QT QLineEdit显示模式掩码输入验证自动补全示范

QT QLineEdit显示模式掩码示范

输入掩码

 

输入验证--参考构造函数代码

自动补全功能介绍 --参考构造函数代码

#include "mainwindow3_10.h"
#include "ui_mainwindow3_10.h"
#include 
#include 
#include 
 
MainWindow3_10::MainWindow3_10(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::MainWindow3_10)
{
    ui->setupUi(this);
 
 
 
      //QString styleSheet=QString("QLineEdit[echoMode=\"2\"]{ lineedit-password-character: 42 }");//*号显示*
     // QString styleSheet=QString("QLineEdit[echoMode=\"2\"]{ lineedit-password-character: 9835 }");//音乐符号显示♫
      QString styleSheet=QString("QLineEdit[echoMode=\"2\"]{ lineedit-password-character: 9733 }");//实心五角星符号显示★
 
      //-------------------------------------
      //https://bbs.csdn.net/topics/392513644?page=1#post-414289855
      // https://doc.qt.io/archives/qt-4.8/stylesheet-examples.html
      //字符百科查询字符显示对应的HTML代码编号,五角星就是9733,https://unicode-table.com/cn/
 
      //-------------------------------------
 
            ui->lineEdit_1->setStyleSheet(styleSheet);
            //验证器，指定范围100-500之间的数
            QValidator *validator2=new QIntValidator(100,500,this);
            ui->lineEdit_3->setValidator(validator2);
            //或者用正则表达式来做限制
           // QRegExp rx2("-?\\d{1,3}");//输入带符号数字，至少1位，最多3位
         //   QValidator *validator3=new QRegExpValidator(rx2,this);
           // ui->lineEdit_3->setValidator(validator3);
 
            //自动补全
            QStringList wordList2;
            wordList2<<"Qt1"<<"Qt2"<<"Qt6"<<tr("很好");
            QCompleter *completer2 = new QCompleter(wordList2,this);
             completer2->setCaseSensitivity(Qt::CaseInsensitive);
             ui->lineEdit_4->setCompleter(completer2);
}
 
 
MainWindow3_10::~MainWindow3_10()
{
    delete ui;
}
 
 
void MainWindow3_10::on_lineEdit_2_returnPressed()//按下回车后执行的操作
{
  //  ui->lineEdit_3->setFocus();
  //  qDebug()<lineEdit_2->text();
   // qDebug()<lineEdit_2->displayText();
 
}
 
void MainWindow3_10::on_lineEdit_3_returnPressed()
{
    qDebug()<<"lineEdit3 pressed return:"<lineEdit_3->text();
}