//
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// YYCollectionViewController.swift
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// EDriverProject
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//
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// Created by alvin_y on 2020/3/11.
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// Copyright © 2020 yangwang. All rights reserved.
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//
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import UIKit
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import DZNEmptyDataSet
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class YYCollectionViewController: YYViewController {
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enum EmptyType {
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case none
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case empty(image: UIImage?, title: String?)
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case refresh
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case error(errorDescription: String?, recoverySuggestion: String?)
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}
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var collectionView: UICollectionView!
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var emptyImage: UIImage?
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var emptyTitle: String?
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var emptyTitleColor: UIColor?
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var emptyTitleFont: UIFont?
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var emptyDescription: String?
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var emptyButonTitle: String?
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var emptyType: EmptyType = .none {
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didSet {
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switch emptyType {
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case .none:
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emptyImage = nil
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emptyTitle = nil
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emptyDescription = nil
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emptyButonTitle = nil
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emptyTitleColor = #colorLiteral(red: 0.4, green: 0.4, blue: 0.4, alpha: 1)
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emptyTitleFont = UIFont.systemFont(ofSize: 14)
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case .empty(let image, let title):
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emptyImage = image
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emptyTitle = title
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emptyDescription = nil
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emptyButonTitle = nil
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emptyTitleColor = #colorLiteral(red: 0.4, green: 0.4, blue: 0.4, alpha: 1)
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emptyTitleFont = UIFont.systemFont(ofSize: 14)
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case .refresh:
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emptyImage = #imageLiteral(resourceName: "load")
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emptyTitle = "正在载入..."
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emptyDescription = nil
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emptyButonTitle = nil
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emptyTitleColor = #colorLiteral(red: 0.4, green: 0.4, blue: 0.4, alpha: 1)
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emptyTitleFont = UIFont.systemFont(ofSize: 14)
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case .error(let errorDescription, let recoverySuggestion):
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emptyImage = nil
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emptyTitle = errorDescription
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emptyDescription = recoverySuggestion
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emptyButonTitle = "重试"
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emptyTitleColor = #colorLiteral(red: 0.4, green: 0.4, blue: 0.4, alpha: 1)
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emptyTitleFont = UIFont.systemFont(ofSize: 14)
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}
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collectionView.reloadEmptyDataSet()
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}
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}
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var retryHandler: (() -> Void)?
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var viewLayout = UICollectionViewFlowLayout()
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override func viewDidLoad() {
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super.viewDidLoad()
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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collectionView.reloadEmptyDataSet()
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}
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override func setupViews() {
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super.setupViews()
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viewLayout.minimumLineSpacing = 0
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viewLayout.minimumInteritemSpacing = 0
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collectionView = UICollectionView.init(frame: view.bounds, collectionViewLayout: viewLayout)
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collectionView.backgroundColor = #colorLiteral(red: 0.9647058824, green: 0.9647058824, blue: 0.9647058824, alpha: 1)
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collectionView.emptyDataSetSource = self
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collectionView.emptyDataSetDelegate = self
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view.addSubview(collectionView)
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emptyType = .empty(image: nil, title: "暂无数据")
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}
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}
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extension YYCollectionViewController: DZNEmptyDataSetSource {
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func verticalOffset(forEmptyDataSet scrollView: UIScrollView!) -> CGFloat {
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return -((navigationController?.navigationBar.bounds.height ?? 0) + UIApplication.shared.statusBarFrame.height) + 20
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}
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// func offset(forEmptyDataSet scrollView: UIScrollView!) -> CGPoint {
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// let y = -((navigationController?.navigationBar.bounds.height ?? 0) + UIApplication.shared.statusBarFrame.height) + 20
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// return CGPoint.init(x: 0, y: y)
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// }
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func image(forEmptyDataSet scrollView: UIScrollView!) -> UIImage! {
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return emptyImage ?? UIImage()
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}
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func title(forEmptyDataSet scrollView: UIScrollView!) -> NSAttributedString! {
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switch emptyType {
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case .refresh:
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return emptyTitle?.makeAttributedString(color: emptyTitleColor!, font: emptyTitleFont!)
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default:
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return emptyTitle?.makeAttributedString(color: emptyTitleColor!, font: emptyTitleFont!)
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}
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}
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func description(forEmptyDataSet scrollView: UIScrollView!) -> NSAttributedString! {
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return emptyDescription?.makeAttributedString(color: #colorLiteral(red: 0.4, green: 0.4, blue: 0.4, alpha: 1), font: UIFont.systemFont(ofSize: 14))
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}
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func buttonTitle(forEmptyDataSet scrollView: UIScrollView!, for state: UIControl.State) -> NSAttributedString! {
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return emptyButonTitle?.makeAttributedString(color: (state == .normal) ? #colorLiteral(red: 0.6, green: 0.6, blue: 0.6, alpha: 1) : #colorLiteral(red: 0.9215686275, green: 0.9215686275, blue: 0.9215686275, alpha: 1), font: UIFont.systemFont(ofSize: 14))
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}
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func buttonBackgroundImage(forEmptyDataSet scrollView: UIScrollView!, for state: UIControl.State) -> UIImage! {
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let margin = (UIScreen.main.bounds.width - 32 - 80) / 2
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let capInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
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let rectInsets = UIEdgeInsets(top: -19.0, left: -margin, bottom: -19.0, right: -margin)
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let image = emptyButonTitle == nil ? nil : ((state == .normal) ? #imageLiteral(resourceName: "button_background_icloud_normal") : #imageLiteral(resourceName: "button_background_icloud_highlight"))
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return image?.resizableImage(withCapInsets: capInsets, resizingMode: .stretch).withAlignmentRectInsets(rectInsets)
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}
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func imageAnimation(forEmptyDataSet scrollView: UIScrollView!) -> CAAnimation! {
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let animation = CABasicAnimation(keyPath: "transform")
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animation.fromValue = NSValue(caTransform3D: CATransform3DIdentity)
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animation.toValue = NSValue(caTransform3D: CATransform3DMakeRotation(.pi / 2, 0.0, 0.0, 1.0))
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animation.duration = 0.25
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animation.isCumulative = true
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animation.repeatCount = MAXFLOAT
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return animation;
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}
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}
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extension YYCollectionViewController: DZNEmptyDataSetDelegate {
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func emptyDataSetShouldAnimateImageView(_ scrollView: UIScrollView!) -> Bool {
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switch emptyType {
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case .refresh:
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return true
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default:
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return false
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}
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}
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func emptyDataSet(_ scrollView: UIScrollView!, didTap button: UIButton!) {
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switch emptyType {
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case .error(_, _):
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retryHandler?()
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default:
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break
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}
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}
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func emptyDataSetShouldAllowScroll(_ scrollView: UIScrollView!) -> Bool {
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return true
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}
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}
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