ios 类似于即时聊天界面的输入发送TextField工具条，可以随键盘的显示和输入法切换导致的键盘高度变化而自动变化TextField的位置。

Ios is similar to the input of the live chat interface. The TextField toolbar can be used to automatically change the position of the TextField as the keyboard height changes due to keyboard display and input method switching.