如何使用Qt延迟执行循环 [英] How to give a delay in loop execution using Qt

问题描述

在我的应用程序中，我希望执行循环时，每次控件转移到循环时，每次执行都必须延迟特定的时间.我该怎么办?

In my application I want that when a loop is being executed, each time the control transfers to the loop, each execution must be delayed by a particular time. How can I do this?

推荐答案

EDIT(删除了错误的解决方案). 编辑(添加此其他选项):

EDIT (removed wrong solution). EDIT (to add this other option):

另一种使用它的方法是QThread的子类，因为它具有受保护的* sleep方法.

Another way to use it would be subclass QThread since it has protected *sleep methods.

QThread::usleep(unsigned long microseconds);
QThread::msleep(unsigned long milliseconds);
QThread::sleep(unsigned long second);

下面是创建您自己的* sleep方法的代码.

Here's the code to create your own *sleep method.

#include <QThread>    

class Sleeper : public QThread
{
public:
    static void usleep(unsigned long usecs){QThread::usleep(usecs);}
    static void msleep(unsigned long msecs){QThread::msleep(msecs);}
    static void sleep(unsigned long secs){QThread::sleep(secs);}
};

您可以通过以下方式调用它:

and you call it by doing this:

Sleeper::usleep(10);
Sleeper::msleep(10);
Sleeper::sleep(10);

这将相应地为您提供10微秒，10毫秒或10秒的延迟.如果底层操作系统计时器支持该分辨率.

This would give you a delay of 10 microseconds, 10 milliseconds or 10 seconds, accordingly. If the underlying operating system timers support the resolution.

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