import UIKit
import Dispatch
class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource { @objc dynamic var currendIndex: NSInteger = 0 var escapingCallback:(()-> () )? var tableView: UITableView? static var kDataSourceCount: Int = 80
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
//设置标题
self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor.white]
//设置导航栏
self.navigationController?.navigationBar.setBackgroundImage(UIImage(),for: UIBarMetrics.default)
//设置导航栏暗影透明
self.navigationController?.navigationBar.shadowImage = UIImage()
//设置状态栏样式
UIApplication.shared.statusBarStyle = UIStatusBarStyle.lightContent
//设置状态栏隐藏
UIApplication.shared.isStatusBarHidden = true
UIWindow
}
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.white
tableView = UITableView.init(frame: CGRect.init(x: 0, y: 0, width: kWidth, height: kHeight), style: .plain)
tableView?.delegate = self
tableView?.dataSource = self
self.view .addSubview(tableView!)
tableView?.sf_registerCell(cell: SFVideoListCell.self)
if #available(iOS 11.0, *) {
tableView?.contentInsetAdjustmentBehavior = UIScrollView.ContentInsetAdjustmentBehavior.never
} else {
self.automaticallyAdjustsScrollViewInsets = false;
}
DispatchQueue.main.asyncAfter(deadline: .now() + 1) { [self] in
self.tableView?.reloadData()
let curIndexPath: NSIndexPath = NSIndexPath.init(row:self.currendIndex, section: 0)
self.tableView?.scrollToRow(at: curIndexPath as IndexPath, at: UITableView.ScrollPosition.middle, animated: false)
self.addObserver(self, forKeyPath:"currendIndex", options: [NSKeyValueObservingOptions.new,NSKeyValueObservingOptions.initial], context: nil)
}
NotificationCenter.default.addObserver(self, selector: #selector(statusBarTouchBegin),
name: NSNotification.Name(rawValue: "StatusBarTouchBeginNotification"),
object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(applicationBecomeAction),
name: UIApplication.willEnterForegroundNotification,
object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(applicationEnterBackground),
name: UIApplication.didEnterBackgroundNotification,
object: nil)
}
@objc func statusBarTouchBegin() {
}
@objc func applicationBecomeAction() {
}
@objc func applicationEnterBackground() {
}
deinit {
tableView?.layer.removeAllAnimations()
NotificationCenter.default.removeObserver(self)
self.removeObserver(self, forKeyPath: "currentIndex")
}
}
extension ViewController{ func numberOfSections(in tableView: UITableView) -> Int { return 1 } func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { return kHeight }
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return ViewController.kDataSourceCount
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.sf_dequeueReusableCell(indexPath: indexPath) as SFVideoListCell
cell.currentIndex = indexPath.row
cell.backgroundColor = randomColor()
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("当前点击的是\(indexPath.row)行")
}
func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
DispatchQueue.main.async {
let translatedPoint = scrollView.panGestureRecognizer.translation(in: scrollView)
//UITableView禁止响应其他滑动手势
scrollView.panGestureRecognizer.isEnabled = false
if translatedPoint.y < -50 && self.currendIndex < (ViewController.kDataSourceCount - 1) {
self.currendIndex = self.currendIndex + 1 // //向上滑动 索引递增
}
if translatedPoint.y > 50 && self.currendIndex > 0 {
self.currendIndex = self.currendIndex - 1 // //向下滑动 索引递减
}
UIView.animate(withDuration: 0.15, delay: 0.0, options: UIView.AnimationOptions.curveEaseOut) {
//UItableView 滑动到其他指定cell
self.tableView?.scrollToRow(at: NSIndexPath.init(row: self.currendIndex, section: 0) as IndexPath, at: UITableView.ScrollPosition.top, animated: false)
} completion: {_ in
//UITableView 可以响应其他滑动手势
scrollView.panGestureRecognizer.isEnabled = true
}
}
}
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
if keyPath == "currendIndex" {
//获取当前显示的cell
let indexPath = NSIndexPath(row:self.currendIndex , section: 0)
var cell : SFVideoListCell = tableView?.cellForRow(at: indexPath as IndexPath) as! SFVideoListCell
// __weak typeof (cell) wcell = cell; // __weak typeof (self) wself = self; //用cell控制相关视频播放 print("indexPath",self.currendIndex)
}else{
super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
}
}
func randomColor() -> UIColor {
let hue: CGFloat = CGFloat(((arc4random() % 2) / 256))
let saturation: CGFloat = CGFloat(((arc4random() % 128) / 256)) + 0.5 // 0.5 to 1.0, away from white
let brightness: CGFloat = CGFloat(((arc4random() % 128) / 256)) + 0.5 // 0.5 to 1.0, away from black
return UIColor.init(hue: hue, saturation: saturation, brightness: brightness, alpha: 1)
}
}
