I am trying to have my layout fit on multiple iPhone screen sizes, but I am having trouble resizing my UIView's to resize themselves when on screen sizes smaller than the iPhone xr.
I have constrained the views, labels, and buttons properly and everything is aligned, but when viewing the app on smaller screen size, I don't fully understand how to resize my UIView containers to resize themselves to fit smaller screens.
On smaller screens, my button does not show up because the screen size is too small. The UIView's are the issue and the stack views inside them also need to resize or shrink the text to fit everything on the screen.
Image of my storyboard, and respective screen sizes
"I don't fully understand how to resize my UIView containers to resize themselves to fit smaller screens." -UIViews won't resize according to the screen, you will have to add constraint for them so that they pick their width and height. Alternatively you have to set constraint for fixed height and width.
In my opinion, for supporting smaller screen size, you must use scrollviews as parentview. So that user can scroll in the app. Also you can give relative width and height for views inside scrollview.
Scrollviews are required because you will always want some minimum width and height for buttons, labels etc. Otherwise on larger screen like Ipad they will be very large, while on smaller screens they will be very small.
You can use TPKeyboardAvoidingScrollView: How to use TPKeyboardAvoidingScrollView, or just google for that. It handles keyboard showing and hiding task, which is a headache otherwise.
Here is how I think you can solve your issue:
Set Some minimum height and width for your topmost view(scrollview preferably).
Now add other views inside it and use relative width and height. In relative width and height you give values in ratios. Here you can get an idea how to do that: -Giving width in % values in autolayout.
Also add additional constraint on your internal views for minimum height and width so they don't fall below certain size.
I would not suggest, but you may always use UIScreen.main.bounds.size.width and UIScreen.main.bounds.size.height to get the width and height of screen. And according set values for your constraints in your view/controller class. Here is a link for setting value of constraint in swift class:
set contraint value programatically
Related
Novice that has been stuck on this problem for 2 days (please help!). I have an image that is much wider than the screen. I want the user to be able to scroll horizontally on the Image, and also want the image to be a specific height while maintaining it's aspect ratio.
Currently the UIImageView is nested within the ScrollView. The ScrollView has constraints to the Safe Area in all 4 directions, that place it in the upper half of the screen (250 from the bottom of the Safe Area). The ImageView has all 4 constraints of 0 to the "Content Layout Guide" of the Scrollview, and a 5th constraint of having an equal height to the "Frame Layout Guide" of the ScrollView.
I initially tried to set the image Content Mode to "Aspect Fit". This maintained the aspect ratio and set the image with the desired height within the ScrollView, however left a huge amount of transparency either side of the image so the user has to scroll for a while before seeing the image. For this I could not find a solution that contained the scrollview within the bounds of the non-transparent section only, so I then changed the image Content Mode to "Aspect Fill".
This removed the transparency either side but the image is now too tall and goes off the screen vertically. I have set "Clip to bounds" on the ImageView Size Inspector and also set it to true in code, but the image is still to tall and outside the height constraint specified. I also used:
gym_imageView.sizeToFit()
scrollView.contentSize = gym_imageView.frame.size
But none of this is fixing it.
My expected result was that the image with original dimensions (W: 12064px, H: 1696px)
Would resize itself to the constraint height (0 to top & bottom of Content Layout Guide of Scrollview, which in turn is constraint 0 to top of Safe Area, 250+ to bottom of Safe Area) while maintaining aspect ratio.
Any ideas?
The Content Mode changes how the image appears in the imageView, but it does nothing to resize the imageView itself.
You should set an explicit aspect ratio constraint on your imageView with a multiplier of 12064:1696. Then Auto Layout will be able to calculate the correct width of your imageView based upon the fact that it already knows the desired height.
I am working on adding constraints to my view. I have everything perfectly laid out for the iPhone X and it looks great, but I would like my view to expand/scroll to accommodate smaller screens sizes. How can I transform my current view to scroll only if the screen size is not as tall as the iPhone X? ideally with as little reconfiguring as possible.
