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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,223 @@ | ||
| // | ||
| // JBSnackBar.swift | ||
| // JBSnackBar | ||
| // | ||
| // Created by John N Blanchard on 2/2/19. | ||
| // Copyright © 2019 John Norman Blanchard. All rights reserved. | ||
| // | ||
|
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| import UIKit | ||
|
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| public class JNBBottombar: NSObject { | ||
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| public static let shared = JNBBottombar() | ||
| public var hitBoxSize = CGFloat(38) | ||
| public var animationOption: UIView.AnimationOptions = .transitionCurlUp | ||
|
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| private var alertView: UIView? = nil | ||
| private var innerAlertView: UIView? = nil | ||
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| private var showingViewController: UIViewController? = nil | ||
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| private var initialFrame: CGRect? | ||
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| override init() { | ||
| super.init() | ||
| } | ||
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| private func topViewController() -> UIViewController? { | ||
| if showingViewController != nil { | ||
| return showingViewController | ||
| } else { | ||
| return getTopViewController() | ||
| } | ||
| } | ||
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| private func getBottomConstraint(from: UIViewController? = nil) -> NSLayoutConstraint? { | ||
| guard let topVC = from ?? topViewController() else { return nil } | ||
| return topVC.view?.constraints.first(where: { (temp) -> Bool in | ||
| return (temp.firstAnchor == alertView?.bottomAnchor || temp.secondAnchor == alertView?.bottomAnchor) && (temp.firstAnchor == topVC.view.safeAreaLayoutGuide.bottomAnchor || temp.secondAnchor == topVC.view.safeAreaLayoutGuide.bottomAnchor) || (temp.firstAnchor == alertView?.bottomAnchor || temp.secondAnchor == alertView?.bottomAnchor) && (temp.firstAnchor == topVC.view.bottomAnchor || temp.secondAnchor == topVC.view.bottomAnchor) | ||
| }) | ||
| } | ||
|
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||
| private func getHeightConstraint() -> NSLayoutConstraint? { | ||
| guard let topVC = topViewController() else { return nil } | ||
| return topVC.view?.constraints.first(where: { (temp) -> Bool in | ||
| return temp.firstAnchor == alertView?.heightAnchor || temp.secondAnchor == alertView?.heightAnchor | ||
| }) | ||
| } | ||
|
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| private func getTopViewController() -> UIViewController? { | ||
| if var topController = UIApplication.shared.keyWindow?.rootViewController { | ||
| while let presentedViewController = topController.presentedViewController { | ||
| topController = presentedViewController | ||
| } | ||
| return topController | ||
| } | ||
| return nil | ||
| } | ||
|
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||
| @objc private func handle(pan: UIPanGestureRecognizer) { | ||
| guard let alert = alertView else { return } | ||
| guard let topvc = topViewController() else { return } | ||
| guard let bottomConstraint = getBottomConstraint() else { return } | ||
| let location = pan.location(in: topvc.view) | ||
| guard abs(location.y - alert.frame.origin.y) < hitBoxSize else { return } | ||
|
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| func adjust() { | ||
| guard location.y > topvc.view.frame.height - alert.frame.height else { return } | ||
| alert.frame.origin = CGPoint(x: alert.frame.origin.x, y: location.y) | ||
| UIView.animate(withDuration: 0.35, delay: 0, usingSpringWithDamping: 1.2, initialSpringVelocity: 1.5, options: .beginFromCurrentState, animations: { | ||
| topvc.view.layoutSubviews() | ||
| }, completion: { (completed) in | ||
| guard completed else { return } | ||
| }) | ||
| } | ||
|
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| func ended() { | ||
| UIView.animate(withDuration: 1.25, delay: 0, usingSpringWithDamping: 1.2, initialSpringVelocity: 1.5, options: .beginFromCurrentState, animations: { | ||
| alert.frame = pan.location(in: topvc.view).y > topvc.view.frame.height - ((alert.frame.height+20)/2) ? CGRect(x: 0, y: topvc.view.frame.height+150, width: topvc.view.frame.width, height: alert.frame.height) : self.initialFrame ?? CGRect.zero | ||
| topvc.view.layoutSubviews() | ||
| }, completion: { (completed) in | ||
| guard completed else { return } | ||
| }) | ||
| } | ||
|
|
||
| switch pan.state { | ||
| case .began: | ||
| initialFrame = alert.frame | ||
| adjust() | ||
| case .changed: | ||
| adjust() | ||
| case .cancelled, .failed: | ||
| ended() | ||
| case .ended: | ||
| ended() | ||
| case .possible: | ||
| break | ||
| } | ||
| } | ||
|
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| public func show(text: String, detailImage: UIImage? = nil) { | ||
| if detailImage == nil { | ||
| let label = UILabel(frame: CGRect.zero) | ||
| label.textAlignment = .center | ||
| label.font = UIFont.systemFont(ofSize: 25) | ||
| label.textColor = UIColor.white | ||
| label.text = text | ||
| label.adjustsFontSizeToFitWidth = true | ||
| label.minimumScaleFactor = 0.4 | ||
| showWith(contentView: label) | ||
| } else { | ||
| let label = UILabel(frame: CGRect.zero) | ||
| label.textAlignment = .center | ||
| label.font = UIFont.boldSystemFont(ofSize: 25) | ||
| label.textColor = UIColor.white | ||
| label.text = text | ||
