Develop Note: Swift

✢ Notes

  • Launch page
    1. Add a Launch Screen storyboard.
    2. Design Launch page on Launch Screen storyboard.
    3. Check up Launch setting of project.
      1. Open Info.plist.
      2. Find key: Launch screen interface file base name.
      3. Check the Launch screen is the storyboard that created for Launch screen.
        If create Launch Screen storyboard by add file in Xcode, the Launch screen will be set to Launch Screen storyboard you just added automatically. If not, set to the storyboard you want to use.
    4. Run ► again.

  • Button border

      button1.layer.cornerRadius = 4
  button2.layer.cornerRadius = 6
  //setup border style
  button1.layer.borderColor = UIColor.white.cgColor
  button1.layer.borderWidth = 2.0

  • TableView: UITableViewDelegate, UITableViewDataSource

    • Set how many rows in table
        func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
      return foods.count //data counts
  }

    • Draw every cell view

        func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
      let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! IngredientTableViewCell
      //Setup cell
      ....

      return cell
  }
    • Set selected style of cell
        func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
      //setup action when select cell
      //Show .actionSheet or .alert or any else
      ...
      //Show checkmark
      let cell = tableView.cellForRow(at: indexPath)
      ...
      cell?.accessoryType = self.selected ? .checkmark : .none
  }
    • Edit cell of table
        func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
      if editingStyle == .delete {
          //delete item of model
      }
  }

    • Edit swipe action on cell

        func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
      //swipe action: share
      let share = UITableViewRowAction(style: .default, title: "Share") {
          ...
      }
      //swipe action: add
      let add = ...

      return [share, add, ...]
  }


✢ References

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