Aspect ratio constraint relative to the screen width

问题

I have set a cell image to my UITableViewCell. It is a custom cell. I have set the aspect ratio as 1:1 and the width of the image view to 50. But for iphone 5 and 5s this size is too big as I feel. So how can I change the size of the UIImageView relative to the screen width. Please help me. Thanks

This is my current view

回答1:

There are at least 2 ways you could configure image size based on the screen size:

• Size-Classes allows you to set different width constraint value based on Trait Variation: Compact or Regular. Just select the width constraint, click on the Plus button on the left of it's Constant value and add a new variation for the iPhone device screens.

• Manual approach with Aspect Ration constraint. This way you should select both ImageView and cell's ContentView, create "Equal Width" constraint and change it's multiplier value. Start with a 1:5 value - looking good.

来源：https://stackoverflow.com/questions/44941325/aspect-ratio-constraint-relative-to-the-screen-width