底部菜单栏在进入子页面时隐藏

app/src/main/java/cn/airnan/a2fair/ui/navigation/AppNavigation.kt

@@ -1,10 +1,13 @@
 package cn.airnan.a2fair.ui.navigation
 
+import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.EnterTransition
 import androidx.compose.animation.ExitTransition
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.slideInHorizontally
+import androidx.compose.animation.slideInVertically
 import androidx.compose.animation.slideOutHorizontally
+import androidx.compose.animation.slideOutVertically
 import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.Icon
@@ -32,32 +35,47 @@ fun AppNavigation(
     val app = context.applicationContext as A2FairApplication
     val animDuration = context.resources.getInteger(android.R.integer.config_shortAnimTime)
 
+    val currentTopLevelDestination = appState.currentTopLevelDestination
+
     Scaffold(
         contentWindowInsets = WindowInsets(0, 0, 0, 0),
         bottomBar = {
+            AnimatedVisibility(
+                visible = currentTopLevelDestination != null,
+                enter = slideInVertically(initialOffsetY = { it }, animationSpec = tween(animDuration)),
+                exit = slideOutVertically(targetOffsetY = { it }, animationSpec = tween(animDuration))
+            ) {
                 AppBottomBar(
                     destinations = appState.topLevelDestinations,
                     onNavigateToDestination = appState::navigateToTopLevelDestination,
-                currentDestination = appState.currentTopLevelDestination
+                    currentDestination = currentTopLevelDestination
                 )
             }
+        }
     ) { padding ->
         NavHost(
             navController = appState.navController,
             startDestination = TopLevelDestination.TOKENS.route,
-            modifier = Modifier.padding(padding)
+            modifier = Modifier // removed padding from NavHost
         ) {
             composable(
                 route = TopLevelDestination.TOKENS.route,
                 enterTransition = { EnterTransition.None },
                 exitTransition = { ExitTransition.None }
+            ) {
+                androidx.compose.foundation.layout.Box(
+                    modifier = Modifier.padding(bottom = padding.calculateBottomPadding())
                 ) {
                     TokensScreen()
                 }
+            }
             composable(
                 route = TopLevelDestination.SETTINGS.route,
                 enterTransition = { EnterTransition.None },
                 exitTransition = { ExitTransition.None }
+            ) {
+                androidx.compose.foundation.layout.Box(
+                    modifier = Modifier.padding(bottom = padding.calculateBottomPadding())
                 ) {
                     SettingsScreen(
                     onNavigateToSecurity = { appState.navController.navigate("security") },
@@ -67,6 +85,7 @@ fun AppNavigation(
                     onNavigateToAbout = { appState.navController.navigate("about") }
                 )
                 }
+            }
             composable(
                 route = "security",
                 enterTransition = {