如何在 Jetpack Compose 的最后一个索引中启动 lazyRow?
How do I start a lazyRow in the last index on Jetpack Compose?
如何在启动我的应用程序时让 lazyRow 转到最后一个索引?
@Composable
fun MessageList(messages: List<Message>) {
val listState = rememberLazyListState()
// Remember a CoroutineScope to be able to launch
val coroutineScope = rememberCoroutineScope()
LazyColumn(state = listState) {
// ...
}
ScrollToTopButton(
onClick = {
coroutineScope.launch {
// Animate scroll to the first item
listState.animateScrollToItem(index = lastIndex)
}
}
)
}
更多内容请参考文档here
您可以对 LazyRow 做同样的事情
您可以使用方法 animateScrollToItem
:
类似于:
val itemsList = //... your list
val listState = rememberLazyListState()
// Remember a CoroutineScope to be able to launch
val coroutineScope = rememberCoroutineScope()
LazyColumn(state = listState) {
items(itemsList){
Text( "Item $it" )
}
}
要自动启动,您可以使用:
DisposableEffect(Unit) {
coroutineScope.launch {
listState.animateScrollToItem(index = itemsList.size-1)
}
onDispose { }
}
如何在启动我的应用程序时让 lazyRow 转到最后一个索引?
@Composable
fun MessageList(messages: List<Message>) {
val listState = rememberLazyListState()
// Remember a CoroutineScope to be able to launch
val coroutineScope = rememberCoroutineScope()
LazyColumn(state = listState) {
// ...
}
ScrollToTopButton(
onClick = {
coroutineScope.launch {
// Animate scroll to the first item
listState.animateScrollToItem(index = lastIndex)
}
}
)
}
更多内容请参考文档here
您可以对 LazyRow 做同样的事情
您可以使用方法 animateScrollToItem
:
类似于:
val itemsList = //... your list
val listState = rememberLazyListState()
// Remember a CoroutineScope to be able to launch
val coroutineScope = rememberCoroutineScope()
LazyColumn(state = listState) {
items(itemsList){
Text( "Item $it" )
}
}
要自动启动,您可以使用:
DisposableEffect(Unit) {
coroutineScope.launch {
listState.animateScrollToItem(index = itemsList.size-1)
}
onDispose { }
}