QCompleter類提供了模型item的提示功能。

QCompleter可以再Qt的任意控件進行提示，如QLineEdit和QComboBox控件。當用戶開始輸入一個單詞是，QCompleter會進行提示。

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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的另外一個例子：

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

下面是對QCompleter的數據進行遍歷

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

下面是個小例子：

程序運行截圖如下：

及

關鍵代碼：

#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; }

源碼打包下載地址：

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

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