<分区>
在我的应用程序中，有一个保存过程阻塞了我的 UI。优化还不够，所以我想用 QtConcurrent 实现线程，但我无法让它工作，尽管语法看起来很简单。
这就是现在的样子(原理):
Traymenu::Traymenu(QApplication *a){
//...
void save(){
//Get the savepath, choose if saving is necessary, and trigger saving
QString path = getSavePath();
saveNotes(path);
}
void saveNotes(QString savePath){
//save to the given path, takes quite a while, should be parallel
}
}
我尝试过的:
Traymenu::Traymenu(QApplication *a){
//...
void save(){
//Get the savepath, choose if saving is necessary, and trigger saving
QString path = getSavePath();
QFuture<void> result = QtConcurrent(saveNotes, path); //ERROR
}
void saveNotes(QString savePath){
//save to the given path
}
}
此外，在我的标题中，我包括了这个:
#include <QtConcurrent/QtConcurrentRun>
错误信息是
C:\App\appname\traymenu.cpp:584: Error: no matching function for call
to 'run(<unresolved overloaded function type>, QString&)'
QFuture<void> future = QtConcurrent::run(save, outputFilename);
^
我也试过这个:
QFuture<void> future = QtConcurrent::run(this, this->save(outputFilename));
这里有错误
C:\App\appname\traymenu.cpp:584: Error: invalid use of void expression
QFuture<void> future = QtConcurrent::run(this, this->save(outputFilename));
^
我的标题看起来像:
class Traymenu : public QSystemTrayIcon
{
Q_OBJECT
public:
Traymenu(QApplication *);
~Traymenu();
void save();
void saveNotes(QString);
//[...]
我做错了什么？