Qt文档阅读笔记-QCompleter官方解析及实例

QCompleter类提供了模型item的提示功能。

QCompleter可以再Qt的任意控件进行提示，如QLineEdit和QComboBox控件。当用户开始输入一个单词是，QCompleter会进行提示。

 

下面是QCompleter的基本用法：

QStringList wordList; wordList << "alpha" << "omega" << "omicron" << "zeta"; QLineEdit *lineEdit = new QLineEdit(this); QCompleter *completer = new QCompleter(wordList, this); completer->setCaseSensitivity(Qt::CaseInsensitive); lineEdit->setCompleter(completer);

下面是使用QFileSystemModel的另外一个例子：

QCompleter *completer = new QCompleter(this); completer->setModel(new QDirModel(completer)); lineEdit->setCompleter(completer);

下面是对QCompleter的数据进行遍历

for(int i = 0; completer->setCurrentRow(i); i++) qDebug() << completer->currentCompletion() << " is match number " << i;

下面是个小例子：

程序运行截图如下：

及

关键代码：

#include "widget.h" #include "ui_widget.h" #include <QCompleter> #include <QDirModel> #include <QDebug> Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); QStringList wordList; wordList << "alpha" << "omega" << "omicron" << "zeta" << "中文" << "中文中文中文中文"; QCompleter *completer1 = new QCompleter(wordList, this); completer1->setCaseSensitivity(Qt::CaseInsensitive); ui->lineEdit->setCompleter(completer1); QCompleter *completer2 = new QCompleter(this); completer2->setModel(new QDirModel(completer2)); ui->lineEdit_2->setCompleter(completer2); for(int i = 0; completer1->setCurrentRow(i); i++){ qDebug() << completer1->currentCompletion() << " is match number " << i; } } Widget::~Widget() { delete ui; }

源码打包下载地址：

https://github.com/fengfanchen/Qt/tree/master/CompleterDemo