I want to achieve consistent views across different screens. My layout constraints works on small screens perfectly but it scrambles on large screens.
I have made a view(Red Border indicating that view)and pin it in to the main super view. Then I have made sub views and put it inside that view. I have pinned the the top bottom trailing and leading edge of the layout which contains button of the it's parent view (Red Border indicating that view). The view containing button is looking like this in small screen (iPhone 5)
while it's looking in big screens like this (iPhone 6 and above)
I want this layout to have the same relative height in all the screens like the other views. How can I achieve this?
I guess you can use UIView that contains a button inside and set bottom,lead,trailing,top constraints for the UIView. Then you can set height constraint of that UIView and set multiplier values to have relative height to its superView(=Red box). Finally, you can set constraints for your button inside the UIView whatever you want. If you know how to use StackView, I recommend you to use it because it is easy and simple solution. Here is very good tutorial about StackView.
If height is constant for subview except that button view the layout will be like what you mentioned in the first image .If you kept height as constant for that button view the problem will be solved
Related
Assume the following, simple layout:
Three views vertically stacked upon each other
Using simple vertical spacings between the views
Is it possible to hide the red view including its margins using constraints / AutoLayout only?
Settings redView.isHidden = true will hide the red view but will not change the position of the blue view. The blue view will stay at the same position as if the red view would be visible.
Using redView.removeFromSuperview() to completely remove the red view would show the desired result. Due to its optional spacing constraint to the gree view the blue view would move to where red view was. However it would be quite hard to re-show the red view because all its constraints would have to be set up from scratch.
In Android setting the visibility to View.INVISIBLE simply hides a view (as the first case described here) while View.GONE renders the remaining layout as if the view was not there at all.
Can this be done with iOS using constraints / AutoLayout only?
Of course I can achieve the same buy manually manipulating the constraints and setting up new constraints in code. But the question is, if there is a more convenient solution as in Android?
A VerticalStackView seems to fit your requirements. You can include all the views in the stack view and set the spacing directly on it.
Then, is one of the views is hidden, the stack view will automatically adjust all the constraints.
Take a look at the pictures:
If possible, wrap your views in a vertical UIStackView. You can then individual views and the other views will be rearranged as intended. You also don't need to add constraints between items, since the stackview handles the spacing between views.
The simplest way is to embed the views into a StackView and when one of them is hidden, the one below will move up into its place.
Follow these steps:
Add all the views you need in the storyboard/xib
Editor - Embed in stackView
Set the spacing in the stackView
Set the stackView constraints
Create outlets for the views you want to be hidden in a certain case
Set that views hidden property to true
Regarding the constraints, you can set them for the StackView and for the vertical one, just set the equal spacing and the space properties in the StackView.
Result:
I'm trying to have to views overlap as shown in the picture below, but I couldn't figure out how would I go about doing it with auto layout.
I tried doing the bottom view programmatically, and it worked fine except for the button which I had laid out using interface builder.
If it's possible to have views overlap what are the constraints needed, and is there a way to let the button show on top of the view in the bottom without doing programmatically?
You can do something like this.
make the second view uplift with minus value:
Here is the output. SecondView(green) has been uplifted to -50
You can do overlapping views using InterfaceBuilder. First create the top view i.e the one with image, give its constraints like top ,trailing,leading and bottom space. Then create the overlapping view.
The constraints for the overlapping view can be its trailing space, leading space,bottom space and height.
Then add those buttons inside that view.
In the interface builder, using a constraint, hook the top of the bottom view to the bottom of the top view, and then edit the constant in the Size Inspector to move it like you want.
It should look something like this:
I am learning constraints and spent whole day applying them to the following screen.It is not getting displayed properly in landscape mode.Basically i am not getting how to fix vertical space between ,say, label-Welcome to BBBB and textfield-username so that textfield always appears below the label yet the spacing between them is adjusted according to the screens of different size. If i go for Pin\Vertical space, it automatically fixes the constant value.
Remove the label (or just move it out of the way).
Fill the space that you want to resize with a view.
Constrain this view to the objects above and below and to the sides of the parent view.
