I have added a 'Help' button onto my map view as shown below.
When I open it in the simulator in (iPhone 7 mode) the button appears and performs a segue properly. I changed the operating iOS to 9.3 and tested it on a real iPhone 6 running 9.3 and the button functioned properly. However, I have tested it on a real iPhone 6 running 10.0 and the button does not appear.
I thought this could be to do with auto layout but it appears fine in storyboard, simulator and the real device.
I have attached a photo of my constraints for the button below.
Any thoughts?
This may not solve your immediate problem, but you should apply as many constraints to satisfy the auto layout engine and no more. Adding more constraints may not cause conflicts on devices of the same size, but will cause conflicts on devices of different sizes causing the layout engine to have to make decisions about which to break. Often it makes choices that you wouldn't. You can check your console to see if the layout engine is breaking constraints.
If you want the button in the bottom-right corner, you only need two constraints: trailing and bottom. UIButton's have an intrinsic content size, so if you have a static title, you do not need to worry about width or height. You should remove your other constraints.
You can delete all the constraints and use only 20 to the bottom and 20 to the right (trailing) to place it nicely there.
You can play with the numbers but the main idea is that you don't need to over complicate it with too many constraints.
Related
So I'm trying to update my app for the iPhone X (a little late to the game, I know), and I enabled safe area, and fixed (supposedly) all my constraints to match. It looks perfect on the iPhone X. But for some reason, on all other iPhones, it still accounts for the iPhone X's notch, despite Safe Area correctly displaying where the UI should start and end. I'm at a loss. None of the constraints in question are hard coded, I set them all to the "standard" value (or so I believe).
storyboard (first button is actually the talk bubble, which is just a static image, second is the paw print, which is an actual button)
messed up iPhone 8 (bubble and ui elements should be at very top and bottom)
Here's my storyboard file: https://ufile.io/35zvs
UPDATE: image for ercell0
You are using standard spacing for top and bottom for your Banner View with a required priority. try setting this to superView: 0 or safeArea: 0 and see if that corrects the issue for you.
The updated view:
Can you change ViewAs from iPhoneX to iPhone8, and attach an image?
Other iphones your are testing on are running iOS11 or older?
If running older versions, safe-area won't be able to help with the alignment. For pre iOS11, use the constraints you were using previously or Layout Anchors.
So I'm porting my app to adjust for various devices (iPhone 4/4S, iPhone 5/5S, iPhone 6/6P). My app only operates in portrait mode so the constraints and such should be very easy. I have been leveraging the new Xcode 6.2 tools such as the preview tool, and inferred view controller size, so I only have one storyboard for every device. However I have set up all the necessary constraints and the app runs and looks great on all the devices, excluding the iPhone 6P. But what confuses me is that the preview for the iPhone 6P looks exactly what I want, however when I run in the simulator its not correct. Please looks at the images below to understand the problem fully.
The desired look is this: (what it looks like running on all devices except iPhone 6P)
Now what it looks like on the iPhone 6P: (as you can see the tableview is shifted (on both sides) inward.
However as seen in the storyboard, the preview shows it correctly:
This is what the constraints look like in the storyboard:
Hopefully you can understand the problem by now and hope you can offer some help, thanks in advance, feel free to ask for clarification.
As you have confirmed in the comments the issue is that you are constraining to the view margin instead of the view directly.
To stop constraining to a margin for an existing constraint, select it and in the Size inspector uncheck the Relative to marginfor the items.
When creating a new constraint by dragging with control key, holding the alt (option) key while creating constraints will toggle the margin option.
If you are creating it with the popup menu in the lower rigth just uncheck the Constrains to margin
I'm using xcode 6.1.1 version and iPhone 6 plus as testing device. I simply add a button at the right side of my xcode user interface, selecting Simulated Metrics size for iPhone 5.5-inch like this :
But when I run this on device the button goes far away from the right edge. Like this (Snap shoot from my device):
But when I select Simulated Metrics size for iPhone 4.7-inch like this :
It shows accurately in my device. Like this (Snap shoot from my device):
I tried with selecting and un selecting Auto Layout & Size Classes but do not get any clue. My device is 5.5 inch iPhone 6 plus. I even recheck it from my iPhone's packet and by IMEI Number. My question is why it is acting like iPhone 6 interface?? Is it for any reason of retina display or non retina display??
Thanks a lot in advanced.
My button's Constraints:
Select the button/ view you want. Then simply use the shortcut ⌥⇧⌘=. This will Reset to Suggested Constraints.
For this to work successfully, try moving your button to the suggested areas, i.e. move the button/ view to the top right corner like you have till the dotted blue lines appear.
Once done it should show what you expect on the interface builder but to be sure test on the simulator and/ or Device.
You need to add the proper constraints. Using simulated metrics is only for setting things up in IB, it has no effect on what the view looks like at run time. You should leave that setting at inferred.
If you don't add constraints yourself, the system adds them for you, and it adds top, left, height, and width constraints; that is not what you want. You need to add constraints to the top and right side. If you do that, the button will appear with that spacing to the right side, no matter what size screen you're using.
I think you should use constraints to solve the problem but i don't know the exact cause of this
Ctrl + drag from the item to the border in the storyboard to add constraints
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 using Xcode 4.5 and iPhone 4 and 5 simulator, and the Interface Builder would add a UIButton in the top half of the screen with a top constraint, and add a UIButton in the bottom half of the screen with a bottom constraint.
It works fine on an iPhone 5 simulator, but on the iPhone 4 simulator, the buttons can overlap, or the bottom button may even get positioned above the top button.
I think it is due to the constraint, such as the bottom button "must be 250 points away from the bottom margin". I can't delete the constraint, and if I change it to "250 points or less", it won't work, if I change it to "250 points or more", it won't work either.
Is there a way to:
1) Make it have no constraint, but just position at absolute x and y? (or what about the spring in the past, so that everything is more spaced out in iPhone 5?)
2) Make the NIB into a one for iPhone 4 and 4S only, so that the app works well on iPhone 4 and 4S and just "black barred" on the iPhone 5.
3) Make it work well on iPhone 5 and work well on iPhone 4 as well?
If you know solutions to only (1), (2), or (3), above, please give it regardless, as it is still a viable solution for the transition period.
It is actually very easy to reproduce: Create a simple Single View app using Xcode 4.5, and drag one button just above the center point of the screen, and another one just below the center point of the screen. Then run it on the Simulator. On iPhone 5, it is:
And now stop the app, and change the Device in the Simulator to iPhone 4S (3.5 inch Retina). If you don't stop the app first, the Simulator can crash. Now run the app again, and the buttons will overlap:
I had the same problem, and it was due to a wrong settings for autosizing. To change the autosizing, click on the control in the interface builder, go to the size inspector.
Notice the bold red I's in the autosizing grid, they control placement when the screen is resized (like when going from iPhone 3GS to iPhone 5.
I think it will work best for you if you make your autosizing look like this:
I'm not sure, since I haven't used constraint-based layout (and won't until we drop support for iOS 5). Traditional NIB-based autoresizing will do absolute coordinates.
You can't do that for just one screen, as far as I know — you can disable it for your whole app by removing Default-568h#2x.png.
I'd go for programmatic layout, or if you want the easy way (which will be a pain to maintain), different nibs for different screen sizes. Note that you'll want to correctly handle the in-call status bar too...
EDIT: Put the two buttons in a container view and make the constraint center the container inside its parent? It won't adjust the spacing between buttons, but should look okay on both devices.
Select your buttons and add "vertical spacing" constraint for them. And set "less than" for top/bottom margins.