124 lines
4.2 KiB
Swift
124 lines
4.2 KiB
Swift
//
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// OrderListView.swift
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// suixinkan
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//
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import SnapKit
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import UIKit
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/// 订单列表容器，含下拉刷新、空态与分页，对齐 Android LazyColumn。
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final class OrderListView: UIView {
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var onRefresh: (() -> Void)?
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var onLoadMore: ((Int) -> Void)?
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let tableView = UITableView(frame: .zero, style: .plain)
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private let refreshControl = UIRefreshControl()
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private let loadingIndicator = UIActivityIndicatorView(style: .medium)
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private let emptyLabel = UILabel()
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private let footerLabel = UILabel()
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private let footerSpinner = UIActivityIndicatorView(style: .medium)
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override init(frame: CGRect) {
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super.init(frame: frame)
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backgroundColor = AppColor.pageBackground
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tableView.backgroundColor = .clear
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tableView.separatorStyle = .none
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tableView.keyboardDismissMode = .onDrag
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tableView.contentInset = UIEdgeInsets(top: OrderTokens.cardGap, left: 0, bottom: OrderTokens.cardGap, right: 0)
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tableView.refreshControl = refreshControl
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refreshControl.addTarget(self, action: #selector(refreshTriggered), for: .valueChanged)
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loadingIndicator.hidesWhenStopped = true
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loadingIndicator.color = AppColor.primary
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emptyLabel.font = .app(.body)
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emptyLabel.textColor = OrderTokens.label563
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emptyLabel.text = "暂无订单"
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emptyLabel.textAlignment = .center
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footerLabel.font = .app(.body)
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footerLabel.textColor = OrderTokens.label563
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footerLabel.textAlignment = .center
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footerLabel.text = "没有更多"
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footerSpinner.hidesWhenStopped = true
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footerSpinner.color = AppColor.primary
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addSubview(tableView)
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addSubview(loadingIndicator)
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tableView.snp.makeConstraints { make in
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make.edges.equalToSuperview()
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}
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loadingIndicator.snp.makeConstraints { make in
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make.center.equalToSuperview()
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}
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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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func apply(
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isRefreshing: Bool,
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canLoadMore: Bool,
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isEmpty: Bool,
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isLoading: Bool = false,
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isLoadingMore: Bool = false
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) {
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if isRefreshing {
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if !refreshControl.isRefreshing { refreshControl.beginRefreshing() }
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} else {
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refreshControl.endRefreshing()
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}
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if isLoading, isEmpty {
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loadingIndicator.startAnimating()
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tableView.backgroundView = nil
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tableView.tableFooterView = nil
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} else {
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loadingIndicator.stopAnimating()
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if isEmpty {
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tableView.backgroundView = emptyBackgroundView()
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} else {
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tableView.backgroundView = nil
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}
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tableView.tableFooterView = footerView(canLoadMore: canLoadMore, isLoadingMore: isLoadingMore, isEmpty: isEmpty)
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}
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}
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private func emptyBackgroundView() -> UIView {
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let container = UIView(frame: tableView.bounds)
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emptyLabel.frame = container.bounds
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emptyLabel.autoresizingMask = [.flexibleWidth, .flexibleHeight]
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container.addSubview(emptyLabel)
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return container
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}
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private func footerView(canLoadMore: Bool, isLoadingMore: Bool, isEmpty: Bool) -> UIView? {
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guard !isEmpty else { return nil }
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if isLoadingMore {
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let container = UIView(frame: CGRect(x: 0, y: 0, width: bounds.width, height: 44))
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footerSpinner.center = CGPoint(x: container.bounds.midX, y: container.bounds.midY)
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footerSpinner.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin]
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container.addSubview(footerSpinner)
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footerSpinner.startAnimating()
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return container
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}
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footerSpinner.stopAnimating()
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guard !canLoadMore else { return nil }
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footerLabel.frame = CGRect(x: 0, y: 0, width: bounds.width, height: 44)
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return footerLabel
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}
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@objc private func refreshTriggered() {
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onRefresh?()
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}
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func notifyLoadMoreIfNeeded(at index: Int, shouldLoad: Bool) {
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guard shouldLoad else { return }
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onLoadMore?(index)
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}
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}
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