fix: 뒤로가기 시 흰화면 수정

모바일 뒤로가기 후 앱의 뒤로가기 버튼을 누를 경우
흰 화면이 뜨던 현상 수정.

Author: Richter3766

app/src/main/java/com/example/notimanager/presentation/ui/screen/DateFormatterScreen.kt

@@ -30,7 +30,9 @@ fun DateFormatterScreen(
             CommonTopAppBar(title) {
                 if (!isClicked) {
                     isClicked = true
-                    navController.popBackStack()
+                    if (navController.previousBackStackEntry != null) {
+                        navController.popBackStack()
+                    }
                 }
             }
         }

app/src/main/java/com/example/notimanager/presentation/ui/screen/FilteredListScreen.kt

@@ -33,8 +33,9 @@ fun FilteredListScreen(
             CommonTopAppBar(title = title, onBackClick = {
                 if (!isClicked){
                     isClicked = true
-
-                    navController.popBackStack()
+                    if (navController.previousBackStackEntry != null) {
+                        navController.popBackStack()
+                    }
                 }
 
             })

app/src/main/java/com/example/notimanager/presentation/ui/screen/NotificationScreen.kt

@@ -51,7 +51,9 @@ fun NotificationScreen(navController: NavController, appName: String = "", title
             CommonTopAppBar(title = title, onBackClick = {
                 if(!isClicked){
                     isClicked = true
-                    navController.popBackStack()
+                    if (navController.previousBackStackEntry != null) {
+                        navController.popBackStack()
+                    }
                 } }
             )
         }

app/src/main/java/com/example/notimanager/presentation/ui/screen/NotificationSubScreen.kt

@@ -50,9 +50,10 @@ fun NotificationSubScreen(navController: NavController, appName: String = "", su
             CommonTopAppBar(title = subText, onBackClick = {
                 if(!isClicked){
                     isClicked = true
-                    navController.popBackStack()
+                    if (navController.previousBackStackEntry != null) {
+                        navController.popBackStack()
+                    }
                 }
-
             })
         }
     ) { innerPadding ->

app/src/main/java/com/example/notimanager/presentation/ui/screen/SettingScreen.kt

@@ -30,7 +30,9 @@ fun SettingScreen(
             CommonTopAppBar(title){
                 if (!isClicked){
                     isClicked = true
-                    navController.popBackStack()
+                    if (navController.previousBackStackEntry != null) {
+                        navController.popBackStack()
+                    }
                 }
             }
         }

app/src/main/java/com/example/notimanager/presentation/ui/screen/TitleScreen.kt

@@ -1,5 +1,6 @@
 package com.example.notimanager.presentation.ui.screen
 
+import android.util.Log
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.HorizontalDivider
@@ -60,9 +61,9 @@ fun TitleScreen(navController: NavController, appName: String = ""){
             CommonTopAppBar(title = appName, onBackClick = {
                 if (!isClicked) {
                     isClicked = true
-
-                    navController.popBackStack()
-
+                    if (navController.previousBackStackEntry != null) {
+                        navController.popBackStack()
+                    }
                 }
             })
         }