2
2

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 5 years have passed since last update.

[Swifty]プロトコルを導入する

Posted at

テーブルビュー関連のコードを切り離す。

SourceTypeというプロトコルを作り、プロトコルエクステンションとして中身を実装する。

protocol SourceType: UITableViewDataSource {
    func insertTopRowIn(tableView: UITableView)
    func deleteRowAtIndexPath(indexPath: NSIndexPath, from tableView: UITableView)
}
 
extension SourceType {
    func insertTopRowIn(tableView: UITableView) {
        let indexPath = IndexPath(row: 0, section: 0)
        tableView.insertRows(at: [indexPath], with: .fade)
    }
    
    func deleteRowAtIndexPath(indexPath: NSIndexPath, from tableView: UITableView) {
        tableView.deleteRows(at: [indexPath as IndexPath], with: .fade)
    }
}

データソースクラスに組み込む。

class DataSource: NSObject, UITableViewDataSource, SourceType {
    private var document = Document.sharedInstance
    
    func addItemTo(tableView: UITableView) {
        if document.numberOfCards < 5 {
            document.addNewCard(at: 0)
            insertTopRowIn(tableView: tableView)
        }
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return document.numberOfCards
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! CardCell
        let card = document.getCard(at: indexPath.row)
        cell.fillWith(card: card)
        return cell
    }
    
    func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            document.deleteCard(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with: .fade)
        } else if editingStyle == .insert {
            // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
        }
    }
}

ソースコード
GitHubからどうぞ。

https://github.com/murakami/workbook/tree/master/ios/Hand - GitHub

関連情報
文化を調和させる

【Cocoa練習帳】
http://www.bitz.co.jp/weblog/

http://ameblo.jp/bitz/(ミラー・サイト)

2
2
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
2
2

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?