assert(students.size() > 1); int i=0; foreach (QString str ,students[++i]) { qDebug() << str; const QString studentID = str; for(auto& id : students){ auto studentIt = m_students.find(id); if(studentIt == m_students.end()){ qDebug() << "student is not exist"; return; } auto it = studentIt.value()->m_workMap.find(actName); if(it != studentIt.value()->m_workMap.end()){ qDebug() << "activity repeat"; return; } activity* act = new activity; act->m_name = actName; act->m_startTime = time; act->m_endTime = -1; act->m_type = type; act->m_data.push_back(data); act->m_week.push_back(week); studentIt.value()->m_workMap.insert(act->m_name, act); log(m_currentPeople, "发布了活动[" + actName + "]给[" + studentIt.value()->m_name + "]"); } }

在这段代码中，对 `i` 进行了自增操作，但是自增操作的位置不正确。如果想要从 `students[1]` 开始遍历，应该将 `i` 的初始值设为 `-1`，并将自增操作放在 `foreach` 循环内部。例如：

assert(students.size() > 1);
int i = -1;
foreach (QString str, students) {
    if (++i == 0) continue;  // 跳过第一个元素
    qDebug() << str;
    const QString studentID = str;
    for (auto& id : students) {
        auto studentIt = m_students.find(id);
        if (studentIt == m_students.end()) {
            qDebug() << "student is not exist";
            return;
        }
        auto it = studentIt.value()->m_workMap.find(actName);
        if (it != studentIt.value()->m_workMap.end()) {
            qDebug() << "activity repeat";
            return;
        }
        activity* act = new activity;
        act->m_name = actName;
        act->m_startTime = time;
        act->m_endTime = -1;
        act->m_type = type;
        act->m_data.push_back(data);
        act->m_week.push_back(week);
        studentIt.value()->m_workMap.insert(act->m_name, act);
        log(m_currentPeople, "发布了活动[" + actName + "]给[" + studentIt.value()->m_name + "]");
    }
}

这样就可以从 `students[1]` 开始遍历了。同时，还需要注意，在 `foreach` 循环中遍历 `students` 时，不再需要使用 `++i`，因为 `foreach` 会自动遍历所有元素。