93 lines
3.7 KiB
Swift
93 lines
3.7 KiB
Swift
//
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// JXSegmentedIndicatorBackgroundView.swift
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// JXSegmentedView
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//
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// Created by jiaxin on 2018/12/28.
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// Copyright © 2018 jiaxin. All rights reserved.
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//
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import UIKit
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/// 不支持indicatorPosition、verticalOffset。默认垂直居中。
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open class JXSegmentedIndicatorBackgroundView: JXSegmentedIndicatorBaseView {
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@available(*, deprecated, renamed: "indicatorWidthIncrement")
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open var backgroundWidthIncrement: CGFloat = 20 {
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didSet {
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indicatorWidthIncrement = backgroundWidthIncrement
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}
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}
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open override func commonInit() {
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super.commonInit()
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indicatorWidthIncrement = 20
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indicatorHeight = 26
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indicatorColor = .lightGray
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indicatorPosition = .center
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verticalOffset = 0
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}
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open override func refreshIndicatorState(model: JXSegmentedIndicatorSelectedParams) {
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super.refreshIndicatorState(model: model)
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backgroundColor = indicatorColor
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layer.cornerRadius = getIndicatorCornerRadius(itemFrame: model.currentSelectedItemFrame)
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let width = getIndicatorWidth(itemFrame: model.currentSelectedItemFrame, itemContentWidth: model.currentItemContentWidth)
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let height = getIndicatorHeight(itemFrame: model.currentSelectedItemFrame)
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let x = model.currentSelectedItemFrame.origin.x + (model.currentSelectedItemFrame.size.width - width)/2
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var y: CGFloat = 0
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switch indicatorPosition {
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case .top:
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y = verticalOffset
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case .bottom:
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y = model.currentSelectedItemFrame.size.height - height - verticalOffset
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case .center:
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y = (model.currentSelectedItemFrame.size.height - height)/2 + verticalOffset
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}
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frame = CGRect(x: x, y: y, width: width, height: height)
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}
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open override func contentScrollViewDidScroll(model: JXSegmentedIndicatorTransitionParams) {
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super.contentScrollViewDidScroll(model: model)
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guard canHandleTransition(model: model) else {
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return
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}
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let rightItemFrame = model.rightItemFrame
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let leftItemFrame = model.leftItemFrame
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let percent = model.percent
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var targetWidth = getIndicatorWidth(itemFrame: leftItemFrame, itemContentWidth: model.leftItemContentWidth)
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let leftWidth = targetWidth
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let rightWidth = getIndicatorWidth(itemFrame: rightItemFrame, itemContentWidth: model.rightItemContentWidth)
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let leftX = leftItemFrame.origin.x + (leftItemFrame.size.width - leftWidth)/2
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let rightX = rightItemFrame.origin.x + (rightItemFrame.size.width - rightWidth)/2
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let targetX = JXSegmentedViewTool.interpolate(from: leftX, to: rightX, percent: CGFloat(percent))
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if indicatorWidth == JXSegmentedViewAutomaticDimension {
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targetWidth = JXSegmentedViewTool.interpolate(from: leftWidth, to: rightWidth, percent: CGFloat(percent))
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}
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self.frame.origin.x = targetX
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self.frame.size.width = targetWidth
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}
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open override func selectItem(model: JXSegmentedIndicatorSelectedParams) {
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super.selectItem(model: model)
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let width = getIndicatorWidth(itemFrame: model.currentSelectedItemFrame, itemContentWidth: model.currentItemContentWidth)
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var toFrame = self.frame
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toFrame.origin.x = model.currentSelectedItemFrame.origin.x + (model.currentSelectedItemFrame.size.width - width)/2
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toFrame.size.width = width
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if canSelectedWithAnimation(model: model) {
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UIView.animate(withDuration: scrollAnimationDuration, delay: 0, options: .curveEaseOut, animations: {
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self.frame = toFrame
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}) { (_) in
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}
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}else {
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frame = toFrame
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}
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}
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}
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