QT + common controls _Line Edit

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QDebug>
#include <QCompleter>
#include <QStringList>
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    Despite -> setupUi ( this );


    // function content is acquired QLineEdit text (), a function of the content is provided the setText (), 
    QString STR = ui-> lineEdit-> text ();
    qDebug()<<str;

    ui->lineEdit->setText("1111111");

    // set contents gap 
    ui-> lineEdit-> setTextMargins ( 15 , 0 , 0 , 0 ); // which is a unit of pixels

    // display the contents of the way
 //     ui-> lineEdit-> setEchoMode (QLineEdit :: Password);

    QStringList list;
    list<<"hello"<<"How are you "<<"hehe";
    QCompleter * COM = new new QCompleter (List, the this ); // When you enter some text, enables smart tips 

    COM -> setCaseSensitivity (Qt :: CASEINSENSITIVE); // content identification of the input box is not case sensitive 

    ui - > lineEdit-> setCompleter (COM);

}

MainWindow :: ~ MainWindow ()
{
    delete ui;
}

Function: display the password, Lenovo intelligent input prompts based on content. You can read and write to the contents inside