From bcbc652dc63c4c663f9d2c17bb60daea5e400961 Mon Sep 17 00:00:00 2001
From: lichaofan <lichaofan@uniontech.com>
Date: Thu, 9 Oct 2025 16:38:11 +0800
Subject: [PATCH] fix: Null pointer exception for ImageView.
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When using QTimer for delayed execution, it is necessary to check for null pointers to avoid null pointer exceptions.

fix: ImageView空指针异常。

使用QTimer延迟执行时，需要判断空指针，避免空指针异常。

Bug: https://pms.uniontech.com/bug-view-334545.html
---
 src/mainwidget.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/mainwidget.cpp b/src/mainwidget.cpp
index 6656008..dd4931a 100644
--- a/src/mainwidget.cpp
+++ b/src/mainwidget.cpp
@@ -377,7 +377,14 @@ void MainWidget::openImage(const QImage &img, const QString &name)
     setIcons(themeType);
     if (m_imageview) {
         m_imageview->openFilterImage(img);
+        // 使用 QPointer 检查对象是否还存在
+        QPointer<ImageView> imgSelf(m_imageview);
         QTimer::singleShot(100, [ = ] {
+            if (imgSelf.isNull()) {
+                qWarning() << "ImageView obj is destroyed";
+                return; // 对象已被销毁
+            }
+
             //分辨率大于window的采用适应窗口，没超过，则适应图片
             QRect rect1 = m_imageview->image().rect();
             if ((rect1.width() >= m_imageview->width() || rect1.height() >= m_imageview->height() - 150) && m_imageview->width() > 0 &&