在Jetpack中请求关注TextField撰写 [英] Request Focus on TextField in jetpack compose

问题描述

如何在jetpack撰写中自动关注文本字段.当我单击文本字段并开始在其上键入时.同时，当我单击后退"按钮时，然后当我尝试单击文本字段时，什么也没有发生.

How to auto focus on textfield in jetpack compose. When i click on textfield and start typing on it. Meantime when i click back button,then when i'm try to click on textfield, nothing happens.

val textState = remember { mutableStateOf(TextFieldValue()) }
TextField(
    modifier = Modifier.fillMaxWidth(),
    value = textState.value,
    onValueChange = { value : TextFieldValue ->
        textState.value = value
    }
)

推荐答案

发布问题的最新答案(API在Compose Beta中重命名)

Posting an updated Answer to the question (APIs were renamed in Compose Beta)

@Composable
fun AutoFocusingText() {
    var value by mutableStateOf("Enter Text")
    val focusRequester = remember { FocusRequester() }
    TextField(
        value = value, 
        onValueChange = { value = it },
        modifier = Modifier.focusRequester(focusRequester)
    )
    
    DisposableEffect(Unit) {
        focusRequester.requestFocus()
        onDispose { }
    }
}

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