image for nav bar button item swift

Question

I want to display an image in the left hand side of my nav bar in swift.

I have tried adding a nav bar button item and setting an image there.

The problem is

Answer 1

There is a way to use images of different sizes, depending on the device. It's called an Asset Catalog. You'll probably already have one in your project, or if not, you can add one with File > New > File > Resource > Asset Catalogue.

Within your Asset Catalog, you can have multiple 'Image Sets' (these will be shown down the left-hand side). Add a new Image Set with the '+' at the bottom. For each Image Set, you can supply different images (e.g. of different sizes) for each of @1x, @2x, and @3x.

Then, to use one of these images in code, you simply use UIImage(named: "name_of_image_set") - note no extension. The correct image will be loaded, depending on the device.

Hope this helps!