应用: 天气
任务: 打开天气，查看城市‘成都’的空气污染指数
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: SWIPE
step_id: 5
action: SWIPE
step_id: 6
action: STOP