如何在撰写中获得初始焦点

Question

如何在 Android 撰写应用程序上获得初始键盘焦点？

我的观点看起来像

Parent { Child { Button} }

我尝试在 Parent 可组合函数中实现它....

FocusRequester is not initialized. Here are some possible fixes:
                                                                                                
                                                                                                   
1. Remember the FocusRequester: val focusRequester = remember { FocusRequester() }
                                                                                                   
2. Did you forget to add a Modifier.focusRequester() ?
                                                                                                   
3. Are you attempting to request focus during composition? Focus requests should be made in response to some event. Eg Modifier.clickable { focusRequester.requestFocus() }

Answer 1

下面的代码就像一个魅力....

fun Modifier.requestInitialFocus() = composed {
    val first = remember { FocusRequester() }
    LaunchedEffect(first) { first.requestFocus() }
    focusRequester(first)
}

原来的：

在目标元素是直接子元素的可组合函数中实现它时，不会发生此错误......

所以在 Child 中实现它似乎是一个解决方案....