HomeiOS DevelopmentHow you can Use PhotosPicker in SwiftUI

How you can Use PhotosPicker in SwiftUI

Previous to iOS 16, if it is advisable to show a photograph picker for customers to decide on images from Picture library, it’s a must to depend on PHPickerViewController or the older UIImagePickerController of UIKit. It’s not troublesome to make use of it as you’ll be able to combine UIKit elements with UIViewControllerRepresentable. That stated, it could be nice if the SwiftUI framework comes with a local view for picture picker.

In iOS 16, Apple lastly brings PhotosPicker to SwiftUI that it has the identical functionalities as its UIKit counterpart. In case your app will solely assist gadget operating iOS 16 or up, you should utilize this new view for dealing with picture picks.

Let’s see the way it works with some pattern code. Please notice that it is advisable to use Xcode 14 beta 4 to observe this tutorial.

Utilizing PhotosPicker in SwiftUI

The PhotosPicker view is bundled within the PhotosUI framework. Earlier than utilizing it, it’s a must to first import the framework:

Subsequent, we declare a state variable to carry the chosen picture:

It’s fairly simple to deliver up the images picker. Right here is the essential utilization of PhotosPicker:

You instantiate PhotosPicker by passing it a binding to the chosen merchandise and a photograph filter. Within the closure, you describe the looks of the button. With just a few strains of code, Xcode ought to present you a button within the preview.


For those who click on the button, it shows a Images picker for selecting photos from the picture library. Once you select a photograph, the picture picker mechanically dismisses and the chosen picture merchandise is saved within the selectedItem variable.


Filtering the Images

The matching parameter permits you to specify the picture filter to use to the picture library. Within the code above, we set its worth to .photos to point out photos solely. If you wish to show each photos and movies, set the worth of the parameter to the next:

The .photos filter consists of all photos within the person’s picture library. What if you wish to exclude dwell images from the picture set? You’ll be able to set the worth like this:

You employ the .not filter to exclude Dwell Images.

Dealing with the Picture Choice

As talked about earlier, the chosen picture is mechanically saved within the selectedItem variable, which has a sort of PhotoPickerItem. So, how can we load the picture and show it on display?

First, we connect the onChange modifier to take heed to the replace of the selectedItem variable. Every time there’s a change, we name the loadTransferable methodology to load the asset knowledge.

Within the WWDC22 session (What’s new within the Images picker), Apple’s engineer confirmed us to specify the kind as Picture.self. That is to instruct loadTransferable to return an occasion of Picture. Nonetheless, I couldn’t make it work on Xcode 14 beta 4. That is why I used Information.self as an alternative. Later, we are able to convert the info into an UIImage object for displaying in an Picture view.

The selectedPhotoData variable is one other state variable that’s used to carry the info object:

To show the chosen picture in a picture view, we create an occasion of UIImage utilizing the picture knowledge after which cross it to the Picture view:

That is the way you deal with the picture choice. To recap, we retrieve the picture knowledge when a person selects a picture from the built-in Images library. We save the picture knowledge to a state variable (i.e. selectedPhotoData). SwiftUI detects the worth change and triggers a UI replace to render the picture on display.


Choosing A number of Images

The PhotosPicker view also can assist a number of picture choice. Let’s construct one other fast demo to see the way it works. Once more, now we have two state variables to carry the PhotosPickerItem objects and Information object. Because the person might choose a couple of images, each variables develop into an array:

To assist a number of picture choice, the trick is to make use of one other initialization methodology of PhotosPicker:

This methodology has an extra parameter named maxSelection. We set the worth to 5, which suggests the person is allowed to assist as much as 5 images. On this case, we might seize a couple of images within the onChange closure. What we did is to load every of the picture gadgets and add it to the info array (i.e. selectedPhotosData).

For this demo view, as an alternative of making a button on the centre of the display, we put the button within the navigation bar. Right here is the total code snippet:

When there’s any adjustments of the selectedPhotosData variable, SwiftUI will refresh the UI and show the images within the scroll view.


For those who get pleasure from this text and need to dive deeper into SwiftUI, you might take a look at our Mastering SwiftUI e-book.



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