203 lines
10 KiB
Swift
203 lines
10 KiB
Swift
//
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// JXSegmentedTitleView.swift
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// JXSegmentedView
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//
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// Created by jiaxin on 2018/12/26.
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// Copyright © 2018 jiaxin. All rights reserved.
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//
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import UIKit
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open class JXSegmentedTitleDataSource: JXSegmentedBaseDataSource {
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/// title数组
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open var titles = [String]()
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/// 根据index配置cell的不同属性
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open var configuration: JXSegmentedTitleDynamicConfiguration?
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/// 如果将JXSegmentedView嵌套进UITableView的cell，每次重用的时候，JXSegmentedView进行reloadData时，会重新计算所有的title宽度。所以该应用场景，需要UITableView的cellModel缓存titles的文字宽度，再通过该闭包方法返回给JXSegmentedView。
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open var widthForTitleClosure: ((String)->(CGFloat))?
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/// label的numberOfLines
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open var titleNumberOfLines: Int = 1
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/// title普通状态的textColor
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open var titleNormalColor: UIColor = .black
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/// title选中状态的textColor
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open var titleSelectedColor: UIColor = .red
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/// title普通状态时的字体
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open var titleNormalFont: UIFont = UIFont.systemFont(ofSize: 15)
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/// title选中时的字体。如果不赋值，就默认与titleNormalFont一样
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open var titleSelectedFont: UIFont?
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/// title的颜色是否渐变过渡
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open var isTitleColorGradientEnabled: Bool = false
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/// title是否缩放。使用该效果时，务必保证titleNormalFont和titleSelectedFont值相同。
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open var isTitleZoomEnabled: Bool = false
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/// isTitleZoomEnabled为true才生效。是对字号的缩放，比如titleNormalFont的pointSize为10，放大之后字号就是10*1.2=12。
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open var titleSelectedZoomScale: CGFloat = 1.2
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/// title的线宽是否允许粗细。使用该效果时，务必保证titleNormalFont和titleSelectedFont值相同。
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open var isTitleStrokeWidthEnabled: Bool = false
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/// 用于控制字体的粗细（底层通过NSStrokeWidthAttributeName实现），负数越小字体越粗。
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open var titleSelectedStrokeWidth: CGFloat = -2
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/// title是否使用遮罩过渡
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open var isTitleMaskEnabled: Bool = false
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open override func preferredItemCount() -> Int {
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return titles.count
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}
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open override func preferredItemModelInstance() -> JXSegmentedBaseItemModel {
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return JXSegmentedTitleItemModel()
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}
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open override func preferredRefreshItemModel( _ itemModel: JXSegmentedBaseItemModel, at index: Int, selectedIndex: Int) {
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super.preferredRefreshItemModel(itemModel, at: index, selectedIndex: selectedIndex)
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guard let myItemModel = itemModel as? JXSegmentedTitleItemModel else {
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return
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}
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myItemModel.title = titles[index]
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myItemModel.textWidth = widthForTitle(myItemModel.title ?? "", index)
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myItemModel.titleNumberOfLines = innerTitleNumberOfLines(at: index)
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myItemModel.isSelectedAnimable = isSelectedAnimable
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myItemModel.titleNormalColor = innerTitleNormalColor(at: index)
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myItemModel.titleSelectedColor = innerTitleSelectedColor(at: index)
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myItemModel.titleNormalFont = innerTitleNormalFont(at: index)
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if let selectedFont = innerTitleSelectedFont(at: index) {
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myItemModel.titleSelectedFont = selectedFont
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} else {
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myItemModel.titleSelectedFont = innerTitleNormalFont(at: index)
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}
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myItemModel.isTitleZoomEnabled = isTitleZoomEnabled
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myItemModel.isTitleStrokeWidthEnabled = isTitleStrokeWidthEnabled
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myItemModel.isTitleMaskEnabled = isTitleMaskEnabled
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myItemModel.titleNormalZoomScale = 1
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myItemModel.titleSelectedZoomScale = titleSelectedZoomScale
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myItemModel.titleSelectedStrokeWidth = titleSelectedStrokeWidth
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myItemModel.titleNormalStrokeWidth = 0
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if index == selectedIndex {
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myItemModel.titleCurrentColor = innerTitleSelectedColor(at: index)
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myItemModel.titleCurrentZoomScale = titleSelectedZoomScale
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myItemModel.titleCurrentStrokeWidth = titleSelectedStrokeWidth
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}else {
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myItemModel.titleCurrentColor = innerTitleNormalColor(at: index)
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myItemModel.titleCurrentZoomScale = 1
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myItemModel.titleCurrentStrokeWidth = 0
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}
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}
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open func widthForTitle(_ title: String, _ index: Int) -> CGFloat {
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if widthForTitleClosure != nil {
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return widthForTitleClosure!(title)
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}else {
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let textWidth = NSString(string: title).boundingRect(with: CGSize(width: CGFloat.infinity, height: CGFloat.infinity), options: [.usesFontLeading, .usesLineFragmentOrigin], attributes: [NSAttributedString.Key.font : innerTitleNormalFont(at: index)], context: nil).size.width
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return CGFloat(ceilf(Float(textWidth)))
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}
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}
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/// 因为该方法会被频繁调用，所以应该在`preferredRefreshItemModel( _ itemModel: JXSegmentedBaseItemModel, at index: Int, selectedIndex: Int)`方法里面，根据数据源计算好文字宽度，然后缓存起来。该方法直接使用已经计算好的文字宽度即可。
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open override func preferredSegmentedView(_ segmentedView: JXSegmentedView, widthForItemAt index: Int) -> CGFloat {
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var width = super.preferredSegmentedView(segmentedView, widthForItemAt: index)
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if itemWidth == JXSegmentedViewAutomaticDimension {
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width += (dataSource[index] as! JXSegmentedTitleItemModel).textWidth
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}else {
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width += itemWidth
