209 lines
8.4 KiB
Swift
209 lines
8.4 KiB
Swift
//
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// MPPositive_SearchHistoryView.swift
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// relax.offline.mp3.music
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//
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// Created by Mr.Zhou on 2024/8/7.
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//
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import UIKit
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///搜索历史
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class MPPositive_SearchHistoryView: UIView {
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//历史标签
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private lazy var historyLabel:UILabel = createLabel("History", font: .systemFont(ofSize: 14*width, weight: .regular), textColor: .init(hex: "#666666"), textAlignment: .left)
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//删除按钮
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private lazy var deleteBtn:UIButton = {
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let btn:UIButton = .init()
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btn.setBackgroundImage(UIImage(named: "Tag_Delete'logo"), for: .normal)
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btn.addTarget(self, action: #selector(deleteClick(_ :)), for: .touchUpInside)
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return btn
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}()
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//搜索历史展示
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private lazy var collectionView:UICollectionView = {
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let layout = MPPositive_TagFlowLayout()
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layout.delegate = self
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let collectionView:UICollectionView = .init(frame: .init(x: 0, y: 0, width: screen_Width, height: screen_Height), collectionViewLayout: layout)
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collectionView.showsVerticalScrollIndicator = false
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collectionView.showsHorizontalScrollIndicator = false
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collectionView.backgroundColor = .clear
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collectionView.dataSource = self
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collectionView.delegate = self
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collectionView.register(MPPositive_SearchTagCollectionViewCell.self, forCellWithReuseIdentifier: MPPositive_SearchTagCollectionViewCellID)
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return collectionView
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}()
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private let MPPositive_SearchTagCollectionViewCellID = "MPPositive_SearchTagCollectionViewCell"
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//历史数据
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private var historys:[MPPositive_SearchTagModel] = []
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var selectedTagBlock:((String) -> Void)?
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override init(frame: CGRect) {
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super.init(frame: frame)
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confirgue()
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}
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private func confirgue() {
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backgroundColor = .clear
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//添加控件
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addSubview(deleteBtn)
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deleteBtn.snp.makeConstraints { make in
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make.width.height.equalTo(24*width)
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make.right.equalToSuperview().offset(-18*width)
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make.top.equalToSuperview().offset(24*width)
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}
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addSubview(historyLabel)
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historyLabel.snp.makeConstraints { make in
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make.centerY.equalTo(deleteBtn)
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make.left.equalToSuperview().offset(18*width)
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}
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addSubview(collectionView)
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collectionView.snp.makeConstraints { make in
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make.top.equalTo(deleteBtn.snp.bottom).offset(6*width)
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make.left.bottom.right.equalToSuperview()
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}
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}
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//更新搜索历史数据
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func reloadHistory() {
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MPPositive_LoadCoreModel.shared.reloadSearchTags {
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[weak self] in
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guard let self = self else {return}
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historys = MPPositive_LoadCoreModel.shared.searchTags
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collectionView.reloadData()
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}
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}
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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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//删除按钮
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@objc private func deleteClick(_ sender:UIButton) {
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//移除所有
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historys.forEach { item in
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MPPositive_SearchTagModel.delete(item)
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}
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guard let layout = collectionView.collectionViewLayout as? MPPositive_TagFlowLayout else {return}
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layout.originxArray.removeAll()
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layout.originyArray.removeAll()
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layout.layoutAttributeds.removeAll()
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MPPositive_LoadCoreModel.shared.reloadSearchTags {
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[weak self] in
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guard let self = self else {return}
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historys = MPPositive_LoadCoreModel.shared.searchTags
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collectionView.reloadData()
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}
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}
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}
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//MARK: - collectionView
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extension MPPositive_SearchHistoryView: UICollectionViewDataSource, UICollectionViewDelegate, MPPositive_TagLayoutDelegate {
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func waterFlowLayout(_ layout: MPPositive_TagFlowLayout, indexPath: IndexPath) -> CGFloat {
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if indexPath.row < historys.count {
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let text = historys[indexPath.row].text ?? ""
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let textWidth = text.textAutoWidth(height: 11.5 * width, font: .systemFont(ofSize: 12 * width, weight: .medium)) + (43 * width)
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return textWidth
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}else {
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return 0
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}
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}
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func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
