flutter textfield

Release the cursor

FocusScope.of(context).unfocus()

Input Type

keyboardType: TextInputType.number,

Lower right corner of the keyboard keys type

textInputAction: TextInputAction.done,

The cursor color

cursorColor: Colors.orange,

Remove the underscore

decoration: InputDecoration(
    hintText: '请输入验证码',  //placeholder
    border: InputBorder.none, //隐藏下划线
),

Input limit

inputFormatters: [
     LengthLimitingTextInputFormatter(11)  //最多允许输入11位
    ],