65 lines
2.0 KiB
Swift
65 lines
2.0 KiB
Swift
//
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// https://mczachurski.dev
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// Copyright © 2023 Marcin Czachurski and the repository contributors.
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// Licensed under the MIT License.
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//
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import SwiftUI
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struct ImagesCarousel: View {
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@State public var attachments: [AttachmentData]
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@State private var height: Double = 0.0
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@State private var selectedAttachmentId = ""
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var onAttachmentChange: (_ attachmentData: AttachmentData) -> Void?
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var body: some View {
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TabView(selection: $selectedAttachmentId) {
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ForEach(attachments, id: \.id) { attachment in
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if let image = UIImage(data: attachment.data) {
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Image(uiImage: image)
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.resizable()
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.aspectRatio(contentMode: .fit)
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.tag(attachment.id)
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}
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}
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}
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.frame(height: CGFloat(self.height))
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.tabViewStyle(PageTabViewStyle())
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.onChange(of: selectedAttachmentId, perform: { index in
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if let attachment = attachments.first(where: { item in item.id == index }) {
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onAttachmentChange(attachment)
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}
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})
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.onAppear {
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self.selectedAttachmentId = self.attachments.first?.id ?? ""
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self.calculateImageHeight()
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}
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}
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private func calculateImageHeight() {
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var imageHeight = 0.0
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var imageWidth = 0.0
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for item in attachments {
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if let image = UIImage(data: item.data) {
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if image.size.height > imageHeight {
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imageHeight = image.size.height
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imageWidth = image.size.width
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}
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}
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}
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let divider = imageWidth / UIScreen.main.bounds.size.width
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self.height = imageHeight / divider
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}
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}
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struct ImagesCarousel_Previews: PreviewProvider {
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static var previews: some View {
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ImagesCarousel(attachments: []) { attachmentData in
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}
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}
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}
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