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return historys.count > 10 ? 10:historys.count
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}
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func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
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let cell = collectionView.dequeueReusableCell(withReuseIdentifier: MPPositive_SearchTagCollectionViewCellID, for: indexPath) as! MPPositive_SearchTagCollectionViewCell
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cell.setText(historys[indexPath.row].text ?? "")
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return cell
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}
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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MPPositive_Debouncer.shared.call {
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[weak self] in
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guard let self = self else {return}
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if let text = historys[indexPath.row].text, let block = selectedTagBlock {
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block(text)
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}
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}
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}
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}
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//MARK: - 宽度代理
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protocol MPPositive_TagLayoutDelegate {
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func waterFlowLayout(_ layout:MPPositive_TagFlowLayout,indexPath:IndexPath) -> CGFloat
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}
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//MARK: - 重写布局
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///标签layout
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class MPPositive_TagFlowLayout: UICollectionViewFlowLayout {
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//固定行高
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var rowHeight:CGFloat = 22 * width
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//宽度获取代理
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var delegate:MPPositive_TagLayoutDelegate?
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//x值数组
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var originxArray:[CGFloat]!
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//y值数组
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var originyArray:[CGFloat]!
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//记录的布局值
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var layoutAttributeds:[UICollectionViewLayoutAttributes] = []
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override init() {
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super.init()
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//列间距
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minimumInteritemSpacing = 8 * width
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//行间距
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minimumLineSpacing = 8 * width
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//内边距
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sectionInset = .init(top: 5 * width, left: 18 * width, bottom: 5 * width, right: 18 * width)
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scrollDirection = .vertical
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//初始化数组
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originxArray = [CGFloat]()
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originyArray = [CGFloat]()
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}
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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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//MARK: - 重写父类方法，实现瀑布流布局
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//当尺寸发生变化时，刷新布局
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override func shouldInvalidateLayout(forBoundsChange newBounds: CGRect) -> Bool {
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return true
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}
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override func prepare() {
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super.prepare()
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}
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//处理所有item的layoutAttributes
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override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
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let array = super.layoutAttributesForElements(in: rect)
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var mutArray = [UICollectionViewLayoutAttributes]()
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array?.forEach({ (attrs) in
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if let theAttrs = layoutAttributesForItem(at: attrs.indexPath) {
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mutArray.append(theAttrs)
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}
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})
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layoutAttributeds = mutArray
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return mutArray
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}
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//处理单个item的layoutAttributes
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override func layoutAttributesForItem(at indexPath: IndexPath) -> UICollectionViewLayoutAttributes? {
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//起始x值
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var x = sectionInset.left
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var y = sectionInset.top
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//判断获得前一个cell的x和y
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let preRow = indexPath.row - 1
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if preRow >= 0 {
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//不是第一个cell
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if originyArray.count > preRow {
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//更新x和y值
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x = originxArray[preRow]
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y = originyArray[preRow]
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}
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let preIndexPath = IndexPath(item: preRow, section: indexPath.section)
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//计算宽度
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let preWidth = delegate?.waterFlowLayout(self, indexPath: preIndexPath)
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x += preWidth! + minimumInteritemSpacing
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}
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var currentWidth = delegate?.waterFlowLayout(self, indexPath: indexPath)
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//保证每一个cell不超过最大宽度
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currentWidth = min(currentWidth!, collectionView!.frame.size.width - sectionInset.left - sectionInset.right)
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if x + currentWidth! > collectionView!.frame.size.width - sectionInset.right {
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//超出范围，换行
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x = self.sectionInset.left
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y += rowHeight + minimumLineSpacing
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}
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//创建属性
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let attrs = UICollectionViewLayoutAttributes.init(forCellWith: indexPath)
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attrs.frame = CGRect(x: x, y: y, width: currentWidth!, height: rowHeight)
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originxArray.insert(x, at: indexPath.row)
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originyArray.insert(y, at: indexPath.row)
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return attrs
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}
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}
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