Created
October 21, 2019 22:58
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リロードしたときにテキストが下にずれ込むっていう話
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| import UIKit | |
| import PlaygroundSupport | |
| class MyViewController : UIViewController { | |
| private let container: UIView = { | |
| let view = UIView(frame: .zero) | |
| view.backgroundColor = .white | |
| return view | |
| }() | |
| private let tableView: UITableView = { | |
| let tableView = UITableView(frame: .zero, style: .plain) | |
| tableView.translatesAutoresizingMaskIntoConstraints = false | |
| tableView.register(TableViewCell.self, forCellReuseIdentifier: "CELL") | |
| return tableView | |
| }() | |
| override func loadView() { | |
| tableView.dataSource = self | |
| container.addSubview(tableView) | |
| NSLayoutConstraint.activate([ | |
| tableView.topAnchor.constraint(equalTo: container.topAnchor), | |
| tableView.leftAnchor.constraint(equalTo: container.leftAnchor), | |
| tableView.rightAnchor.constraint(equalTo: container.rightAnchor), | |
| tableView.bottomAnchor.constraint(equalTo: container.bottomAnchor) | |
| ]) | |
| self.view = container | |
| } | |
| override func viewDidAppear(_ animated: Bool) { | |
| super.viewDidAppear(animated) | |
| // なにか遅延処理はしってその結果更新する | |
| DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) { | |
| self.tableView.reloadData() | |
| } | |
| } | |
| } | |
| extension MyViewController: UITableViewDataSource { | |
| func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { | |
| return 100 | |
| } | |
| func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { | |
| let cell = tableView.dequeueReusableCell(withIdentifier: "CELL", for: indexPath) as! TableViewCell | |
| cell.configure() | |
| return cell | |
| } | |
| } | |
| class TableViewCell: UITableViewCell { | |
| private let attributes: [NSAttributedString.Key: Any] = { | |
| let paragraph = NSMutableParagraphStyle() | |
| paragraph.minimumLineHeight = 22 | |
| paragraph.maximumLineHeight = 22 | |
| return [ | |
| .paragraphStyle: paragraph, | |
| .font: UIFont.systemFont(ofSize: 12.0) | |
| ] | |
| }() | |
| override func prepareForReuse() { | |
| super.prepareForReuse() | |
| textLabel?.text = "" | |
| } | |
| func configure() { | |
| textLabel?.attributedText = NSAttributedString( | |
| string: "にゃーん", | |
| attributes: attributes | |
| ) | |
| } | |
| } | |
| PlaygroundPage.current.liveView = MyViewController() |
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