I'm trying to make buttons on view. The problem is: this view will be resized (for example, after device rotation).
So I have this:
It's OK, but when I rotate the device, it looks like this:
I want it was like at the first screen, but with wider spacing between buttons.
So I've tried to make constraints like this:
With priority 200 for --- selected constraints. But it still does not work. Any ideas?
You can solve this by adding spacer elements between them. The size of the spacers can grow, while the size of the buttons can stay the same.
See this for an example: Can AutoLayout equally space multiple buttons?
I managed to get it done to look like this:
To do this, you need to change the way you're thinking about it. I assume you were thinking "I want each button to have width of 70 and the spacing between the buttons to grow and shrink". But instead, you need to think "I want 4 buttons of equal sizes, with 50 pixels between their frame, so the frame of the button is growing/shrinking instead of the spacing".
With that, you select all 4 buttons and add an "Equal width" constraint.
Then you add 5 constraints for the spacing (Leading Space - Horizontal Spacing x3 - Trailing space) of Relation "Equal".
Related
I don't really understand constraints and have tried many different suggestions found online. All they seem to do is bunch everything up on top of one another or do nothing at all.
I have the following IPad application but I want it to work on any size device, mainly a IPod touch.
The page is simply two buttons that I want to remain the same no matter what screen they're on.
Any help on this appreciated.
It helps to think about points of reference that won't change with different screen sizes. Sometimes you want things on, say the top left corner so you just do constraints to the top and the left.
I'll give you two suggestions
Suggestion One
For your case, it seems like you might want to do constraints off centerY since you want them to be in the middle despite the screen size.
So I would make a constraint to "Center Vertically in Container" and then tap on the constraint and adjust it's value to negative or positive, so that way it's always X pixels above or below the centerY.
Now that's not going to be enough. it knows it's Y position but it doesn't know its height, width, or X position. So you need to add enough constraints to satisfy those.
A few examples:
X/Width: Two constraints to leading and trailing on each button OR Center horizontally and fixed width constraint. (again be careful with fixed width constraints since screen sizes can change, sometimes it's what you want though)
Height: Yeah just give it a height constraint in this case.
Note that this means no matter the screen size they'll always have the same gap between them (and maybe different gaps to the other edges).
Suggestion Two
Use a container view, either a stack view (fill, equal spacing, vertical alignment, a spacing value for gap between) or normal view.
You can make the view a fixed height based off the height and spacing between the buttons you want. Then simply center that container view horizontally and vertically on the super view.
Nonsuggestion
There are certainly other ways (like using buffer views with equal heights constraints. So you'd have an invisible view on top, a view in between and a view on bottom. and you'd give those equal heights constraints and align the buttons to the edges of the invisible views surrounding them. As long as you gave the buttons a fixed height this would work for vertical constraints) but I think these two would probably be the best.
I'm working on a calculator app that looks like this so far:
The clear button is constrained to 8 pixels below the text field that's above it (which also has constraints that keep it 8 pixels from the edges in the top left corner), the 7 button is constrained to 8 pixels below the clear button, etc. and all of these buttons have a constraint that says they are all equal heights.
My goal is to add a constraint that says the 0 button is 8 pixels above the bottom of the parent view, and then have all the buttons automatically resize to maintain the size and spacing constraints between them. However, adding this constraint just generates some conflicts rather than resizing the buttons. Is there a simple way to tell my app to resize the buttons to satisfy constraints? This is a picture of what I'm hoping these buttons would look like if all goes as planned:
Thanks so much!
Your problem is as a reason for varying in screen height satisfying your constraints can only be done by letting one part (Above 4 blocks / 0 button) to resize itself according to the constraints set for the other part , So Insert the first 4 blocks (4*4) in a UIStackView (inside it 4 horizontal stackViews ) and make it Fill Equally
then when you give any height to 0 Button the above stackView will resize accordingly
Note : I know there is a button on the bottom - right that spans 2 rows , no problem add it above the design i mentioned
I'm currently setting up a login screen that should ultimately look something like this:
I've successfully accomplished all the constraints needed to create the desired look on all screen sizes, however, I can not seem to figure out the constraint needed to correctly align the "Don't have an account? Signup". I've designed it so the "Don't have an account?" is a UILabel, and "Signup" is a UIButton. I've just aligned these side by side.
