ios-guide-03.md

目標：

• 可以登入

步驟：

Step 1 :

修改 Gemfile

加入

gem "motion-authentication"
gem "ProMotion-XLForm"

• bundle install
• rake pod:install

Step 2 :

修改 app/screens/home_screen.rb

修改 on_road

def on_load
  if Auth.signed_in?
    set_nav_bar_button :right, title: "Logout", action: :sign_out_button
  else
    set_nav_bar_button :right, title: "Sign In", action: :sign_in_button
  end

  @jobs = []
  load_jobs
end

加入

def sign_out_button
  Auth.sign_out do
    open_tab_bar HomeScreen.new(nav_bar: true)
  end
end

def sign_in_button
  open SignInScreen.new(nav_bar: true)
end

Step 3 : 加入 SignInScreen

• potion g screen sign_in

class SignInScreen < PM::XLFormScreen
  title "Sign In"
  stylesheet SignInScreenStylesheet

  def form_data
    [
      {
        cells: [
          {
            title:       "Email",
            name:        :email,
            type:        :email,
            placeholder: "Enter your email",
            required:    true
          },
          {
            title:       "Password",
            name:        :password,
            type:        :password,
            placeholder: "Enter your password",
            required:    true
          },
          {
            title: "Sign In",
            name: :save,
            type: :button,
            on_click: lambda do |_cell|
              authenticate
            end
          }
        ]
      }
    ]
  end

  def authenticate
    Auth.sign_in(email: values["email"], password: values["password"]) do |response|
      if response.success?
        ApiClient.update_authorization_header(Auth.authorization_header)
        app.delegate.open_authenticated_root
      elsif response.object
        app.alert response.object["error"]
      else
        app.alert "Sorry, there was an error. #{response.error.localizedDescription}"
      end
    end
  end

  def will_animate_rotate(_orientation, _duration)
    reapply_styles
  end
end

Step 4 : 新增 auth

• touch app/models/auth.rb

class Auth < Motion::Authentication
  strategy DeviseTokenAuth
  sign_in_url "http://localhost:3000/users/sign_in"
end

Step 5 : compile

• rake