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76 lines
2.8 KiB
Swift
76 lines
2.8 KiB
Swift
//
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// Copyright 2021 New Vector Ltd
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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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//
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import UIKit
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import Reusable
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/// A subclass of `UITableViewHeaderFooterView` that conforms to `Themable`
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/// to create a consistent looking custom footer inside of the app. If using gesture
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/// recognizers on the view, be aware that these will be automatically removed on reuse.
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@objcMembers
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class SectionFooterView: UITableViewHeaderFooterView, NibLoadable, Themable {
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// MARK: - Properties
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static var defaultReuseIdentifier: String {
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String(describing: Self.self)
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}
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static var nib: UINib {
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// Copy paste from NibReusable in order to expose to ObjC
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UINib(nibName: String(describing: self), bundle: Bundle(for: self))
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}
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/// The amount to inset the footer label on its leading side, relative to the safe area insets.
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var leadingInset: CGFloat {
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get { footerLabelLeadingConstraint.constant }
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set { footerLabelLeadingConstraint.constant = newValue }
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}
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/// The text label added in the xib file. Using our own label was necessary due to the behaviour
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/// on iOS 12-14 where any customisation to the existing text label is wiped out after being
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/// set in `tableView:viewForFooterInSection`. This behaviour is fixed in iOS 15.
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@IBOutlet private weak var footerLabel: UILabel!
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/// The label's leading constraint, relative to the safe area insets.
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@IBOutlet private weak var footerLabelLeadingConstraint: NSLayoutConstraint!
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// MARK: - Public
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override func prepareForReuse() {
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super.prepareForReuse()
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for recognizer in gestureRecognizers ?? [] {
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removeGestureRecognizer(recognizer)
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}
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}
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func update(theme: Theme) {
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footerLabel.textColor = theme.colors.secondaryContent
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footerLabel.font = theme.fonts.subheadline
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footerLabel.numberOfLines = 0
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}
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/// Update the footer with new text.
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func update(withText text: String) {
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footerLabel.text = text
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}
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/// Update the footer with attributed text. Be sure to call this after calling `update(theme:)`
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/// otherwise any color or font attributes will be wiped out by the theme.
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func update(withAttributedText attributedText: NSAttributedString) {
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footerLabel.attributedText = attributedText
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}
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}
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