From 8f15a851641d0e30e7459ffd4dea94a37f92e5b9 Mon Sep 17 00:00:00 2001
From: Svend <svend.jin@gmail.com>
Date: Sun, 30 Jun 2019 20:16:07 +0800
Subject: [PATCH] =?UTF-8?q?:bug:=20=E4=BF=AE=E5=A4=8D=E9=A6=96=E6=AC=A1?=
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---
 uPic/PreferencesWindow/HostPreferencesViewController.swift | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/uPic/PreferencesWindow/HostPreferencesViewController.swift b/uPic/PreferencesWindow/HostPreferencesViewController.swift
index cb6b395..4ef27cf 100644
--- a/uPic/PreferencesWindow/HostPreferencesViewController.swift
+++ b/uPic/PreferencesWindow/HostPreferencesViewController.swift
@@ -109,7 +109,9 @@ class HostPreferencesViewController: PreferencesViewController {
     @IBAction func saveButtonClicked(_ sender: Any?) {
         
         // 取消一下节流函数的定时器，确保不会在点击保存按钮后，再重新计划安装状态
-        self.hostConfigChangedDebouncedFunc(true)
+        if self.hostConfigChangedDebouncedFunc != nil {
+            self.hostConfigChangedDebouncedFunc(true)
+        }
         
         // 先让当前正在编辑的输入框触发一下 editEnd 事件，来 trim 一下本身
         self.blurEditingTextField()