I’m trying to implement a side panel that moves into place horizontally and push content over when it is shown. I set up an auto layout constraint so that an another view is a fixed number of pixels from the side view. I then want to move the origin of the side view and have the other view move with it.
If I set up an alignment constraint so trailing space from my first view to the side view is a fixed number of pixels. Let’s say 20 pixels. When I move the origin of the side view, the first view doesn’t keep the 20 pixel spacing. In fact does nothing. Looking at the Googles, I see a number of cases where people try to handle this situation by doing one of the following: • Creating another constraint from the first view to the superview margin. They then disable to first constraint to side view and and enable the alignment constraint to the superview margin. • Manually change the value of the alignment constraint to the side view. Neither seem all that satisfactory. I guess I’m wondering why the original alignment constraint doesn’t allow for dynamic changes to the view layout. Why won’t autolayout cause the views to layout again when views move? FYI, I tried calling ‘updateConstraintsIfNeeded’ on all these view after changing the side view origin and this seems to have no effect. I also checked Apple’s Autolayout programming guide and didn’t find anything that would answer this question. Thanks for any info/pointers about this. Doug _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
