SDWebImageSwiftUI/Example/SDWebImageSwiftUIDemo/DetailView.swift

133 lines
4.3 KiB
Swift

/*
* This file is part of the SDWebImage package.
* (c) DreamPiggy <lizhuoli1126@126.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
import SwiftUI
import SDWebImageSwiftUI
// Placeholder when image load failed (with `.delayPlaceholder`)
#if !os(watchOS)
extension PlatformImage {
static var wifiExclamationmark: PlatformImage {
#if os(macOS)
return PlatformImage(named: "wifi.exclamationmark")!
#else
return PlatformImage(systemName: "wifi.exclamationmark")!.withTintColor(.label, renderingMode: .alwaysOriginal)
#endif
}
}
#endif
extension Image {
static var wifiExclamationmark: Image {
#if os(macOS)
return Image("wifi.exclamationmark")
.resizable()
#else
return Image(systemName: "wifi.exclamationmark")
.resizable()
#endif
}
}
struct DetailView: View {
let url: String
@State var animated: Bool = true // You can change between WebImage/AnimatedImage
@State var isAnimating: Bool = true
@State var lastScale: CGFloat = 1.0
@State var scale: CGFloat = 1.0
@EnvironmentObject var settings: UserSettings
var body: some View {
VStack {
#if os(iOS) || os(tvOS) || os(visionOS)
zoomView()
.navigationBarItems(trailing: Button(isAnimating ? "Stop" : "Start") {
self.isAnimating.toggle()
})
#endif
#if os(macOS) || os(watchOS)
zoomView()
.onTapGesture {
self.isAnimating.toggle()
}
#endif
}
}
func zoomView() -> some View {
#if os(macOS) || os(iOS) || os(visionOS)
return contentView()
.scaleEffect(self.scale)
.gesture(MagnificationGesture(minimumScaleDelta: 0.1).onChanged { value in
let delta = value / self.lastScale
self.lastScale = value
let newScale = self.scale * delta
self.scale = min(max(newScale, 0.5), 2)
}.onEnded { value in
self.lastScale = 1.0
})
#endif
#if os(tvOS)
return contentView()
.scaleEffect(self.scale)
.onReceive(self.settings.$zoomed) { zoomed in
withAnimation {
self.scale = zoomed ? 2 : 1
}
}
#endif
#if os(watchOS)
return contentView()
.scaleEffect(self.scale)
.focusable(true)
.digitalCrownRotation($scale, from: 0.5, through: 2, by: 0.1, sensitivity: .low, isHapticFeedbackEnabled: false)
#endif
}
func contentView() -> some View {
HStack {
if animated {
#if os(macOS) || os(iOS) || os(tvOS) || os(visionOS)
AnimatedImage(url: URL(string:url), options: [.progressiveLoad, .delayPlaceholder], isAnimating: $isAnimating, placeholderImage: .wifiExclamationmark)
.indicator(.progress)
.resizable()
.scaledToFit()
#else
WebImage(url: URL(string:url), options: [.progressiveLoad, .delayPlaceholder], isAnimating: $isAnimating) { image in
image.resizable()
.scaledToFit()
} placeholder: {
Image.wifiExclamationmark
.resizable()
.scaledToFit()
}
.indicator(.progress)
#endif
} else {
WebImage(url: URL(string:url), options: [.progressiveLoad, .delayPlaceholder], isAnimating: $isAnimating) { image in
image.resizable()
.scaledToFit()
} placeholder: {
Image.wifiExclamationmark
.resizable()
.scaledToFit()
}
.indicator(.progress(style: .circular))
}
}
}
}
#if DEBUG
struct DetailView_Previews: PreviewProvider {
static var previews: some View {
DetailView(url: "https://nokiatech.github.io/heif/content/images/ski_jump_1440x960.heic", animated: false)
}
}
#endif