The UILabel, "Don't have an account?", has the following constraints:
The UIButton, "Signup, has the following constraints:
These constraints seem to accomplish what they need to on screen sizes 4" and below. however the 4.7 inch, and 5.5 inch (iPads excluded), have wide spacing between the UILabel and UIButton. I've read Ray Wenderlich's tutorial on auto layout, and still can not figure out the problem (I'm new to auto layout, but I have an idea what I'm doing. I'm not just adding random constraints hoping it works).
This is what it looks like on all my targeted devices:
Notice as screen size increases, so does the gap in between the label and button. Any help is appreciated.
You are setting the leading space of the label to its superview, and you are setting the trailing space of the button to its superview. So obviously if the superview gets wider, they are going to get further apart.
So if that's not what you want, don't do that.
The actual solution to what you want to do is quite tricky. You want these two objects to behave as a group, and you want that group to be centered. There's no simple way to express that. You will need to make a group. In other words, you will need a container view, give that view an absolute width and center it, and put these two objects inside the container.
New in iOS 9, a UIStackView can help you with this.
Another approach that works is to use a couple UIViews as spacers. I sometimes prefer this to containment, but it is probably a matter of taste.
Remove the leading constraint from your UILabel.
Remove the trailing constraint from your UIButton.
Add a UIView with clear background in front of your UILabel. Set a leading constraint from this UIView to the container leading edge with constant 0. Set a trailing constraint to the UILabel with constant 0.
Similarly, add another UIView after your UIButton. Set a leading constraint from this UIView to the UIButton with constant 0. Set a trailing constraint from this UIView to the container trailing edge with constant 0.
Both UIViews will need a Y position and height. These are somewhat arbitrary so I would set Align Center-Y constraints with your UILabel, and height constraints of say 5.
Here's where the magic happens: select both UIViews and set an Equal Widths constraint. This forces the UIViews to occupy equal space on both sides.
UIStackView is overkill for this situation. Just
Put the label and button in a single UIView.
Constrain the label's left and center Y to the container view.
Constrain the button's right and center Y to the container view.
Constrain the label's right edge to the button's left edge.
Set the horizontal content hugging priority of the containing view to 1000.
Constrain the containing view's center X to its superview.
You can do it to your existing code only by setting few constraints. And this would work on all resolutions even on the iPad. You don't need to group them , i have attached the images to show the constraints that i have applied.
And for the button set this constraints
It would be shown properly on all the devices kindly have look as to how it looks on all the resolutions and also in the landscape mode of each resolution
Thanks
Omkar
I am creating a view within IB and and attempting to have 3 UILabels evenly space horizontally across the view. I came across this on SO, https://stackoverflow.com/a/30249550/4597666. I have three UILabels, each have the height and width constrained. Here is what the IB looks like:
I constrained each centered horizontally, and the first UILabel I have the multiplier 3:1, second, 3:3, third 3:5 like the post states.
When I run on my emulator, I don't get the result that I was expecting. It appears all three UILabels are centered horizontally, and the first and third are not offset.
Is there another setting that I'm missing, or another way to properly space the views evenly?
you need to make only one change.
Constraint you set is 3.CenterX to Superview.CenterX all you need to do is interchange the value so that you constraint should look like in below image.
Alternative solution. If you want to set constraints currently you have set then change the ratio from "3:5" to "5:3" and similar for all the labels.
Result:
Hope it helps you solving your problem.
I need to create a simple layout with a few labels and buttons. Here's how I have positioned the UI elements in the IB.
This is how I want them to look like in the app as well. The label set on the left side with the same width so the elements on the right side will adjust their widths accordingly.
I have set the leading space to superview constraints on the labels on the left side and set vertical spacing between each of them. Similarly I've added trailing space to superview constraint to the labels and buttons on the right side with vertical spacing between each other. I've also added horizontal spacing between each couple of elements (ex: Name <-> John Doe, Telephone <-> button).
When I run it, it looks like this.
The elements only take up widths as their content needs. I assume this problem occurs because there is no way to auto layout to decide on a width. If I set the labels on the left to same width constraint, it doesn't work at runtime because the constants for them are fixed so they looks like this.
How can I make them appear properly like I have them in the interface builder?
Thank you.
I uploaded a test Xcode project with this issue here.
In your final example, it looks like you almost achieved what you wanted. You made all the labels on the left have the same width. You can now set a width constraint on the first label to a width that works for you, and the other labels should automatically match. The only issue you might still have is getting it to look good on wider screens.