在IOS 13.2 MFMailComposeViewController中，发送和取消按钮没有出现

Question

此外，当我们禁用键盘Im时，我也看不到输入的电子邮件ID。

我尝试过：

{
    "type": "record",
    "name": "soccer_venue_schema",
    "fields": 
  [
      {"name": "venue_id", "type": ["null","string"]},
      {"name": "venue_name", "type": ["null","string"]},
      {"name": "city_id", "type": ["null","string"]},
      {"name": "aud_capacity", "type": ["null","string"]}
  ]
}