ios - How do I make my UIImageView automatically scale while having a fixed width?--

I have a lot of different sized images that I want to display inside of a UIScrollView. I always want the images to be displayed at 300px wide with a variable height (to keep the aspect ratio).

I tried a bunch of things, but nothing works. I either get the images cut off on the sides or squished.

Any ideas?

Any code or examples greatly appreciated!

ios - How do I make my UIImageView automatically scale while having a fixed width?--
ios, uiimageview,

There are some built-in functions in iOS that allow you to look at image data (take a look at . For this instance, if you have a

UIImage *imageObj = [UIImage imageNamed:@"whatever.png"];

You can find the height and/or width CGGetImageWidth/CGGetImageHeight:

size_t pixelsWide = CGImageGetWidth(imageObj.CGImage);
size_t pixelsHigh = CGImageGetHeight(imageObj.CGImage);

UIImage* image = [UIImage imageNamed: @"img.jpg"];

... where image is, let's say 1280 * 720px

300/1280 = 0.234375

This is our scale factor that we'll use and multiply the height by, to match your target width of 300px.

0.234375 * 720 = 168.75px height

Thus, our 1280 * 720px image goes to 300 * 169px. (rounded)

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