mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-10 22:45:59 +05:45
80 lines
3.1 KiB
Swift
80 lines
3.1 KiB
Swift
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import UIKit
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/// This view is shown on the `User` screen when no one in signed in.
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final class SignedOutView: UIView {
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init() {
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super.init(frame: CGRect.zero)
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setupSubviews()
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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/// Layout exclamation symbol and label explaining there is no user signed in
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private func setupSubviews() {
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let systemImageName = "exclamationmark.circle"
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let placeHolderImage = UIImage(systemName: systemImageName)?
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.withTintColor(.secondaryLabel, renderingMode: .alwaysOriginal)
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let imageView = UIImageView(image: placeHolderImage)
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imageView.translatesAutoresizingMaskIntoConstraints = false
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addSubview(imageView)
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NSLayoutConstraint.activate([
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imageView.centerXAnchor.constraint(equalTo: centerXAnchor),
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imageView.centerYAnchor.constraint(equalTo: centerYAnchor, constant: -50),
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imageView.heightAnchor.constraint(equalToConstant: 100),
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imageView.widthAnchor.constraint(equalToConstant: 100),
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])
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let label = UILabel()
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label.numberOfLines = 3
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label.attributedText = configuredAttributedString()
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addSubview(label)
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label.translatesAutoresizingMaskIntoConstraints = false
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label.topAnchor.constraint(equalTo: imageView.bottomAnchor, constant: 20).isActive = true
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label.centerXAnchor.constraint(equalTo: centerXAnchor).isActive = true
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label.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.80).isActive = true
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}
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private func configuredAttributedString() -> NSAttributedString {
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let paragraph = NSMutableParagraphStyle()
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paragraph.lineBreakMode = .byWordWrapping
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paragraph.alignment = .center
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let attributes: [NSAttributedString.Key: Any] = [
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.paragraphStyle: paragraph,
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.foregroundColor: UIColor.secondaryLabel,
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]
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let imageAttachment = NSTextAttachment()
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let imageName = "person.crop.circle.fill.badge.plus"
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let image = UIImage(systemName: imageName)?
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.withTintColor(.systemOrange, renderingMode: .alwaysOriginal)
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imageAttachment.image = image
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let firstPartOfString = "There are no users currently signed in. Press the "
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let secondPartOfString = " button on the tab bar and select a login option."
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let fullString = NSMutableAttributedString(string: firstPartOfString)
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fullString.append(NSAttributedString(attachment: imageAttachment))
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fullString.append(NSAttributedString(string: secondPartOfString))
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fullString.addAttributes(attributes, range: NSRange(location: 0, length: fullString.length))
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return fullString
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}
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}
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