Question

This may sound a newbie question, however I’m new to iOS dev.
Suppose with have this code.

UILabel* label = [[UILabel alloc] init];
...
[someScrollView addSubview:label];
...
label.text = @"Some Text";

is it good practice to modify the view after addSubview ?
Actually my concern is following probably, it is possible that label get released before reaching to label.text assignment, for instance in viewDidUnload, right ? and the assignment will fail.

Overall my questions are

• it is good practice to modify views after addSubview ?
• is it good practice to release view after addSubview, and later if I need to get any subview to look for it using following technique for (UIView *view in self.subviews) { if (...) ... } ?

Answer 1

Your code is fine as long as it is all in the same method and label is not reassigned during any of the … sections.

Modifying a view before or after adding it to a subview makes no difference.

If you have allocated a view, then added it to a subview, and you don’t wish to keep a separate reference to it, you should release it – this is standard memory management. The super view will retain its subviews.

To get hold of a reference to your subview again, your two options are:

• Set the tag on the subview before adding it, then use viewWithTag: to get it later
• Keep a reference to the subview as an instance variable (in this case, you wouldn’t be releasing it after creating it, you’d release it on dealloc).