TAG: Qt QStringList

#include <QStringList>
#include <QDebug>
#include <cassert>

/* 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;    // QStringList重载了许多函数和操作符
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(", "); //将“，”加到QStringList
/* from list to string - join with a ", " delimiter */
qDebug() << allmonths;

QStringList list2 = allmonths.split(", ");  //按照“，”将QStringList分割成QString
/* split is the opposite of join. Each month will have its own element. */

assert(list2.size() == 12); /* assertions abort the program  此时list2有12个元素
if the condition is not satisfied. */
//下面是各种迭代风格
foreach (QString str, list) { /* Qt 4 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
inbetween elements. */
QString current = itr.next();
qDebug() << "{" << current << "}";
}

return 0;
}

补充：QString test_list;

test_list<<"abc"<<"def"; //test_list为{"abc","def"}

test_list[1]="bcd";//test_list为{"abc","bcd"}

(dl-lzx)

QStringList可以使用QList的所有方法，如：append(), prepend(), insert(), replace(), removeAll(), removeAt(), removeFirst(), removeLast(), and removeOne()。

示例：

[cpp]  view plain copy 
               
              
 #include <QStringList>  
 #include <QTextStream>  
   
   
 static QTextStream cout(stdout, QIODevice::WriteOnly);  
 int main(int argc, char *argv[])  
 {  
     QString str = "1,2,3,4,5,6,7,8,9";  
     QStringList strList;  
       
     strList = str.split(",");  
       
     cout << "String list item count: " << strList.size() << endl;  
   
     for(int i = 0; i < strList.size(); i++)  
         cout << i + 1 << ":" << strList[i] << endl;  
   
     QString str2;  
     str2 = strList.join(",");  
   
     cout << str2 << endl;  
       
     return 0;  
 }  

QStringList与QString互转

QStringList fonts;
fonts << "Arial" << "Helvetica" << "Times" << "Courier";
QString str = fonts.join(",");

QString str = "name1,path1;name2,path2;name3,path3";
QStringList list1 = str.split(";"); // 注意，如果str是空字符串，list1会增加一个空字符串到列表里，其size=1，我为此吃过苦头～
for(int i=0;i<list1.size();i++)
{
QStringList list2 = list1[i].split(tr(","));
}

QStringList类常用方法总结|QStringList 遍历

QT4中QStringList的迭代

QStringList与QString互转

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