nslayoutconstraint

While there are many questions and answers about building a storyboard layout that would work both on 4" and 3.5" screen sizes, I couldn't find a suitable solution for the following scenario. I use autolayout with ios6 (and ios7), and I don't have to support landscpae or ipad. I have a UIView with several subviews, which have to look as the mockup below. It is easy to set up autolayout constraints in the storyboard to fit either of the screen sizes. My question is - how do I make autolayout choose the correct constraints depending on the screen size at runtime? Note, that I DONT want to use 2

I just finished an app on iOS 6 and bought a developer account a week ago so haven't had much time playing with the iOS 7 SDK. Just downloaded the Golden Master version and trying to upgrade my app to be compatible with iOS 7. I received a lot of warnings saying Misplaced View Frame for "Label - Label" will be different at run time. and I am unable to run the program. The project contains tableview and its is parsing and displaying XML feed from an RSS. How to fix this issue? I had the same issue and I get below response form Apple: You need to update the constraints to match the frames of

From time to time I have a subview that I would like to remove from a layout. Not only should it be hidden, but it should not be considered part of the view's 'flow', so to speak. An example: I am looking for a strategy to hide the orange view programmatically. The layout of the boxes, and their content, is via autolayout. Two things to note: the orange box is defining its vertical height based on the content, plus some top/bottom offsets for margins. So, setting the labels' text to nil will only 'shrink' the view down to it's internal margins, it won't have a height of 0. Similarly, the

I can't find a way to create a 'square' constraint, meaning 'width equals height' in Interface Builder. I guess it's possible to add such constraint programmatically. Is there something I can do in IB? Maybe I just don't see it? It seems trivial, yet I can't find it. Jano Update Xcode 5.1b5 Ctrl+click and drag from a view and release while the pointer is over the view. Select "Aspect Ratio". It will create a constraint where the first and second item is the view. Before Xcode 5.1 You can't because the width/height editor lacks the fields to relate to another property or set the ratio:

In the code below, these four methods are called for layout reasoning. I'm a little confused why all of them are needed, though, and what they do differently from one another. They're used in the process to make a cell's height be dynamic with Auto Layout. (Taken from this repository from this question .) [cell setNeedsUpdateConstraints]; [cell updateConstraintsIfNeeded]; [cell.contentView setNeedsLayout]; [cell.contentView layoutIfNeeded]; And it's from this block of code for the cell's height: - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {