Hailey
103 lines
3.6 KiB
Swift
103 lines
3.6 KiB
Swift
//
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// BottomSheetScrollView.swift
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// Pods
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//
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// Created by Hailey on 10/9/24.
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//
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class BottomSheetScrollView: UIScrollView, UIScrollViewDelegate {
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private let sheetView: SheetView
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private var previousHeight: CGFloat?
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private var beganDraggingY: CGFloat?
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init(sheetView: SheetView) {
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self.sheetView = sheetView
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super.init(frame: .zero)
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if let window = Util.getWindow() {
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self.frame = window.bounds
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let offset = window.safeAreaInsets.bottom * 3
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self.contentInset.bottom = offset
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self.verticalScrollIndicatorInsets.top = 20
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self.verticalScrollIndicatorInsets.bottom = offset
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}
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self.delegate = self
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NotificationCenter.default.addObserver(self,
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selector: #selector(keyboardWillShow(notification:)),
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name: UIResponder.keyboardWillShowNotification,
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object: nil)
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NotificationCenter.default.addObserver(self,
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selector: #selector(keyboardWillHide(notification:)),
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name: UIResponder.keyboardWillHideNotification,
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object: nil)
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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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deinit {
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NotificationCenter.default.removeObserver(self)
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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if let height = self.subviews.first?.frame.size.height,
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self.previousHeight != height,
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let window = self.window {
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let newDetent = self.sheetView.sheetVc.updateDetents(contentHeight: self.sheetView.clampHeight(height),
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preventExpansion: self.sheetView.preventExpansion)
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self.sheetView.selectedDetentIdentifier = newDetent
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self.contentSize = CGSize(width: window.bounds.width, height: height)
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self.previousHeight = height
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}
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}
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@objc func keyboardWillShow(notification: Notification) {
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if let keyboardFrame = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect {
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let keyboardHeight = keyboardFrame.height
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let newOffset = self.contentInset.bottom + keyboardHeight
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// We purposefully add keyboard height to content inset and only update
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// the scroll indicator inset
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self.contentInset.bottom = newOffset
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self.verticalScrollIndicatorInsets.bottom = keyboardHeight
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if let firstResponder = self.findFirstResponder(),
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let window = self.window {
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let position = firstResponder.convert(firstResponder.bounds,
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to: window)
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if position.minY > window.bounds.height - keyboardHeight {
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self.setContentOffset(CGPoint(x: 0, y: self.contentOffset.y + keyboardHeight),
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animated: true)
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}
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}
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}
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}
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@objc func keyboardWillHide(notification: Notification) {
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if let window = Util.getWindow() {
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let offset = window.safeAreaInsets.bottom * 3
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self.contentInset.bottom = offset
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self.verticalScrollIndicatorInsets.bottom = offset
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}
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}
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func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
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self.beganDraggingY = self.contentOffset.y
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}
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func scrollViewDidScroll(_ scrollView: UIScrollView) {
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if let beganDraggingY = self.beganDraggingY,
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self.contentOffset.y < beganDraggingY {
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if let firstResponder = self.findFirstResponder() {
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firstResponder.resignFirstResponder()
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}
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self.beganDraggingY = nil
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}
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}
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}
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