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class ViewController: UIViewController { |
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@IBOutlet weak var tableView: UITableView! |
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var songsArray: [String] = ["就是我","會讀書","翅膀","星球","凍結","壓力","女兒家","星空下的吻","讓我心動的人","會有那麼一天","不懂","一開始（In the Beginning)","第二天堂","子彈列車","起床了（Morning Call)","豆漿油條","江南","害怕","天使心","森林浴（In the Woods)","精靈","相信無限","美人魚","距離"] |
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var searchSongs: [String] = [] |
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override func viewDidLoad() { |
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super.viewDidLoad() |
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naviSetting() |
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tableViewSetting() |
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} |
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override func didReceiveMemoryWarning() { |
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super.didReceiveMemoryWarning() |
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// Dispose of any resources that can be recreated. |
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} |
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func tableViewSetting() { |
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tableView.backgroundColor = UIColor.clear |
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tableView.delegate = self |
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tableView.dataSource = self |
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} |
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func naviSetting() { |
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navigationController?.navigationBar.prefersLargeTitles = true //Title顯示大字 |
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let searchController = UISearchController(searchResultsController: nil) //建立SearchController物件 |
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searchController.searchResultsUpdater = self //負責更新搜尋內容的物件 |
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searchController.dimsBackgroundDuringPresentation = false //搜尋開始畫面不會變暗 |
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navigationItem.searchController = searchController //把searchController設到Navigation上 |
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navigationItem.hidesSearchBarWhenScrolling = false //滾動不隱藏searchController |
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definesPresentationContext = true //有Navigation把預設值改為true |
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} |
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} |
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extension ViewController: UITableViewDelegate, UITableViewDataSource { |
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func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { |
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if navigationItem.searchController?.isActive == true { |
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return searchSongs.count //開始搜尋時顯示搜尋後的資料 |
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}else{ |
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return songsArray.count |
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} |
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} |
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func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { |
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let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) |
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cell.separatorInset = .zero |
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if navigationItem.searchController?.isActive == true { |
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cell.textLabel?.text = searchSongs[indexPath.row] //開始搜尋時顯示搜尋後的資料 |
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}else{ |
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cell.textLabel?.text = songsArray[indexPath.row] |
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} |
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return cell |
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} |
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func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { |
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return 65 //每個cell高度設為65 |
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} |
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} |
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extension ViewController: UISearchResultsUpdating { |
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func updateSearchResults(for searchController: UISearchController) { |
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let searchText = searchController.searchBar.text! //設定search文字 |
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self.searchSongs = self.songsArray.filter { (name) -> Bool in //從歌單中找出符合的歌 |
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return name.contains(searchText) |
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} |
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self.tableView.reloadData() //更新資料顯示在螢幕上 |
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} |
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} |
