Qt QCompleter自动补全

1.QCompleter类可以在输入框输入字符时，进行提示可以匹配上的字符

例：为QLineEdit设置自动补全

    QStringList country;
    country<<"China"<<"Japan"<<"English"<<"Endian"<<"American"<<"Australia";
    QCompleter *completer = new QCompleter(country, this);
    completer->setCaseSensitivity(Qt::CaseInsensitive);
    ui->lineEdit->setCompleter(completer);

2.设置model，自动补全

例：补全文件路径

 

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

3.一些常用设置

设置匹配规则

completer->setFilterMode(Qt::MatchStartsWith);
//Qt::MatchStartsWith //default 开头匹配
//Qt::MatchContains // 内容匹配
//Qt::MatchEndsWith //结尾匹配

设置补全方式

completer->setCompletionMode(QCompleter::PopupCompletion);
//QCompleter::InlineCompletion
//QCompleter::UnfilteredPopupCompletion

设置显示的最大数目

completer->setMaxVisibleItems(5);