Passing a CGFloat value from viewDidLoad to viewDidAppear

Question

I am using a CGFloat value to set my scrollView's contentSize so that it adjusts dynamically to content populated in my textviews. I determine the heights of each text view and their positions in the viewDidLoad method, but have to set the scrollView height in the viewWillAppear method - otherwise the contentSize isn't correct and the scrollView won't scroll. The problem is, the CGFloat value isn't accessible in the viewWillAppear method.

How can I pass that value between the two methods?

score 0 · Accepted Answer · answered Mar 23 '14 at 01:11

0

You need to make private ivar in .m file to use it as cache between methods in you class.

@implementation YOUR_CLASS_NAME 
{ 
    CGFloat _height; 
}

answered Mar 23 '14 at 01:11

malex

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Yes! I'm a newbie, so this is really helpful. Thanks for the quick answer. – Rooncicle Mar 23 '14 at 01:38
1

But better to name it with a prefix of your own to avoid masking any unknown private ivar with such a common name as height or _height. – uchuugaka Mar 23 '14 at 01:41
Anyone have a swift 3 version of this? – andromedainiative Mar 24 '17 at 15:08

Passing a CGFloat value from viewDidLoad to viewDidAppear

1 Answers1