I'm trying to get the background image in my reveal.js presentation to adjust its aspect ratio to fit the screen. Changing the size seems simple enough via
data-background-size=...
but I can't find anything that shows me how to make the image stretch to fit the screen.
You can do it manually entering two parameters: data-background-size="800px 600px" for example.
This stretches the image to fit the slide, keeping its aspect ratio:
data-background-size="contain"
The attribute is mentioned in the Backgrounds section of the documentation.
For possible values of data-background-size, see the MDN documentation.
Related
I'm having issues with constraints in XCode 12: Even if I describe accurately all measures involved, there is no way apparently to resize a 850x600 image to make it fit proportionally in the screen of an apple device. As you can see in the image, the constraints are defined to make the original image fit WITH BORDERS on the Iphone's screen, but nevertheless is turns out to be a disaster afterwards...
As you can see in the screen capture, the image overflows the screen when the model device is changed. So...we have a problem. And the answer or clue that I'm seeking night and day is...
How to make this image to become RESPONSIVE to screen size, and keep it's proportions. No way how the hell something so basic is so difficult in XCode...
must edit... look how the alignment constrainst are shown in grey...no idea why...this avoids me to try the solution provided by the good fellow above...
It seems you've defined constraints to center the imageView and having it a size of 850x600 pixels. This will keep the image of that exact same size, regardless the device it is shown on.
If you want the image to shrink, keeping the aspect ration you need to define constraint for the top, bottom, leading and trailing edge.
And you need to set the imageView's contentMode to "Aspect Fit", which is the default, afaik.
This is an image shown on an iPhone 11:
And this the same image shown on an iPhone 4s:
Edit:
One way to add those constraints is to select (highlight) the imageView and click on the button with the little square in the middle surrounded by those "T"s. :-)
I'm using slicing in the asset catalog to make my image stretch vertically, which seems to work fine if I have the view mode set to Scale to Fill
But when I change the mode to Aspect Fit, it only shows the caps of the slicing like this
I want to use Aspect Fit to keep the round shape of the circular top. How would I make this work with slicing?
For reference, this is my slicing:
One approach would be to slice the image into three pieces:
A top which has a fixed height in order to keep the proportions of the shape.
A body which stretches in height according to the content.
A bottom which also has a fixed height, again in order to keep the proportions.
By slicing like this, you have full flexibility of the height of your content. You would then align these three pieces e.g. by using auto layout.
I have an image of the UiPopOver
I want to make it bigger or smaller based on the text that i want to display in this. My plan is that i will adda text view inside the image view and scale it accordingly. I am facing difficulty in scaling the image to bigger or smaller.
For example if i know that the text that will fit in it have size of CGSize(80, 100), the how i can scale this image view to a specified size without pixelation.
Any help will be highly appreciated.
you can make the resizable image with the following insets (their positions marked by the colourful lines below), that will do the job for you:
you can find more information about how you can me a resizable image in the UIImage Class Reference, the related method's name is –resizableImageWithCapInsets:.
I'm trying to place a background image on a view, using a UIImageView or anything else that will work. I want it to fill the entire view, but maintain the aspect ratio, and allow me to control which side(s) get clipped. I'd like to use Auto Layout if possible (not code).
By setting Auto Layout constraints to keep the UIImageView the full size of the container, and setting Scale Mode to Aspect Fill, I am very close. The only problem is the image is always centered in the view, in that it is cropped on top and bottom in landscape layout and both sides in portrait. I want to be able to control that. I want to be able to "crop just the right side" (keep left edge docked to left of container), or "crop just the top". I have different images and I'll want each one to crop a different way, and possibly I'll allow users to use their own images and select from a few cropping options.
In this image, I currently get the top result, but want the option to get the bottom. The red box shows the visible area in portrait view (roughly):
My question is similar to this one: iOS Aspect Fill Image Resizing with Content Aligned to Left/Top Edge
However, I do not feel it is a duplicate because my needs are different, and I'm also including an image to help explain better. Also, I will not accept an answer of "use different images for portrait vs landscape" because that doesn't really solve the problem. If you understand my question, you would see that you would actually need a different image for every different aspect ratio, pre-cropped in each alignment I want to support. Obviously that's not really a robust solution.
I am developing a universal app for iOS-7. this particular question is specific to iPad only. I want to place an image as background of root view of a View Controller i.e. the image should fill the whole screen. The 1x image has size:768x1024. This works for Portrait orientations as non-retina resolution of iPad is also 768x1024 in portrait. In Landscape however the image does not fit. I have tried using ScaleToFit but since aspect ratio of image is not preserved I can not use ScaleToFit(their are things in image which look odd when not scaled proportionally in both axis). AspectFill resizing seems most suitable for my need, but their is a small problem. As defined in Apple Documentation "The content is resized to completely fill the bounds rectangle, while still preserving the aspect of the content. The content is centered in the axis it exceeds.". I do not want the content to be centered in axis in which it exceeds, I want it to be aligned to top/left edge.
So basically I want two things:
Aspect Fill
The content remains aligned on the Left/Top edge.
Is it possible to achieve this. Any code-snippet will be great.
Thanks
You will have to subclass the View Controller's view and manually scale and align.
Look at the code snippets in THIS answer.
Adjust imageViewXOrigin and imageViewYOrigin to align however you want.
Really the only way to get around the content fill mode is to have two different images, one for each orientation. I'd suggest changing the image in the view controllers willAnimateToOrientation: method so that you can put the image changes inside UIKit's animation block.