| label.adjustsFontSizeToFitWidth = true | ||
| label.minimumScaleFactor = 0.4 | ||
|
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| let imageView = UIImageView(image: detailImage) | ||
| imageView.contentMode = .scaleAspectFit | ||
|
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| let stackView = UIStackView(arrangedSubviews: [imageView, label]) | ||
| stackView.spacing = 10 | ||
| stackView.distribution = .fillProportionally | ||
| stackView.alignment = .center | ||
| stackView.axis = .horizontal | ||
|
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||
| imageView.widthAnchor.constraint(equalToConstant: 45).isActive = true | ||
| showWith(contentView: stackView, contentInset: UIEdgeInsets(top: 0, left: -16, bottom: 0, right: -16)) | ||
| } | ||
| } | ||
|
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| private func hide(onCompletion: @escaping () -> ()) { | ||
| guard let topVC = topViewController(), let alert = alertView, let bottom = getBottomConstraint() else { return } | ||
| bottom.constant = alert.frame.height+150 | ||
| UIView.animate(withDuration: 0.35, delay: 0, usingSpringWithDamping: 0.1, initialSpringVelocity: 0.75, options: .transitionCurlDown, animations: { | ||
| topVC.view.layoutSubviews() | ||
| }) { (completed) in | ||
| guard completed else { return } | ||
| alert.removeFromSuperview() | ||
| onCompletion() | ||
| } | ||
| } | ||
|
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| public func hide(completion: ((Bool) -> ())? = nil) { | ||
| hide { completion?(true) } | ||
| } | ||
|
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| public func showWith(contentView: UIView? = nil, | ||
| height: CGFloat = 80, | ||
| contentBackgroundColor: UIColor = UIColor(white: 0, alpha: 0.8), | ||
| cornerRadius: CGFloat = 0, | ||
| screenInsets: UIEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0), | ||
| contentInset: UIEdgeInsets = UIEdgeInsets(top: -5, left: -8, bottom: 0, right: -8), | ||
| shadowColor: CGColor = UIColor.clear.cgColor, | ||
| shadowOpacity: Float = 0, | ||
| shadowOffset: CGSize = CGSize.zero, | ||
| shadowRadius: CGFloat = 0, | ||
| bottomAnchor: NSLayoutYAxisAnchor? = nil, | ||
| borderWidth: CGFloat = 0, | ||
| borderColor: CGColor = UIColor.clear.cgColor, | ||
| completion: ((Bool) -> Void)? = nil ) { | ||
|
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| guard let topVC = topViewController() else { return } | ||
| showingViewController = topVC | ||
|
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| func createSnackBar() { | ||
| alertView = UIView(frame: CGRect(x: 0, y: topVC.view.frame.size.height+height, width: topVC.view.frame.size.width, height: height)) | ||
| alertView?.isUserInteractionEnabled = true | ||
| alertView?.backgroundColor = contentBackgroundColor | ||
| alertView?.translatesAutoresizingMaskIntoConstraints = false | ||
| alertView?.clipsToBounds = true | ||
| alertView?.layer.cornerRadius = cornerRadius | ||
| alertView?.layer.masksToBounds = false | ||
| alertView?.layer.shadowColor = shadowColor | ||
| alertView?.layer.shadowOpacity = shadowOpacity | ||
| alertView?.layer.shadowOffset = shadowOffset | ||
| alertView?.layer.shadowRadius = shadowRadius | ||
| alertView?.layer.borderColor = borderColor | ||
| alertView?.layer.borderWidth = borderWidth | ||
| topVC.view.addSubview(alertView!) | ||
| let pgr = UIPanGestureRecognizer(target: self, action: #selector(handle(pan:))) | ||
| alertView?.addGestureRecognizer(pgr) | ||
| alertView?.leadingAnchor.constraint(equalTo: topVC.view.leadingAnchor, constant: screenInsets.left).isActive = true | ||
| alertView?.trailingAnchor.constraint(equalTo: topVC.view.trailingAnchor, constant: screenInsets.right).isActive = true | ||
| alertView?.heightAnchor.constraint(equalToConstant: height).isActive = true | ||
| alertView?.bottomAnchor.constraint(equalTo: bottomAnchor ?? topVC.view.safeAreaLayoutGuide.bottomAnchor, constant: screenInsets.bottom).isActive = true | ||
| if let tempView = contentView { | ||
| for tempView in alertView?.subviews ?? [] { | ||
| tempView.removeFromSuperview() | ||
| } | ||
| alertView?.layoutSubviews() | ||
| innerAlertView = tempView | ||
| tempView.translatesAutoresizingMaskIntoConstraints = false | ||
| alertView?.addSubview(tempView) | ||
| tempView.leadingAnchor.constraint(equalTo: alertView!.leadingAnchor, constant: (-1)*contentInset.left).isActive = true | ||
| tempView.topAnchor.constraint(equalTo: alertView!.topAnchor, constant: (-1)*contentInset.top).isActive = true | ||
| tempView.trailingAnchor.constraint(equalTo: alertView!.trailingAnchor, constant: contentInset.right).isActive = true | ||
| tempView.bottomAnchor.constraint(equalTo: alertView!.bottomAnchor, constant: (-1)*contentInset.bottom).isActive = true | ||
| } | ||
| UIView.animate(withDuration: 1.35, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .transitionCurlUp, animations: { | ||
| topVC.view.layoutSubviews() | ||
| }) { (completed) in | ||
| completion?(completed) | ||
| } | ||
| } | ||
|
|
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| if alertView == nil { | ||
| createSnackBar() | ||
| } else { | ||
| guard let _ = getBottomConstraint() else { | ||
| createSnackBar() | ||
| return | ||
| } | ||
| // would like to have reuse optimization for showing the same view over | ||
| // unless fall back on this hide call and remake the snackbar. | ||
| hide(onCompletion: createSnackBar) | ||
| } | ||
| } | ||
| } | ||
|
|
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