So for my app, the tableview layout in the iOS simulator when I click run is CORRECT and as I intend. However the layout is not always 100% the same when I view the layout of the tableview in Main.storyboard. When I refresh Xcode(i.e. quit and restart app), the layout of Main.storyboard is what I intend. However, if I play around with orientations/diff iOS devices within Main.storyboard, and then return to my original device, the layout looks incorrect (even though supposedly the math/measurements are correct). Do I need to be concerned?
For reference I followed the instructions of https://www.ralfebert.de/ios-examples/uikit/uitableviewcontroller/custom-cells/ EXACTLY to make a cell (instead of an image, I used a button though). And here is an image of my iPad simulator https://drive.google.com/file/d/152scJF6h12amh-AAycDqpe6TXOzN2y-H/view?usp=sharing vs the main.storyboard simulator https://drive.google.com/file/d/1NvUfMVLk08S8qH4mFraRsQYbDzPdjaBG/view?usp=sharing
However the layout is not always 100% the same when I view the layout of the tableview in Main.storyboard.
It sounds like you might have some missing or incorrect constraints. Take a look at the little yellow arrow icon to the right of "View Controller Scene":
That icon tells you that there are some issues that you need to resolve. Click it and you'll get a list of the particular issues and your options for fixing them.
Do I need to be concerned?
The risk, of course, is that under some circumstances your view won't draw the way you want it to. Start by fixing the issues that Xcode is pointing out, and then test on lots of different devices (or simulators) as you can, in all the possible geometries you might encounter (different screen sizes, orientations, split view, etc.).
Related
Since Apple is requiring a storyboard launch screen in a few months I went ahead and tried to add one. Adding one is simple and it works just fine but it screws up the layout after loading the app. No longer does a larger screen automatically adjust the resolution, instead I'm left with an SE layout on an 8 Plus screen placed in the top-left corner with the background image repeating (like wallpaper from a 90s website). I'm not using constraints, but I'm not even sure if that's the issue. If so I have a feeling I have a lot of work ahead of me (keep in mind I've never had a need for constraints). A side thought though is, from what I understand, Apple wants all apps to look correctly on all devices... makes perfect sense. But my apps have always appeared correctly no matter the device. So it's ironic that adding the launch screen is breaking my apps' appearances. Is it the constraints? Is there an alternative solution? Or is there hopefully something simple in the launch screen that needs to be changed? Thank you!
I have an old iOS app last built on iOS 8. When the app runs on iOS 10 or higher on larger phones the view doesn't take up the entire screen, there is a black bar on the top and bottom of the screen. In the past, Apple would just expand the app so it was stretched a little.
Not sure how to fix this? I am sure there has to be an expand setting or something? I believe it has to do with setting a Launch Screen, but not sure where to set that or how to? I do have a LaunchScreen.storyboard in my files.
I have tried multiple things to fix the issue, but nothing seems to work?
Also, not sure if it is related, but the Navigation Item (deprecated?) was once sticking to the top and now just randomly floats.
I have solved this problem on my older project by adding launch screen.
Try this if you are missing launch screen:
Add a new launch screen by going to File -> New -> File... -> Launch
Screen
Make sure the newly added LaunchScreen.storyboard is selected as
the launch screen file under project settings.
to check this follow this steps:
1)Choose your project name in Xcode. 2)Select your project target. 3)Then select app icons and launch images and choose your newly added LaunchScreen.storyboard.
Given the age of the app I suspect it uses fixed sizes or size classes for its layout?
You will need to update the code that controls the layout. If the design is simple and vertical based, you may be able to a 'quick and dirty" solution by embedding everything in a stack view. However you should really update your code and/or storyboard to use Autolayout. This will fix the current problem and ensure it will work with future devices of different sizes.
I have a simple single screen app with two buttons that looks great on the story board on xcode. As soon as I run the app on my iphone 6s, it resizes the screen and the buttons at the bottom disappear. It looks like the resolution has changed and the app is not meant for an iphone 6s screen.
I have already tried the following without any success:
1) Enabled "Use Auto Layout" for my View controller in the File Inspector menu(under utilities)
2) Set the deployment target to "10.3", Devices to "iPhone" and checked "portrait, landscape left and landscape right" for Device orientation under the General Settings.
