nslayoutconstraint

I have gone through and removed every single user constraint yet I am still getting the following error ONLY after I rotate the device. I have absolutely no clue why though. Does anyone have any ideas? 2013-01-14 21:30:31.363 myApp[35869:c07] Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints

I have a UIView in my UIViewController in storyboard which I want to add a constraint on to space that view a distance from the top edge. Now, when I do the usual by ctrl + drag to the ViewController's main view I only get option to set it to top layout guide. This is a problem for me because at one point in the app Im going to move the main view up around 20-50px and what happens then is that view I have will not move... because its not aligned to superview. How can I manually do this in storyboard or do I have to add it programatically? Im using xcode 6. There is an arrow to the right of the

At the moment, I'm using a UITableView along with other views that are contained in a UIScrollView . I want the UITableView to have its height to be the same as its content height. To complicate things, I'm also inserting / deleting rows to provide an accordion effect so that when the user taps on a row, it will show more detail for that row. I've got the insert / deletion done, though at the moment it doesn't update the UIScrollView which is its superview so that the content size of the UIScrollView is recalculated and the UITableView along with other views in the UIScrollView are displayed

I know that the auto layout chain consists in basically 3 different process. updating constraints layout views (here is where we get calculation of frames) display What's is not totally clear to me is the inner difference between -setNeedsLayout and -setNeedsUpdateConstraints . From Apple Docs: setNeedsLayout Call this method on your application’s main thread when you want to adjust the layout of a view’s subviews. This method makes a note of the request and returns immediately. Because this method does not force an immediate update, but instead waits for the next update cycle, you can use it

I have a UIView and I set the constraints using Xcode Interface Builder. Now I need to update that UIView's height constant programmatically. There is a function that goes like myUIView.updateConstraints() , but I don't know how to use it. Select the height constraint from the Interface builder and take an outlet of it. So, when you want to change the height of the view you can use the below code. yourHeightConstraintOutlet.constant = someValue yourView.layoutIfNeeded() Method updateConstraints() is an instance method of UIView . It is helpful when you are setting the constraints