Make flowlayout but fill vertically
![make flowlayout but fill vertically make flowlayout but fill vertically](https://i.stack.imgur.com/K6km9.png)
Custom layout manager: part I - Label/field pairs.Not the frame size! Not the constraint size!Īre you curious as to why all of them align to the bottom of the stack views? Let’s move on to the next section. One last thing that is important to know about these three fill* settings is that the stack view uses the intrinsic content size of the subview for the calculations. In this case, the red one gets stretched, while green and blue get to keep their size. When this happens, the stack view will choose the first one to stretch. As we never explicitly set it, all the subviews have the same default hugging priority.
![make flowlayout but fill vertically make flowlayout but fill vertically](http://what-when-how.com/Tutorial/topic-995khifo/Building-Java-Programs-A-Back-to-Basics-Approach_images/img-gen2709.png)
In this case, the stack view will pick the subview with the lowest hugging priority. With fill, the stack view will choose one subview to resize. fillProportionally on the other hand, will resize the subviews proportionally based on their size.īut, what happens with just fill? Why is our red box so much wider? fillEqually means that all the subviews will be resized so that they are all the same width (for horizontal stack view). fillEqually and fillProportionally should be pretty clear according to their names. Notice that for these three settings, the subviews are all resized in some way to fill the stack view. The lower three graphs are fillEqually (left), fillProportionally (middle), fill (right). For equalSpacing, the spacings between views are the same. Their differences are not very obvious, especially when the sizes for the subviews are similar.įor equalCentering, the subviews are placed so that center-to-center spacing between views is the same. The upper two graphs are equalCentering (left) and equalSpacing (right). We will compare various distribution and alignment settings and see how they differ from one another. How about the remaining two: distribution and alignment?Īlthough UIStackView has become so popular and so commonly used in so many applications, many people may not understand it fully and may not be using it right. (If a stack is turned sideways, it should no longer be called a stack, or should it ??) For the last one, spacing, as implied by the name, it specifies the spacing between views inside the stack view. We use axis to define the orientation of the stack view, which can either be vertical or horizontal. The first one and the last one are relatively straightforward. There are four main properties for a stack view: Not sure why it took Apple eight years to introduce this component.īut anyway, we are all very happy that it is finally available.Įven though UIStackView simplified the view layout a lot by reducing the number of constraints that we would have to implement otherwise, it can still get pretty complicated and somewhat confusing. Not really, since Android’s equivalent LinearLayout was introduced at the beginning of the universe (a.k.a. So, back to the introduction of stack view, was it that much of an innovation? Since each view on a 2D screen has four degrees of freedom, it means that, in general, we would have to create at least four constraints for each view. It is so powerful and elegant that it really speeds up a lot of us pushing to drop support for iOS 8.įor people that work with Auto Layout a lot, you will know that it is not particularly fun and easy to create NSLayoutConstraints. UIStackView is one of the most important and powerful UIKit components introduced in iOS 9.