是可能使用QtConcurrent :: run（）与类的函数成员 [英] is it possible to use QtConcurrent::run() with a function member of a class

问题描述

我似乎无法将 QtConcurrent :: run（）与一个方法（类的函数成员）相关联，只使用一个简单的函数。我如何做到这一点？

I can't seem to be able to associate QtConcurrent::run() with a method (function member of a class) only with a simple function. How can I do this?

使用常规函数，我不能发出信号及其拖动。为什么会有人认为这是一个更好的替代 QThread 超越我，并希望一些输入。

With a regular function I cannot emit signals and its a drag. Why would anyone find this a better alternative to QThread is beyond me and would like some input.

推荐答案

是的，这是可能的（而且很容易）。

Yes, this is possible (and quite easy).

下面是一个例子（来自Qt文档）：

Here is an example (from the Qt documentation):

// call 'QStringList QString::split(const QString &sep, SplitBehavior behavior, Qt::CaseSensitivity cs) const' in a separate thread
QString string = ...;
QFuture<QStringList> future = QtConcurrent::run(string, &QString::split, QString(", "), QString::KeepEmptyParts, Qt::CaseSensitive);
...
QStringList result = future.result();

基本上，你所要做的就是将一个指针作为第一个参数传递给对象，

Basically, all you have to do is pass a pointer to the object as the first argument and the address of the method as the second argument (followed by any other arguments).

请参阅： https://doc.qt.io/qt-5/qtconcurrentrun.html

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