Compose 弹出键盘

步骤一。定义键盘操作对象

val requester = remember {//用于请求焦点的对象
                FocusRequester()
            }
            val keyboard = LocalSoftwareKeyboardController.current//用于操作键盘的对象

步骤2 针对textFiled 来进行添加Modify 属性 focusRequester

BasicTextField(value = input,
                    
                    onValueChange = { value ->
                        onInput(value);
                    },
                    modifier = Modifier
                        .focusRequester(requester)

步骤3 请求焦点并弹出键盘

LaunchedEffect(key1 = Unit, block = {
                requester.requestFocus()//首次进入和重组页面请求焦点
                keyboard?.show()//首次进入页面弹出键盘，注意必须先获取焦点才能弹出键盘成功
            })