metatext-app-ios-iphone-ipad/Views/AttachmentUploadView.swift

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Swift
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// Copyright © 2020 Metabolist. All rights reserved.
import Combine
import UIKit
import ViewModels
final class AttachmentUploadView: UIView {
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let label = UILabel()
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let cancelButton = UIButton(type: .system)
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let progressView = UIProgressView(progressViewStyle: .default)
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private let viewModel: CompositionViewModel
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private var progressCancellable: AnyCancellable?
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private var cancellables = Set<AnyCancellable>()
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init(viewModel: CompositionViewModel) {
self.viewModel = viewModel
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super.init(frame: .zero)
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addSubview(label)
label.translatesAutoresizingMaskIntoConstraints = false
label.adjustsFontForContentSizeCategory = true
label.font = .preferredFont(forTextStyle: .callout)
label.textAlignment = .center
label.text = NSLocalizedString("compose.attachment.uploading", comment: "")
label.textColor = .secondaryLabel
label.numberOfLines = 0
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addSubview(cancelButton)
cancelButton.translatesAutoresizingMaskIntoConstraints = false
cancelButton.titleLabel?.adjustsFontForContentSizeCategory = true
cancelButton.titleLabel?.font = .preferredFont(forTextStyle: .callout)
cancelButton.setTitle(NSLocalizedString("cancel", comment: ""), for: .normal)
cancelButton.addAction(UIAction { _ in viewModel.cancelUpload() }, for: .touchUpInside)
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addSubview(progressView)
progressView.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
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label.leadingAnchor.constraint(equalTo: layoutMarginsGuide.leadingAnchor),
label.topAnchor.constraint(equalTo: layoutMarginsGuide.topAnchor),
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label.trailingAnchor.constraint(equalTo: cancelButton.leadingAnchor, constant: .defaultSpacing),
cancelButton.topAnchor.constraint(equalTo: layoutMarginsGuide.topAnchor),
cancelButton.trailingAnchor.constraint(equalTo: layoutMarginsGuide.trailingAnchor),
cancelButton.bottomAnchor.constraint(equalTo: label.bottomAnchor),
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progressView.topAnchor.constraint(equalTo: label.bottomAnchor, constant: .defaultSpacing),
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progressView.leadingAnchor.constraint(equalTo: layoutMarginsGuide.leadingAnchor),
progressView.trailingAnchor.constraint(equalTo: layoutMarginsGuide.trailingAnchor),
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progressView.bottomAnchor.constraint(equalTo: layoutMarginsGuide.bottomAnchor)
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])
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viewModel.$attachmentUpload.sink { [weak self] in
guard let self = self else { return }
if let attachmentUpload = $0 {
self.progressCancellable = attachmentUpload.progress.publisher(for: \.fractionCompleted)
.receive(on: DispatchQueue.main)
.sink { self.progressView.progress = Float($0) }
self.isHidden = false
} else {
self.isHidden = true
}
}
.store(in: &cancellables)
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}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}