DisplayLink
A simplified DisplayLink abstraction for all platforms (including iOS, tvOS, watchOS, macOS, Linux).
public final class DisplayLink : Publisher {
public typealias Output = Frame
public typealias Failure = Never
}
extension DisplayLink {
public struct Frame {
public var timestamp: TimeInterval
public var duration: TimeInterval
}
}| Platform | Implementation |
|---|---|
| iOS, tvOS | CADisplayLink |
| macOS | CVDisplayLink |
| watchOS, Linux | Timer |
Includes a Combine publisher with SwiftUI integration for CADisplayLink.
SwiftUI does not currently provide any API to perform actions on a per-frame basis. This tiny
library simplifies the work of bridging between CADisplayLink and SwiftUI:
import DisplayLink
struct MyView: View {
@State var offset: CGFloat = 0.0
var body: some View {
Color
.red
.frame(width: 40, height: 40)
.offset(x: offset, y: offset)
.onFrame { frame in
self.offset += (frame.duration * 20.0)
}
}
}