QtTaskTree::RepeatIterator Class
class QtTaskTree::RepeatIterator用于 For 元素内部的重复迭代器。更多
| Header： | #include <qtasktree.h> |
| CMake： | find_package(Qt6 REQUIRED COMPONENTS TaskTree)target_link_libraries(mytarget PRIVATE Qt6::TaskTree) |
| qmake： | QT += tasktree |
| 自 | Qt 6.11 |
| 继承： | QtTaskTree::Iterator |
注意：该类中的所有函数都是可重入的。
公共函数
| RepeatIterator(qsizetype count) |
另请参见 Iterator,ForeverIterator,UntilIterator, 和ListIterator 。
成员函数文档
[explicit] RepeatIterator::RepeatIterator(qsizetype count)
为 For (RepeatIterator(count)) >> Do {} 构造构建重复迭代器。迭代器将重复count 次。
使用示例
static 常量 intmaxTries= 5;static 常量 intmaxNumber= 10;常量 intluckyNumber=QRandomGenerator().global()->bounded(maxNumber)； qDebug() << "Today's lucky number is:" << luckyNumber; qDebug() << "You have" << maxTries << "lottery tickets."; qDebug() << "Let's start the drawing..."; const autoonNumberCheck= [luckyNumber]{const intdrawnNumber=QRandomGenerator().global()->bounded(maxNumber)； qDebug() << "You have drawn:" << drawnNumber; returndrawnNumber==luckyNumber; };const autoonDone= [](DoneWith result) {if(result==DoneWith::Success) qDebug() << "You have won! Congratulations!"; else if(result==DoneWith::Error) qDebug() << "You have lost. Try again."; };constGroup recipe { For (RepeatIterator(maxTries))>>Do { stopOnSuccess,timeoutTask(1s)、 QSyncTask(onNumberCheck) },onGroupDone(onDone) };
QTaskTree 启动recipe 并成功完成时可能的输出：
Today's lucky number is: 6 You have 5 lottery tickets. Let's start the drawing... You have drawn: 9 You have drawn: 6 You have won! Congratulations!
如果以错误结束，输出可能如下：
Today's lucky number is: 8 You have 5 lottery tickets. Let's start the drawing... You have drawn: 1 You have drawn: 7 You have drawn: 6 You have drawn: 7 You have drawn: 2 You have lost. Try again.
© 2026 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.
