What will be best or standard aspect ratio of image to fill view using UIViewContentModeScaleAspectFit, or what'll be best resolution of image to fill view???
As for as I know, you've no need to worry about the aspect ratio of image. If you set the content mode of the view to UIViewContentModeScaleAspectFit, then it
Scales the content to fit the size of the view. This option maintains the aspect ratio of the content. Any remaining area of the view’s bounds is transparent.
If the image size is 60x40, and your views size is 200x200, the image will be displayed in the size 180x120, centered on its superview. And your image may loose some details if its superview is too large to fit.
Related
I'm trying to pin an image to the top of the screen but I keep getting an extra white extra space at the top. I tried to pin the image relative to the superview instead of the save area but It didn’t work.
image's constraints relative to superview
changing the image's content mode to Scale To Fill solves the issue but it stretches the image.
After changing the image's content mode
You might want to change the contentMode of the UIImageView to either .scaleAspectFit or .scaleAspectFill, whatever fits best your needs.
Novice that has been stuck on this problem for 2 days (please help!). I have an image that is much wider than the screen. I want the user to be able to scroll horizontally on the Image, and also want the image to be a specific height while maintaining it's aspect ratio.
Currently the UIImageView is nested within the ScrollView. The ScrollView has constraints to the Safe Area in all 4 directions, that place it in the upper half of the screen (250 from the bottom of the Safe Area). The ImageView has all 4 constraints of 0 to the "Content Layout Guide" of the Scrollview, and a 5th constraint of having an equal height to the "Frame Layout Guide" of the ScrollView.
I initially tried to set the image Content Mode to "Aspect Fit". This maintained the aspect ratio and set the image with the desired height within the ScrollView, however left a huge amount of transparency either side of the image so the user has to scroll for a while before seeing the image. For this I could not find a solution that contained the scrollview within the bounds of the non-transparent section only, so I then changed the image Content Mode to "Aspect Fill".
This removed the transparency either side but the image is now too tall and goes off the screen vertically. I have set "Clip to bounds" on the ImageView Size Inspector and also set it to true in code, but the image is still to tall and outside the height constraint specified. I also used:
gym_imageView.sizeToFit()
scrollView.contentSize = gym_imageView.frame.size
But none of this is fixing it.
My expected result was that the image with original dimensions (W: 12064px, H: 1696px)
Would resize itself to the constraint height (0 to top & bottom of Content Layout Guide of Scrollview, which in turn is constraint 0 to top of Safe Area, 250+ to bottom of Safe Area) while maintaining aspect ratio.
Any ideas?
The Content Mode changes how the image appears in the imageView, but it does nothing to resize the imageView itself.
You should set an explicit aspect ratio constraint on your imageView with a multiplier of 12064:1696. Then Auto Layout will be able to calculate the correct width of your imageView based upon the fact that it already knows the desired height.
I want to make a dynamic imageView which can depend on the image ratio inside(image's ratio different).
And the imageView width follow the screen width(or the tableView width), image's height is resize by the image inside.
My storyboard looks like that:
The imageView mode set Aspect Fit.
How can the image's width be the same with tableView(or screen width)?
And to resize both the height of the image and tableView ??(don't leave yellow margin)
Don't fix the height and width of imageView.
Using constraints just set the x, y position, it automatically becomes resizable according to image size.
I suggest you add a Y constraint, e.g. use the pin board to constraint the vertical spacing to top layout guide, and then use control drag to the view controller icon, to centre the imageView horizontally, then when you set the image for the imageView, it should automatically resize to the size that the image is as you won't have set any size or aspect ratio constraints. If you wanted, you could set a constraint to say you always want it to be an equal height from the table view, however, this could cause the image to look stretched if you do not set the aspect ratio.
I am trying to make the HexaDec image fill 50% of the width of the view parent while maintaining the square aspect ratio in the storyboard.
I am using UIImage inside a ScrollView to zoom an image. But zooming reduces the quality of the image. My original image dimensions are 1200x1600 pixel and UIImage rect are 1024x768 pixel. How can I maintain the quality of the image in such cases.
Any zoom scale beyond 1.0x reduces the image quality. If you want absolutely no degrade in quality you should set the maximumZoomScale property of your scroll view to 1.0.
In your case, that means you can zoom your image from 576x768 (aspect fit of your scroll view) to 1200x1600 (its original size), approximately 2x.