RangeSliderView.swift
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//
// RangeSliderView.swift
// Twear
//
// Created by yangbin on 2021/11/18.
//
import UIKit
struct SliderRange {
var index: Int = 0
var range: Range<CGFloat> = 0..<0.1
var stopX: CGFloat = 0
var value: Double = 0
}
protocol RangeSliderDelegate: NSObjectProtocol {
func sliderDidChanged(index: Int)
// func didClickInLabel(cell: ZCImageNewsTableCell, label: YYLabel, textRange: NSRange)
// func didClickInteractButton(cell: ZCImageNewsTableCell, sender: BadgeNumButton)
}
class RangeSliderView: UIView {
weak var delegate: RangeSliderDelegate?
@IBOutlet weak var leftConstraint: NSLayoutConstraint!
@IBOutlet weak var selectedView: UIButton!
private var startPointX: CGFloat = 0
private var endPointX: CGFloat = 0
private var scaleRanges: [SliderRange] = []
private var selectedIndex: Int = -1
private lazy var panGesture: UIPanGestureRecognizer = {
let pan = UIPanGestureRecognizer(target: self, action: #selector(sliderPanGestureChange(_:)))
return pan
}()
private lazy var tapGesture: UITapGestureRecognizer = {
let tap = UITapGestureRecognizer(target: self, action: #selector(sliderTapGestureChange(_:)))
return tap
}()
private var touchOffsetX: CGFloat = 0
override func awakeFromNib() {
super.awakeFromNib()
}
override init(frame: CGRect) {
super.init(frame: frame)
initFromNib()
setupUI()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
initFromNib()
setupUI()
}
private func initFromNib() {
if let view = Bundle.main.loadNibNamed("RangeSliderView", owner: self, options: nil)?.first as? UIView {
view.frame = bounds
self.addSubview(view)
}
}
private func setupUI() {
touchOffsetX = selectedView.frame.size.width/2
selectedView.addGestureRecognizer(panGesture)
selectedView.addGestureRecognizer(tapGesture)
}
// func setDrawSpace1(startPointX: CGFloat, endPointX: CGFloat, count: Int, startPanX: CGFloat = 0, endPanX: CGFloat = 0, imageName: String = "slider_green") {
// selectedView.setImage(UIImage(named: imageName), for: .normal)
// selectedView.setImage(UIImage(named: imageName), for: .highlighted)
//// layoutIfNeeded()
// guard count > 0 else {
// return
// }
// let w = selectedView.frame.size.width/2
// self.startPointX = startPointX-w
// self.endPointX = endPointX-w
// var scale: CGFloat = 0.5
// var rangeLen: CGFloat = 0
// if count > 1 {
// rangeLen = (endPointX - startPointX) / CGFloat(count-1)
// scale = rangeLen/2.0
// }
//
// scaleRanges = []
//
// for i in 0..<count {
// var r = SliderRange()
// r.index = i
// r.range = startPointX-w+(CGFloat(i)*rangeLen)-scale..<startPointX-w+(CGFloat(i)*rangeLen)+scale
// r.stopX = startPointX+(CGFloat(i)*rangeLen)-w
// scaleRanges.append(r)
// }
// if startPanX != 0 && endPanX != 0 {
// setPanRange(start: startPanX-w-scale, end: endPanX-w+scale)
// }
//
//
//// 0 1 2 3 4
//// 10 80
// }
//
func setDrawSpace(startPointX: CGFloat, endPointX: CGFloat, range: ClosedRange<Int>, points: [Double], imageName: String, isLast: Bool = false) {
selectedView.setImage(UIImage(named: imageName), for: .normal)
selectedView.setImage(UIImage(named: imageName), for: .highlighted)
let w = selectedView.frame.size.width/2
scaleRanges = []
guard points.count > 0 else {
leftConstraint.constant = startPointX-w
return
}
let rangeValue = range.upperBound - range.lowerBound
let scaleLen: CGFloat = (endPointX - startPointX)/CGFloat(rangeValue)
if points.count == 1 {
let point = points[0]
var r = SliderRange()
r.stopX = startPointX-w+point*scaleLen
r.value = point
scaleRanges.append(r)
} else {
for (i, point) in points.enumerated() {
var r = SliderRange()
let stopX = startPointX-w+point*scaleLen
r.stopX = stopX
r.index = i
r.value = point
if point == points.first {
let firstScale = (points[1]-points[0])/2 * scaleLen
r.range = stopX-firstScale-20..<stopX+firstScale
self.startPointX = startPointX-w-firstScale-20
} else if point == points.last {
let lastScale = (points[i]-points[i-1])/2 * scaleLen
r.range = stopX-lastScale..<stopX+lastScale+20
self.endPointX = endPointX-w-lastScale+20
} else {
let preScale = (points[i]-points[i-1])/2 * scaleLen
let nextScale = (points[i+1]-points[i])/2 * scaleLen
r.range = stopX-preScale..<stopX+nextScale
}
scaleRanges.append(r)
}
}
if isLast {
didSelectedValue(points[points.count-1])
} else {
didSelectedValue(points[0])
}
}
func setPanRange(start: CGFloat, end: CGFloat) {
startPointX = start
endPointX = end
}
func selectedIndex(_ index: Int) {
for sRange in scaleRanges {
if sRange.index == index {
leftConstraint.constant = sRange.stopX
delegate?.sliderDidChanged(index: index)
}
}
}
func didSelectedValue(_ value: Double) {
for sRange in scaleRanges {
if sRange.value == value {
leftConstraint.constant = sRange.stopX
delegate?.sliderDidChanged(index: sRange.index)
}
}
}
@objc
private func sliderPanGestureChange(_ sender: UIPanGestureRecognizer) {
var offsetX = sender.location(in: self).x
if sender.state == .began {
touchOffsetX = offsetX - selectedView.frame.origin.x
}
offsetX = offsetX - touchOffsetX
if offsetX <= startPointX {
return
}
if offsetX >= endPointX {
return
}
for (i, sRange) in scaleRanges.enumerated() {
if sRange.range.contains(offsetX) && selectedIndex != i {
leftConstraint.constant = sRange.stopX
selectedIndex = i
delegate?.sliderDidChanged(index: i)
}
}
}
@objc
private func sliderTapGestureChange(_ sender: UITapGestureRecognizer) {
// print(sender.location(in: selectedView).x)
}
/*
// Only override draw() if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func draw(_ rect: CGRect) {
// Drawing code
}
*/
}