My table view on iPhone 7 looks like this:
I added new constraints to my table view: top, bottom, left, right 0;
and I checked horizontally in the container, too.
But on my phone (iPhone 7), like the picture shows, my table view doesn't have a vertical symmetry. Is that normal?
I also tested in a tabbed navigation controller, but the results were the same.
I didn't do anything by code. I just made a table view and added contraints...
What is the problem?
Table view separators have a 15 pixel left inset by default. If you want to change that behaviour, set Separator Insets to Custom inside the Attributes inspector and provide 0 for both values.
Moreover, your leading and trailing constraints seem to be relative to the superview's margin. Uncheck Relative to margin under the constraint's Size inspector settings.
Related
here's what I've been struggling with for the past hours.
I have a view controller that contains a few labels, a picture, and a tableview. I'm using autolayout/size classes in order to use only one storyboard for the various devices supported (meaning: all size of iphones and iPad).
Noew everything is working, except one thing : the settings in "width compact x height compact" are used for 3"5 and 4" iPhones in landscape. So either I say that the table view takes 480px and there's a whole lot of space on iPhones 5/5S, either I set it at 480px but then I cannot reliably align items vertically in my cells.
How come there is no way to say "this view should always takes the full width" ?
Any solution, even workaround, would do. Thanks a lot for your time !
There is no distinction in size classes between 3.5", 4" and 4.7" devices. They all have the same size classes deviced for horizontal and vertical, and behave the same way on rotation.
You can define a view to take all the available space. Explicitly set the bottom and top views to be attached to bottom and top edges (respectively) with constraints, and set the middle view (in your case, the table view) to take all the space in the middle by setting constraints on top with the top views, and constraints on bottom with the bottom views. Now, because top view is attached to top and bottom is attached to bottom, you will have the middle view grow and shrink as needed.
There are a couple of ways to get percentage based sizing.
Link the width of your target element to the width of another element.
Pin your element to its Superview and use the Multiplier setting instead of Constant.
Say you want to set a TitleLabel to have a relative width compared to another element.
Example for method 1:
Ctrl + drag from TitleLabel to another Target element (such as its Parent View), then choose Equal Widths, you can then change the Multiplier field in your Constraints settings to 0.5 if you want 50% width.
Example for method 2:
Pin the appropriate edges of TitleLabel to either the Center, Bottom or Trailing edges* of its Superview (Editor -> Pin -> X Space to Superview).
In the Constraints Settings, make sure you have TitleLabel in the First Item field, and the Superview as the Second Item.
*because the Top/Leading edge of the Superview will have a 0 value, a multiplier against these won't work, as 0 x 0 = 0.
I found method #1 doesn't work well in Table Views, so you may have more luck with #2.
I am simply adding a UIView into the main view of a view controller. I want the height to always be 64px, but the width to stretch to the width of the screen.
However, when I go to add constraints, the left and right padding default to -16, even though the view is stretched all the way across its parent view. Even if I set these back to 0, when I run the app the -16 padding is added back in. What is going on here?
Uncheck "Constrain to margins" checkbox in the pin menu (the first image in the question) while adding spacing to nearest neighbor for the new constraints.
I have normal UIViewController on my storyboard with a standard UIView which contains only one child - UITableView
When adding constraints between UIView and UITableView ( equal widths, equla heights, vertical space 0 top layout guide, horizontal space 0 for leading margin ) as a result my table view should fill it's parent.
Instead my table view appears to have left and top margins (16 and 64). The Size Inspector shows that the table views Alignment Rectangle is as follows x=16,y=64,width=600,height=600 although all my constraints have constants set to 0's. When I try to edit manually Alignment Rectangle I keep getting Misplaced Views warnig which try to restore previous values.
Any I idea what might be the cause of this strange behaviour?
Click the view you want to remove margins. Open Contraint Editor uncheck Prefer Margin relative:
I had a very similar problem. It was solved by deselecting Under Top Bars under Extend Edges in the properties of the topmost UIViewController in storyboard.
I have a viewController, which is configured for the iPhone5 screen size. In red rectangle is the view.
To make this view show properly in iPhone4 - I used auto layout. But when I specify constrains such as: leading edge, trailing edge, bottom space and top space (in top space I even made constraint's priority to LOW ) - the view still goes partially down the screen as if my constraints don't work.
BUT if instead of top space constraint I specify view's heigh and delete top space constraint - everything works perfectly.
Does anyone can explain it please? Thank you.
Thats because when you set up the top space constraint it will move the view by the constant you provided. iPhone 4 and iPhone 5 screen height is different but the constant remains the same so obviously it will behave differently. One way to troubleshoot your interfaces is to switching between iPhone4 and iPhone 5 on storyboard device on storyboard (first button from left to right on the bottom right corner of interface builder).
Auto-layout is all about experience in my opinion. I struggled alot with it until i learned. If you want your view to be attached to the bottom of the screen you should set the BOTTOM SPACE to 0 and specify the view's height like you did or adjust constraints for it's subviews so that the height is set dinamically according to the views inside.
I've added a uiview on a view controller(VC), trying to set it's width is equals to VC's view's width.
What I set and expected:
And what i got on iphone 6 plus:
I've tried to change the constants of leading space and trailing space and no help.
Is there any special for iphone 6+ autolayout?
The view setting here is "Any width x Regular height"
-------Added Dec 2016
To people who is confused by this case like me:
There is a layout margin property in UIView, which is an UIEdgeInsets(8,8,8,8). It is something like css padding.
When the edge of your view is close to the edge of the superview and the preservesSuperviewLayoutMargins property is true, the actual layout margins may be increased to prevent content from overlapping the superview’s margins.
The default margins are eight points on each side.
If the view is a view controller’s root view, the system sets and
manages the margins. The top and bottom margins are set to zero
points. The side margins vary depending on the current size class, but
can be either 16 or 20 points. You cannot change these margins.
Try to remove the check Constrain to margins when adding constraints. Here take a look:
Constrain to margins is checked and its result
Now, after removing the constraints and re-adding the constraints with Constrain to margins unchecked, here is the result:
Sharon's answer works wonderfully, but you don't have to delete the existing constraints to solve the problem. You may edit existing constraints removing the extraneous margin:
Editing existing constraints to remove the extraneous margin will not work. You have to delete the existing constraints and add new ones keeping constraints to margin unselected.
I faced same issue for my "Done" button. The issue was my View (Done Button) was in base View hierarchy so i bring view back in root view (view controller's view). and set constraints accordingly.
My case set constraints Pin-> Uncheck Constraints to Margin -> Bottom,Leading,Trailing (Constraints value=0)
Make sure view hierarchy should not be following way.(Subview might be but cut view must not).
I had this bug in the iPhone 6 plus simulator. But in the 6 plus device this bug didn't happen. This could be just a bug with 6 plus simulators.