I'm trying to constraint one dog image so that it is centered vertically in the container, which I can do. What I can't seem to get it is having it just above the halfway horizontal point. So I want it to be a certain fraction down the screen (say a third) on any device. I also want the size of the image to be relative to the screen size.
I want the image to be about what it is in the image but maintain its proportions relative to the device of the user.
I've tried tons of things and none of them work. Any help is appreciated.
Here's the Image
Create an UIView and set the image to fill the UIView. After that make the UIView top constrain equal to the centerY anchor which makes the UIView below center horizantal. By using layout anchors for width and height ( not fixed hard coded numbers) you will make it's size relative to device size so doesn't matter using any device type. Post a graphical design if you need more specific answer.
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First of all, sry for my English mistakes, I'm not a native English speaker.
I'm trying to make an UI which is composed of a canvas within different gameObject, and I would like that my canvas scales to the dimension of the screen but keeps its original resolution (16x9 portrait). If it is displayed on a tablet resolution (4x3) then an image is displayed in the space that is not covered by the canvas.
But actually all I've got is a canvas which scales to every resolution, and it changes the aspect of its child (for example a square becomes a rectangle).
Thank you for showing interest in my query!
UI's are heavy beasts. Canvas in Unity have a component attached to themm called Canvas Scaler which is set by default on Constant Pixel Size. You may try to set this property on Scale With Screen Size and then specify the base resolution you want to work with (usually 1920x1080 is a console standart). This is your first step
Then, to avoid strange Image scaling, you may check the property Preserve Aspect, this way the ration of the Sprite into your Image will remain the same indepently of the ratio of the Image
Last, you may play a bit with anchors but this is another story, you should let those at plain center at the beginning and come back to it when you will feel ready
Hope that helped ;)
Your canvas should have a component called Canvas Scaler. Here it should say Constant Pixel Size, change this to Scale With Screen Size and it should lock the Canvas to be the same width / height as the screen. If you want to lock an image to a specific width/height ratio, go to the Image component on the image and check the Preserve Aspect checkbox. This way if you have a 100x100 image, the images width will always be the same as the height. If you have a 200x100 image, the images width will always be twice the height, etc etc etc.
I'm new to iOS development. I'm trying to add logo on launchscreen in centre. I've a background with gradient colour so I've used a png file and stuck it in the background.
Next is logo which I want to centre for all devices.
I've two part questions
1) Is there anyway I can specify the constraints so that it is applicable to all devices? Example specifying top and bottom constraints in % ?
2) If above is not possible then how do I align logo in centre so that it works on all devices? Do I need to apply constraints separately on all devices?
I tried to set the width and height separately for all devices but it modifies dimensions on other devices. Not sure if this approach will work or I'm doping something wrong?
I'm aware that in worst case that I can just create launchscreens with logo in it as png and stick them for each devices separately which will work. I just wanted to know if it can be done with constraints.
Tx
As you suggested I added constraints to align it in centre horizontally and vertically. It seems to be good on one device but on other it's not. Please see images below.
And then how do I change image size?
One device
2nd device
You do have centerY and centerX constraints.
In storyboard, select the imageView that you have already added to your view. Right-clic drag to the main view (full screen view) in the left panel and choose center horizontally, repeat with center vertically.
You will need to also set the width and height constraints of your logo.
ALTERNATIVELY:
You don't need to clic drag, you can add the center constraints in the "add new alignment constraints" tab.
Finally I manage to solve what I Was looking for thanks to all those who helped. It was good learning period, 2 days in total ;)
Step 1: Align image to centre vertically and horizontally.
Step 2: Scale logo to fill the space. Please follow this video which is bang on point what I was looking for.
http://roadfiresoftware.com/2015/04/how-to-scale-an-image-view-based-on-device-size-with-auto-layout-in-interface-builder/
A designer I'm working with wants to have a UIImageView be at a specific y position, with a specific width/height depending on the iphone size. I've done research and I haven't been able to find anything online that allows me to do so with constraints on the story board. I want to avoid having to use code because throughout the rest of the app there are a lot of similar situations. In the past I've made different storyboards for each phone size to accommodate for the specificity our clients request, but I want to avoid doing this because it feels like bad practice. Is this even possible?
This can be completely handled in the Interface Builder. Follow the steps below.
1) Add your UIImageView to the ViewController
2) Set constraints for Width, Height, Vertically Align and Horizontally Align
3) You can adjust the Y position in the Size Inspector of the view.
4) Now switch to Assistant Editor and choose 'Preview' and add different screen sizes to see the auto layout in action.
All of this will set a static image size of 250x200, horizontally centered, and vertically at 1/4 of the screen height.
Little-known capability of constraints are that you can set view positions, or in your case sizes, by way of ratios against other views.
With just your image view selected, the tie-fighter :) constraints button lets you specify absolute positions & sizes: do that to set your desired y-position. But then select both your image view and its enclosing parent view, then the pop up for that same button now enables the equal height/width buttons. Add those constraints and then edit the constraint to change the 1:1 ratio to whatever ratio you need.
Excuse my lack of screenshots, posting from my phone.
I have this UIImageView which may contain images with different ratios.
I have studied the properties of UIImageView and it seems that the Aspect Fill property set for the Mode of the View should be what I need.
It works as intended when the image is wider than taller: cuts the left and right parts of the image out of the UIImageView.
However if the image is taller than wider it does not cut the above and below part of the image, it allows the image to come out of its view and overlap below views.
These are the constraints I have for the UIImageView:
I have seen several tutorials proceeding like I do, but the result is different for me.
If the image is fitting correctly, but is extending outside the bounds of the image view, try turning on "clip subviews"
For such condition , Two possible solution may help :
Calculate aspect ratio based on your required dimension so that picture quality remains intact . ( ** use Aspect Fit calculator to find required ratio)
CENTER OR ASPECT FIT attributs of Imageview
Thanks
I have read this post and I have tried with many examples but i could not put two images one beside the other, each one with a width 50% and at the same time that this images maintain their aspect ratio. I do not understand what restrictions need to.
I have this:
In the image you can see the viewcontroller structure, 2 imageview and the constraints.
Please I need help, at least one similar example. Thanks.
I can see you have missing constraints on your scene, so that could be an issue.
I would put the UIImageViews in a container view pinned to your main view, making sure there are no missing constraints. The benefit of this is in debugging - you can give it a different BG colour and make sure it's resizing itself properly on the simulator/device. I found that putting the image views inside this helps enormously.
Then you need to specify Aspect Ratio constraints on your image views, and also make them equal widths and heights. Add some small constant horizontal spacing between your image views and top/leading/trailing to the container view, and let auto-layout decide the optimal image sizes.
I've included a screenshot of my storyboard:-
This renders like so:-