButton* btn = [UIButton alloc] initWithFrame:...];
....
[self.view addSubview:btn];

The additional step is assigning a tag (how you keep track of your tags is up to you).

btn.tag = 44;

In order to access it again, I can extract it from my view.

UIButton* btn = (UIButton*)[self.view viewWithTag:44];

And this produces the same instance that I initially created.

If you wanted to replace it, you simply remove the old one, and create+add the new one.

[btn removeFromSuperview];
UIButton* btn2 = [UIButton alloc] initWithFrame:...];
...
[self.view addSubview:btn2];