工程文件QT+=coreguigreaterThan(QT_MAJOR_VERSION,4):QT+=widgetsCONFIG+=c++17#YoucanmakeyourcodefailtocompileifitusesdeprecatedAPIs.#Inordertodoso,uncommentthefollowingline.#DEFINES+=QT_DISABLE_DEPRECATED_BEFORE=0x

1///<summary>2///从图片中截取部分生成新图3///</summary>4///<paramname="sFromFilePath">原始图片</par

QPixmap  QImage voidScrollBox::setThumbnail(QPixmapimg){QPixmapbkPixmap=img.fromImage(img.toImage().scaled(size(),Qt::IgnoreAspectRatio,Qt

 我是在将图像格式转换为QImage后，把QImage发送给UI界面显示时出现的问题。 加了个深拷贝，就解决了。OutImage=QImage(buffer,width,height,QImage::Format_RGB88