C++ Qt中的GIF动画
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GIF animation in Qt
提问by Narek
I have used QGraphicsView, QGraphicsSceneclasses in order to show a picture in a widget like this:
我已经使用QGraphicsView,QGraphicsScene类来在这样的小部件中显示图片：
m_Scene->addPixmap(QPixmap(fileName));
m_View->setScene(m_Scene);
How I can show .gifanimation in the same scene?
如何在同一场景中显示.gif动画？
回答by mosg
I don't use GIF animation with QGraphicsViewor QGraphicsScene, I use it only in QDialog, but I think it's the same stuff, so here is my code:
我不将 GIF 动画与QGraphicsView或 一起QGraphicsScene使用，我只在 中使用它QDialog，但我认为这是相同的东西，所以这是我的代码：
QMovie *movie = new QMovie(":/images/other/images/16x16/loading.gif");
QLabel *processLabel = new QLabel(this);
processLabel->setMovie(movie);
movie->start();
My loading.gifI took from thislink.
我的loading.gif我从这个链接中获取。
PS: also check the examples from Qt SDK. They are really can help!
PS：还要检查 Qt SDK 中的示例。他们真的能帮上忙！
回答by Adelost
I put this here in case someone other than me runs into the same problem.
我把它放在这里以防我以外的其他人遇到同样的问题。
Problem
问题
The GIF would not load and isValid()returns false.
GIF 不会加载并isValid()返回false.
Code
代码
// Load animated GIF
QMovie* movie = new QMovie("foo.gif");
// Make sure the GIF was loaded correctly
if (!movie->isValid())
{
// Something went wrong :(
}
// Play GIF
QLabel* label = new QLabel(this);
label->setMovie(movie);
movie->start();
Solution
解决方案
To solve this, I had to put Qt's GIF-plugin qgif4.dllin a folder named imageformatsnext to my exe to be able to use GIFs.
为了解决这个问题，我不得不将 Qt 的 GIF 插件qgif4.dll放在imageformats我的 exe 旁边的文件夹中，以便能够使用 GIF。
The dll can be found under
/plugins/imageformats/qgif4.dll.
可以在 .dll 下找到该 dll
/plugins/imageformats/qgif4.dll。
回答by rubenvb
http://doc.qt.io/qt-5/qmovie.html
http://doc.qt.io/qt-5/qmovie.html
google and Qt docs are your friend. There's even have an example.
谷歌和 Qt 文档是你的朋友。甚至还有一个例子。
PS: unless you're in China, then google is unaccessible, but you'd have stuff like Bing and doc.qt.io.com.
PS：除非你在china，否则谷歌是无法访问的，但你会有像 Bing 和doc.qt.io.com这样的东西。
PS2: for a little more in-depth answer: you can use a QGraphicsProxyWidgetof a QLabelwhich has a QMovievia QLabel::setMovie. There's probably an easier/shorter way to do it.
PS2：更深入一点的答案：您可以使用 a QGraphicsProxyWidgetof a QLabel，其中有一个QMovievia QLabel::setMovie。可能有一种更简单/更短的方法来做到这一点。
回答by Subrata Das
Give the proper path of resource look like as below code
给资源的正确路径看起来像下面的代码
QMovie *movie=new QMovie(":/images/foo.gif");
if (!movie->isValid())
{
// Something went wrong :(
}
// Play GIF
label=new QLabel(this);
label->setGeometry(115,60,128,128);
label->setMovie(movie);
movie->start();