I follow this approach.
Put all your UI components inside a UIView say it ContainerView.
Now put ContainerView inside a UIScrollView.
Now select ContainerView, add constraints to make width and height equal as of scroll view.
Add a constraint of height on ContainerView. Set its relation as "Greater Than or Equal". Set constant value equal to the height which you want.
Set priority of equal height constraint to High.
In the past i've created several buttons that changes the size for iPads or iPhones, like this and works well:
Now i want to create new buttons but the size do not change.
I set Width to 400 and Height to 100 on iPad, the aspect ratio is 200:50 but the size do not change, when i change to iPhone (its still 400x100)
iPad size:
iPhone X size:
The button is huge and do not shrink as the working buttons in pic1.
What i'm doing wrong?
You can simply remove the height, width and aspect ratio constraints. Some UI elements like UIButton and UILabel auto-size themselves based on their contents.
Also, an advice:
Never ever set width and height for buttons and labels. Once you get into changing strings from outside the storyboard, such as when localizing your app, you'll get clipped strings without noticing it.
If you want to increase the hit-area for buttons, work with content / title insets instead.
I have some issues when i launch my swift application on ipad simulator. I have a home view witch displays 5 images. In my storyboard i have set for all of those constraints for height, width and also spacing. The problem is that when my app is running from ipad , the photo on the middle is situated over the other ones and the spacing is not as i expected.
What i want is a way i can make the same space value between images for each screen size and that the images will resize themselves in order to respect the initial view. Any piece of advice is more than welcome !^.^
Remove width and height constraints for your image views and add equal width and equal height constraints to them. Check out "Auto Layout Tutorial" section "Fixing the width" to see how to set equal width between views. I recommend you to read it whole :)
Nikita is right.
I can add: often apps evolve, so you will add another image.. far better to pass to a CollectionView where every CollectionViewCell owns an image.
In this way:
1) you can decide layout very precisely (with constraints in InterfaceBuilder, or form code using NSCollectionViewFlowLayout delegate methods..)
2) You can manage rotation easily
3) You can scale for iPhone..
I'm designing the UI with IB with a lot of images, and the default design orientation is landscape. However, I need to shrink the whole view to fit in portrait mode, by shrinking to the maximum allowed width and maintaining same aspect ratio for the view with it's inner images. The best way to imagine what I want to achieve is to imagine some landscape photo. When you rotate that to portrait it shrinks to the maximum width, centers vertically, but maintains the same aspect ratio. In my case, I want to shrink a view with its all inner subviews.
First, I'm manually resizing view frame to required size in viewWillApppear, and also calling setAutoresizesSubviews to resize all it's inner views. Those inner views - images are with "Aspect Fit" and all autosizing options set (to fill the available area on resized view). However, inner views pops out of the container: some images jumps to the top, text view expands to full portrait height. Is possible to set some kind of "view-container", then say - "view resize to size X and resize all your but only inside view-container area?
When you design in IB you must check several things. First of all the "view container" properties, that is the view that contains all subview. In order to behave properly on rotation this view must be setup with right IB Autosizing properties, that is with the autosize lines (springs) and border lines (structs) correctly set. In your case you want your container to be exactly fit with the main view so enable the "structs" at the four sides and enable the "springs" inside. Play with this values and look at the "Example" displayed by IB.
Then you must instruct this container to properly behave with its subviews. So check in IB that "Autoresize subviews" and the content mode, if needed, (= "Mode") has the wished setting.
At this point you check in the device or the simulator if your view is rotating and rising properly.
Then you must take care of the content of this view, which is a UIImageView. This must be centered, so remove the structs, and autoresized, so set the springs. Then set the content mode to Aspect Fit or Aspect Fill at your wish.
These settings should work. For more complex stuff, you must programmatically set things.