Is there any other setting that I might have missed to check that is causing this scaling? I am using xcode 8.3
Edit: I recieved some great feedback in the comments section, and learnt about adding constraints. I am here adding screenshots of what my app looks like before and after adding constraints:
Here is my xcode storyboard (what I am looking to get on my iPhone 6s)
And here is a screenshot of what I have on my phone (prior to constraining)
I have tried constraining the view like so with no luck (same output on the phone):
Is there a specific set of constraints that will do the job here?
Your screenshots show that you have not set your constraints. The last screenshot shows that you have set some constraints on the root view. Like mentioned by Martin you need to have constraints for each object.
To place the button correctly at the bottom of the view, you need to draw from your button to your view (holding the ctrl-key) and then select the bottom, leading and trailing constraints.
I suggest to make a beginner tutorial in Autolayout with InterfaceBuilder.
Thank you for your great responses. Turns out the solution was a little different than just experimenting with constraints. It took me about 3 hours to figure this out, and I wanted to share the simple solution here in case someone else goes through the same thing in the future.
The problem was in the General section of the settings. Your Launch Screen File must reflect the MainStoryboard like so:
My Launch Screen File option was previously set to nothing which caused the problem. As soon as I changed it to the MainStoryboard, things look just fine.
Hope this helps someone!
Getting through some introductory swift and playing with Xcode and I basically just have a page with some color squares, background color etc. Doesn't do anything. Problem is when I compile the code it will run in simulator just fine and show everything perfect, BUT when I rotate the device, everything disappears and it only gives me a blank white screen. Rotating right or left does it. The only view that shows it is the original upright view (for all iPhone devices that I tested on through the simulator).
Xcode 6.1.1 and iOS Simulator 8.1 are being used on my MacBook Air with OSX 10.9.5.
In the App general page, I have already checked under Deployment info that Landscape Right and Left are both checked on. Storyboard is set on Any H and Any W.
I'm not sure what I'm doing wrong and it has been pretty difficult searching since I'm still new to iOS development I'm not sure I'm using the right words or whatever because I can't find an answer.
Summary:
App displays properly in iOS Simulator, Portrait View but no other views work and will display blank white screen instead.
In order to see if your views are actually being drawn and just off screen as others have suggested capture the view hierarchy. Go to 'debug' in the menu, then in 'view debugging' click capture view hierarchy. This will pause your app and create a 3D representation of all view on your screen which you can move around by clicking and dragging.
Are your views actually being drawn? If yes are they drawing off screen? If yes then you need to fix your constraints.
It sounds like you haven't set your constraints appropriately. Try setting the top and leading constraints for each of your views to something less than 320 (should cover all device sizes). Fix your warnings, then try again. I believe the views are simply off the screen.
You don't have the correct auto-layout UIConstraints set in interface builder. Check the document outline view in interface builder and ensure that you have appropriate constraints set on each view.
Auto Layout issues occur when you create conflicting constraints, when you don’t provide enough constraints, or when the final layout contains a set of constraints that are ambiguous.
Check this Apple documentation out, it will show you step by step how to resolve your (common) issue.
I am working on an app and have come into some graphical problems when designing my app.
First off, my app is only support by iPhone. My current storyboard is using the iPhone 5 as the screen size, so everything screws up when I try to run in iPhone 4 and 4S. Is there a way to make multiple storyboards for each different screen size? Or do you all have another solution?
Thanks!
- Brad
There is a way to make different storyboards for separate screen sizes, but another way to do it is like this:
Whenever you add objects to your views, be sure to have them aligned to something (using constraints). If all items are relative to other items, then most likely the layout will be fine on all devices. Also, if you find that your controls start overlapping, then perhaps you ran out of room. In that case simply add a scroll view to your layout, and then put the controls on top of it. Then, it won't scroll on the larger screens because all controls are shown, but on smaller devices it will allow you to scroll down to see the rest of the objects.
Good luck.
There is a small button in the lower right hand corner that lets you toggle between 3.5" and 4" screen sizes so you can see how it will look on different devices. By using Auto Layout introduced in iOS 6 you can make sure to set up your constraints so that your UI looks good on both older and newer iPhones.