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テーブルビューで、下に引っ張ったら更新するやつ (RubyMotion)

Posted at

Twitterなど色んなアプリでおなじみ、Pull to Refresh機能の実装。

UITableViewControllerの中で、UIRefreshControlを設定する。また、更新時の処理をaddTarget:action:forControlEvents:を利用してセット。

items_controller.rb
class ItemsController < UITableViewController
  def viewDidLoad
    super

    # 略

    # refreshControlに、UIRefreshControlのインスタンスを設定
    self.refreshControl = UIRefreshControl.new.tap do |refresh|

      # 更新用のアクションを指定
      refresh.addTarget(self, action: 'refresh_items', forControlEvents: UIControlEventValueChanged)

    end

    # 略
  end

  def refresh_items

    # 更新開始の宣言
    self.refreshControl.beginRefreshing

    # (テーブル更新用の処理を記述)

    # 更新終了の宣言
    self.refreshControl.endRefreshing
  end
end

上記のように簡単に実装できる。めんどうなのは、更新処理の中身の方ですかねー。

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