CODEWITHSUNDEEP
iosobjective-clayoutuiscrollview
manuelwaldner
manuelwaldner

Reputation: 561

UIScrollView setting contentInset in viewWillLayoutSubviews or viewDidLayoutSubviews


so this question is not about a specific problem, but a general coding question.
Until now, I often used viewDidLayoutSubviews to set a new contentInset for my UIScrollViews. The reason is simple, in viewDidLayoutSubviews self.topLayoutGuide.length is set correctly, when e.g. rotating.

But today I wondered:
Why not set the contentInset in viewWillLayoutSubviews, shouldn't it be safer to do so there?
The reason why I wondered is:
Shouldn't it be better to set the contentInset before laying out the UIScrollView than setting it afterwards? The automatic scrolling for example may behave better if doing it this way?

Maybe I'm just overthinking all this.

What do you think about this?

Upvotes: 0

Views: 498

Answers (1)

Sam Clewlow
Sam Clewlow

Reputation: 4351

Can you just set self.automaticallyAdjustsScrollViewInsets = YES inside your view controller and let the system take care of it for you, or do you need some kind of custom insets?

EDIT

I'm not sure it makes a difference, although it's difficult to know for sure without trying it. As you're just adjusting the insets, it actually should really matter if it's set before or after the layout pass is done, as it doesn't change any of your constraints or trigger another layout pass. Unless you're noticing a particular issue with scrolling on rotation, I wouldn't worry about it too much.

Upvotes: 1

Related Questions