c++qt设计模式第2版程序测试方法-优快云博客

本文链接：https://blog.youkuaiyun.com/wowocpp/article/details/109494642

本文通过实例演示了QStringList的基本操作，包括添加元素、拼接字符串列表及使用迭代器遍历等。同时展示了如何利用QStringList的join和split方法进行字符串处理。

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在这里插入图片描述

删除 main.cpp
然后添加现有文件lists-examples.cpp
到工程
内容如下:

#include <QStringList>
#include <QDebug>

/* Some simple examples using QStringList, split and join */

int main() {

    QString winter = "December, January, February";
    QString spring = "March, April, May";
    QString summer = "June, July, August";
    QString fall = "September, October, November";

    QStringList list;
    list << winter;        /* Append operator 1. */
    list += spring;        /* Append operator 2. */
    list.append(summer);   /* append member function. */
    list << fall;

    qDebug() << "The Spring months are: " << list[1] ;


    QString allmonths = list.join(", ");            /* From list to string - join with a ", " delimiter. */
    qDebug() << allmonths;

    QStringList list2 = allmonths.split(", ");      /* Split is the opposite of join. Each month will have its own element. */

    Q_ASSERT(list2.size() == 12);                   /* Q_ASSERTions abort the program
        if the condition is not satisfied. */

    foreach (const QString &str, list) {            /* Qt foreach loop - similar
      to Perl/Python and Java 1.5  style for loops. */
        qDebug() << QString(" [%1] ").arg(str);
    }

    for (QStringList::iterator it = list.begin();
         it != list.end(); ++it) {          /* C++ STL-style iteration. */
        QString current = *it;              /* Pointer-style dereference. */
        qDebug() << "[[" << current << "]]";
    }

    QListIterator<QString> itr (list2);     /* Java 1.2 style Iterator. */
    while (itr.hasNext()) {                 /* Java Iterators point between elements. */
        QString current = itr.next();
        qDebug() << "{" <<  current << "}";
    }
    return 0;
}