Swift: How to get UIImageView image size after finishing image loading?

Question

I have a UIImageView (in UITableViewCell) which gets image from URL. Obviously, it takes some time to load image from the URL.

I want to get the image size after the image finished loading and set the cell height to the height of image. But I cant get the image height after its loaded and all constraints are applied.

Please help.

How are downloading the image? Synchronously? Asynchronously? (post the code) — tbondwilkinson, Jan 15 '16 at 09:06
I have used Alamofire library to get the image from URL. The code is somewhat messy to post here. — Narendra Ojha, Jan 15 '16 at 10:05

score 0 · Answer 1 · edited May 23 '17 at 12:15

I would suggest that you look at Alamofire (here) and the AlamofireImage (here) libraries. They are great a asynchronously loading images. There are many great tutorials available on how to use them optimally in a tableview and even an 'alamofireimage' tag on stack overflow.

In short, this is how you would download the image:

let imageView = UIImageView(frame: frame)

let URL = NSURL(string: "https://httpbin.org/image/png")!

imageView.af_setImageWithURL(URL)

In order to set the size of the cell, you would need to use auto layout constraints (see this question).

Swift: How to get UIImageView image size after finishing image loading?

1 Answers1