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}
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return width
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}
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//MARK: - JXSegmentedViewDataSource
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open override func registerCellClass(in segmentedView: JXSegmentedView) {
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segmentedView.collectionView.register(JXSegmentedTitleCell.self, forCellWithReuseIdentifier: "cell")
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}
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open override func segmentedView(_ segmentedView: JXSegmentedView, cellForItemAt index: Int) -> JXSegmentedBaseCell {
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let cell = segmentedView.dequeueReusableCell(withReuseIdentifier: "cell", at: index)
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return cell
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}
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public override func segmentedView(_ segmentedView: JXSegmentedView, widthForItemContentAt index: Int) -> CGFloat {
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let model = dataSource[index] as! JXSegmentedTitleItemModel
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if isTitleZoomEnabled {
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return model.textWidth*model.titleCurrentZoomScale
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}else {
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return model.textWidth
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}
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}
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open override func refreshItemModel(_ segmentedView: JXSegmentedView, leftItemModel: JXSegmentedBaseItemModel, rightItemModel: JXSegmentedBaseItemModel, percent: CGFloat) {
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super.refreshItemModel(segmentedView, leftItemModel: leftItemModel, rightItemModel: rightItemModel, percent: percent)
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guard let leftModel = leftItemModel as? JXSegmentedTitleItemModel, let rightModel = rightItemModel as? JXSegmentedTitleItemModel else {
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return
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}
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if isTitleZoomEnabled && isItemTransitionEnabled {
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leftModel.titleCurrentZoomScale = JXSegmentedViewTool.interpolate(from: leftModel.titleSelectedZoomScale, to: leftModel.titleNormalZoomScale, percent: CGFloat(percent))
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rightModel.titleCurrentZoomScale = JXSegmentedViewTool.interpolate(from: rightModel.titleNormalZoomScale, to: rightModel.titleSelectedZoomScale, percent: CGFloat(percent))
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}
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if isTitleStrokeWidthEnabled && isItemTransitionEnabled {
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leftModel.titleCurrentStrokeWidth = JXSegmentedViewTool.interpolate(from: leftModel.titleSelectedStrokeWidth, to: leftModel.titleNormalStrokeWidth, percent: CGFloat(percent))
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rightModel.titleCurrentStrokeWidth = JXSegmentedViewTool.interpolate(from: rightModel.titleNormalStrokeWidth, to: rightModel.titleSelectedStrokeWidth, percent: CGFloat(percent))
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}
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if isTitleColorGradientEnabled && isItemTransitionEnabled {
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leftModel.titleCurrentColor = JXSegmentedViewTool.interpolateThemeColor(from: leftModel.titleSelectedColor, to: leftModel.titleNormalColor, percent: percent)
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rightModel.titleCurrentColor = JXSegmentedViewTool.interpolateThemeColor(from:rightModel.titleNormalColor , to:rightModel.titleSelectedColor, percent: percent)
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}
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}
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open override func refreshItemModel(_ segmentedView: JXSegmentedView, currentSelectedItemModel: JXSegmentedBaseItemModel, willSelectedItemModel: JXSegmentedBaseItemModel, selectedType: JXSegmentedViewItemSelectedType) {
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super.refreshItemModel(segmentedView, currentSelectedItemModel: currentSelectedItemModel, willSelectedItemModel: willSelectedItemModel, selectedType: selectedType)
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guard let myCurrentSelectedItemModel = currentSelectedItemModel as? JXSegmentedTitleItemModel, let myWillSelectedItemModel = willSelectedItemModel as? JXSegmentedTitleItemModel else {
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return
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}
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myCurrentSelectedItemModel.titleCurrentColor = myCurrentSelectedItemModel.titleNormalColor
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myCurrentSelectedItemModel.titleCurrentZoomScale = myCurrentSelectedItemModel.titleNormalZoomScale
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myCurrentSelectedItemModel.titleCurrentStrokeWidth = myCurrentSelectedItemModel.titleNormalStrokeWidth
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myCurrentSelectedItemModel.indicatorConvertToItemFrame = CGRect.zero
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myWillSelectedItemModel.titleCurrentColor = myWillSelectedItemModel.titleSelectedColor
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myWillSelectedItemModel.titleCurrentZoomScale = myWillSelectedItemModel.titleSelectedZoomScale
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myWillSelectedItemModel.titleCurrentStrokeWidth = myWillSelectedItemModel.titleSelectedStrokeWidth
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}
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// MARK: - Configuration
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private func innerTitleNumberOfLines(at index: Int) -> Int {
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if let configuration {
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return configuration.titleNumberOfLines(at: index)
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} else {
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return titleNumberOfLines
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}
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}
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private func innerTitleNormalColor(at index: Int) -> UIColor {
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if let configuration {
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return configuration.titleNormalColor(at: index)
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} else {
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return titleNormalColor
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}
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}
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private func innerTitleSelectedColor(at index: Int) -> UIColor {
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if let configuration {
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return configuration.titleSelectedColor(at: index)
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} else {
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return titleSelectedColor
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}
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}
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private func innerTitleNormalFont(at index: Int) -> UIFont {
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if let configuration {
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return configuration.titleNormalFont(at: index)
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} else {
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return titleNormalFont
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}
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}
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private func innerTitleSelectedFont(at index: Int) -> UIFont? {
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if let configuration {
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return configuration.titleSelectedFont(at: index)
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} else {
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return titleSelectedFont
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}
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}
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}
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