Popovers on iPad in SwiftUI render ugly corner aliasing when forcing a colorScheme

Development / iOS / Making of Captionista
Screenshot showing light anti-aliasing on popup corners

The app we’re working on is for adding subtitles to videos on your iPhone or iPad and because it is video oriented we’re forcing dark mode as the colour scheme using .environment(\.colorScheme, .dark).

This works great mostly, but we found that on iPad if you use popovers, the corners have a light antialiasing artefact if the system colour scheme is set to light.

Read More

Using SwiftUI .hoverEffect modifier on iPad causes doubling of visuals

Development / iOS / Making of Captionista
Screenshot of the ugly doubling effect you get when using hoverEffect

Another discovery on the trail to the Captionista release!

I thought I’d add .hoverEffect modifiers for the iPad UI to show the nice hover animations that iOS provides for pointing device users. Sadly, in SwiftUI this doubles up the visual of the buttons when focused. You move the pointer around and can see the lifted/translated version over the top of the original.

Read More

Sheets in SwiftUI on iPhone do not make the presenting view shrink behind

Development / iOS / Making of Captionista
Screenshot of modal sheet on iOS not shrinking the view behind

After solving the problem with SwiftUI adaptive popovers on iPad not dismissing properly on iPhone or in compact split view on iPad in Captionista, I noticed something…

If you show a modal sheet on iPhone, if you look closely you can see that the view behind does not shrink backwards as it would with a native UIKit modal presentation since iOS 13.

Read More

Are you seeing a weird change in text and image styles when you dismiss a SwiftUI popover?

Development / iOS / Making of Captionista

Another one from the “building Captionista” files, I noticed that on iPad any Text inside a popover that has no explicit font will change weight/size when the popover is dismissed, also affecting the layout. You only see it briefly when you tap away from the popover, but it looks bad!

Note that the same problem applies to imageScale so it looks like there is something in the environment that changes when the popover dismiss begins.

Workaround: Add .font(.body) or similar on the elements so you’re not relying on any defaults in the View hierarchy.