Hi I am just new to the qt programming, what I did is just the tut of qt textfinder. Now it can be compiled, however there is no text showed in the textedit part, does anybody know what mistakes I make?
Here is the code:
Qt Code: 
  1. #include "textfinder.h"
  2. #include "ui_textfinder.h"
  3. #include <QFile>
  4. #include <QTextStream>
  5. #include <QWidget>
  6.  
  7. textfinder::textfinder(QWidget *parent) :
  8.     QWidget(parent),
  9.     ui(new Ui::textfinder)
  10. {
  11.     ui->setupUi(this);
  12.     loadTextFile();
  13.     //QMetaObject::connectSlotsByName(this);
  14. }
  15.  
  16. textfinder::~textfinder()
  17. {
  18.     delete ui;
  19. }
  20.  
  21. void textfinder::loadTextFile()
  22. {
  23.     QFile inputFile(":/input.txt");
  24.     inputFile.open(QIODevice::ReadOnly);
  25.  
  26.     QTextStream in(&inputFile);
  27.     QString line = in.readAll();
  28.     inputFile.close();
  29.  
  30.     ui->textEdit->setPlainText(line);
  31.     QTextCursor cursor = ui->textEdit->textCursor();
  32.     cursor.movePosition(QTextCursor::Start, QTextCursor::MoveAnchor, 1);
  33. }
  34.  
  35. void textfinder::on_findButton_clicked()
  36. {
  37.     QString searchString = ui->lineEdit->text();
  38.     ui->textEdit->find(searchString, QTextDocument::FindWholeWords);
  39. }
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