how to renew subviews?

Question

Hello,

I want to renew a subview which is created like this:

CGRect keyLabelRect = CGRectMake(2, [heightofrow intValue]*i, [breitescroller2 intValue]-2,[heightofrow intValue]);
UILabel *keyLabel = [[UILabel alloc] initWithFrame:keyLabelRect];
[Inhalt1 addSubview: keyLabel];
[keyLabel release];

By calling a method, "breitescroller2" got a new value and this term is called a second time and a third time and so on. My problem is, that the "older UILabel" with the old position stay at the view, but i want to replace it with the new position. Is there a simple method? by deleting the whole subview (keyLabel removeFromSuperView] the newer one's are deleted too.

Thanks for help!

Answer 1

I'm pretty sure you first need to remove the old label via removeFromSuperview.

Answer 2

If you're doing it like that, would it not make more sense to simply modify the properties of the existing UILabel and not keep creating a new one each time? It seems to me that doing it the way you are now, especially since you want to replace the old one with the new one, is a bit inefficient memory-wise.

I'm only a beginner at working with Cocoa and Obj-C, though, so I might be missing something that makes my suggestion unfeasible.