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But of course you can provide any kind of UIImage. Next we are using SF Symbol 'trash' to provide image to the action.

In place of the // delete the item here you would have the actual deletion or possibly display confirmation dialog. In a sentence, the TimelineView allow us to refresh a SwiftUI view at a given time internal, like every minute, every second or specific dates in the future.Func tableView ( _ tableView : UITableView, trailingSwipeActionsConfigurationForRowAt indexPath : IndexPath ) -> UISwipeActionsConfiguration ? If you’re not familiar with it, here is my previous article on the subject. I can add some animation too, by moving them every second via a TimelineView. This is a sample effect, I want to draw 20 images of a clock with a different opacity. Let’s end the article with another example: drawing some images on the screen inside a Canvas.

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It is even possible to use a CGContext, so you may be able to use some old code that uses CGContext inside SwiftUI without bridging to UIKit. You can also fill a shape, or draw an image or text in the context. We can use a for loop instead of ForEach, and we call the stroke method on the context to draw a shape. There isn’t a view builder here, inside the closure you don’t return a View, we just interact with the context. This is why I don’t need a GeometryReader this time, the size is provided by Canvas itself.Īs I mentioned at the beginning of the article this view is different from other SwiftUI views. We have a GraphicsContext we can use to draw on the screen and the CGSize of the view. You can then use them by referncing the icon name in UIImage (systemName: iconName). If you click the image icon in the dialog that opens, you can scroll through all system icons. This is all the code necessary to perform the same drawing.Ĭanvas provides a closure with two variables. Slightly quicker and easier variant of Sensesful's answer: When in storyboard view, click the add button at the top of the screen. This is the code of the old implementation (see here) but is it similar for Canvas except I don’t need the GeometryReader.Įnter fullscreen mode Exit fullscreen mode The image just stays as the play.fill image.

Currently when I run my code everything appears to work in the beginning but when I press the play button it does not change to the pause icon. In order to get the user’s finger position on the screen we can use a gesture recogniser. What I am trying to do is play a video once the play.fill button is tapped and then once you the video is playing the image will turn into the pause.fill image. In particular you can find the Canvas part here and the old implementation in this project. I’ll capture the user’s touches the same way, so you’ll only see a different way of drawing a set of shapes with SwiftUI.Īs usual, all the code is available on GitHub. The example is quite simple, we want our user to draw on the screen with the finger. In this article I’ll show the same example with Canvas (requires iOS 15 as you may guess) and without it, by using only SwiftUI views. That’s why I said a more “traditional” way, you’re not going to put SwiftUI views inside a Canvas, maybe you can think of it like the draw method in a UIView. The Canvas is a SwiftUI view, but it doesn’t work with a ViewBuilder like other views. In a sentence, the new Canvas view is a particular view in SwiftUI that enables you to draw in GraphicContext in a more “traditional” way. This article is about another nice introduction in SwiftUI at WWDC21, the Canvas view.Ĭanvas is also the name Apple gave to the live preview of SwiftUI views in Xcode, so you may find this post by accident while looking for that specific feature.

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