Put your label into this view and constrain it to the top of this view and centred to it.
You may need to change the constraints on the objects above and below it to stop them from changing height in an unwanted manner.
This new view should now resize as the device changes orientation but the label should remain at the top of it.
Repeat on other areas of your layout (i.e put things that are not moving around as you want them into sub views and constrain these views to resize accordingly). Experiment with using variable heights, fixed heigh constraints and 'equal heights with' constraints on the views that you add to get them to resize as you need.
Edit: but you have a lot of vertically stacked items in that view - you may never get them all to fit into a horizontal orientation. You may need to remove a few, or add a scroll view or force that view only to layout in portrait mode or... Don't forget to check that it works on all devices you are targeting.
#Ali Beadle was right. Since i had a lot of vertically stacked items, lining them up in landscape mode was not possible. So, i went for scrollview.
I have taken a ScrollView first and then a UIView named ContentView on that ScrollView. I have made the width of ContentView equal to the width of parent UIView and kept its height fixed to 568. In my code i set
_contentViewHeight.constant = self.view.frame.size.height;
Now it scrolls in landscape mode while in potrait mode, it does'nt scroll.
I run into Autolayout problems all the time. But I finally figured out a way to overcome a lot of issues that arise from it.
I simply will use a container-View like ScrollView or even a plain old UIView, place all my controls in it. thats it. this makes things a lot easier for autolayout to figure out the constraints. in your case you could just use a UIView.
-start off by removing all the constraints you have I would start by selecting each control in the XIB and see if it has width/height constraint, select it then press the delete key then at the bottom of the project explorer you'll see all the constraints that auto layout has select each one then delete. that should get rid of any complaints that auto-layout might have.
-Place a UIView object inside your main View then
-move all the controls inside it. Then
-add the necessary constraints for the container view so it'll resize in different orientations and don't worry about any constraints inside the container view (auto layout will figure them out automatically).
that does the trick for me usually.
I'm setting constraints in IB like
But when i run the app on iPhone4 it shows
Why last three buttons not shown properly on iPhone4 screen?is there any mistake in my constraints ?
Edit:- This is my view hierarchy:-
UITabbarControlle -> UINavigationController -> UIViewController and tab bar controller is rootviewcontroller.
Edit:- FYI there is no effect of any constraints on the screen(basically autolayout not working for me).
You have designed the buttons on 4 inch and you don't have enough space on 3.5 for all of them.
One way to do this is to place scroll view over your view controller's view and add the buttons on the scroll view.You have to add constraint on the scroll view , to be fixed on each side (without width/height).
After that grab all the buttons and add constrains on each side and sizes , so they will be fixed
If you , on other hand, have enough space for all the buttons to fit in 3.5' without any top/bottom margins you can add the button in UIView (instead of scroll view). Place the buttons in the view and set fixed width/height on that view.Center the view and it will keep his size (with the buttons inside on both screen sizes)
There is an issue in your constraints, you have to update them.
You can do as is shown on the image bellow:
Once done, you will see, the Orange lines under your buttons turned to blue.
I wish that helps you!
Your view is probably within a UIScrollView which will extend your total contentheight. It is not related to the absolute height of your viewport.
However, what do you expect? Your 3 buttons would overlay to the next buttons, if your theoretical approach would work.
What you need to to do is to wire all buttons to each other and give the view a top and bottom constraint to the top and bottom layout. You probably need to adjust your view to be on full screen and not to extend to the bottom.
Hint: as long as something is 'yellow' you need to add further constraints.
I have constraints set in interfacebuilder that have some UIViews near the bottom of the screen. They have constraints set to have their bottom, leading and trailing edge attached to superview.
However when I view the xib within a 3.5 simulator the views are off screen(below) instead of maintaining that explicity set distance from the bottom of the 'superview'
This view is made in a xib, and then I load the xib into a view controller in code.
So my question is how do I get the bottom and top layouts to apply to these buttons inside this seperate xib I have? The buttons seem to be hard coded to layout depending on the design size of iphone 5.
Thanks
Your problem isn't the buttons, but the parent view which contains them. Make sure its constraints are set to adjust to the bottom of the screen.