From 3aa5aa1bc01782274228cbf9156e6dcb56a50fd1 Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Sun, 19 Jan 2020 23:16:36 -0500
Subject: [PATCH] Fix weird crashes when switching accounts

---
 .../Preferences/PreferencesNavigationController.swift  | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Tusker/Screens/Preferences/PreferencesNavigationController.swift b/Tusker/Screens/Preferences/PreferencesNavigationController.swift
index 5b93c231..3b4d7b4f 100644
--- a/Tusker/Screens/Preferences/PreferencesNavigationController.swift
+++ b/Tusker/Screens/Preferences/PreferencesNavigationController.swift
@@ -10,6 +10,8 @@ import UIKit
 import SwiftUI
 
 class PreferencesNavigationController: UINavigationController {
+    
+    private var isSwitchingAccounts = false
 
     init(mastodonController: MastodonController) {
         let view = PreferencesView()
@@ -33,8 +35,10 @@ class PreferencesNavigationController: UINavigationController {
     override func viewWillDisappear(_ animated: Bool) {
         super.viewWillDisappear(animated)
         
-        // workaround for onDisappear not being called when a modally presented UIHostingController is dismissed
-        NotificationCenter.default.post(name: .preferencesChanged, object: nil)
+        if !isSwitchingAccounts {
+            // workaround for onDisappear not being called when a modally presented UIHostingController is dismissed
+            NotificationCenter.default.post(name: .preferencesChanged, object: nil)
+        }
     }
 
     @objc func donePressed() {
@@ -55,6 +59,7 @@ class PreferencesNavigationController: UINavigationController {
     @objc func activateAccount(_ notification: Notification) {
         let account = notification.userInfo!["account"] as! LocalData.UserAccountInfo
         let sceneDelegate = self.view.window!.windowScene!.delegate as! SceneDelegate
+        isSwitchingAccounts = true
         dismiss(animated: true) { // dismiss preferences
             sceneDelegate.activateAccount(account)
         }
@@ -62,6 +67,7 @@ class PreferencesNavigationController: UINavigationController {
     
     @objc func userLoggedOut() {
         let sceneDelegate = self.view.window!.windowScene!.delegate as! SceneDelegate
+        isSwitchingAccounts = true
         dismiss(animated: true) { // dismiss preferences
             sceneDelegate.logoutCurrent()
         }