一步步学Qt,第四天-Qt 建立MainWindow遇到的问题,也是常见GUI工具的问题

一步步学Qt,第四天-Qt 建立MainWindow遇到的问题,也是常见GUI工具的问题

今天写了一个MainWidow,但是遇到的问题,很有意思,先看效果吧:(期望的效果)

结果我的结果是:

也就是,资源文件没有加载.

就在此刻,我突然的冒出来,是不是因为图片格式的问题?我里面改了一个试了试,此时的结果是

也就是说和资源的文件格式有关系,再试试试其他的部分,运行结果:

正常了.在窗口中使用的资源在窗口中的呈现结果,和资源文件的文件格式有关系的.
之前使用的文件是ico文件,那么这个或许在那个时候是可以的,不过因为不稳定所以就不行了.
附上源代码:

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>namespace Ui {    class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();    void loadFile(QString filename);    int fileChanged();    void saveFile();private:    Ui::MainWindow *ui;    QString fileName;private slots:    void about();    void newFile();    void openFile();};#endif // MAINWINDOW_H

#include "mainwindow.h"#include "ui_mainwindow.h"#include <QMessageBox>#include <QFileDialog>#include <QTextStream>#include <QTextEdit>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);   setCentralWidget(ui->textEdit);    //action setting    ui->mainToolBar->addAction(ui->action_New);    ui->mainToolBar->addAction(ui->action_Open);    ui->mainToolBar->addAction(ui->action_Cut);    ui->mainToolBar->addAction(ui->action_About);    //slot setting    connect(ui->action_About,SIGNAL(triggered()),this,SLOT(about()));    connect(ui->action_New,SIGNAL(triggered()),this,SLOT(newFile()));    connect(ui->action_Open,SIGNAL(triggered()),this,SLOT(openFile()));}MainWindow::~MainWindow(){    delete ui;}void MainWindow::about(){    QMessageBox::about(this,tr("About this app"),tr("copyrigth by PowerLinux"));    return;}void MainWindow::newFile(){    int i = fileChanged();    if(i == 1){        int s = QMessageBox::question(this,tr("Asking"),tr("File is changed ,Save it?"),QMessageBox::Ok | QMessageBox::Cancel);        if(s == QMessageBox::Ok){            saveFile();        }        else{            ui->textEdit->setText("");        }    }    else{            MainWindow *newWin = new MainWindow;                newWin->show();    }}void MainWindow::openFile(){    int i = fileChanged();    if(i == 1){        int s = QMessageBox::question(this,tr("Asking"),tr("File is changed ,are you sure?"),QMessageBox::Ok | QMessageBox::Cancel);        if(s == QMessageBox::Ok){            fileName = QFileDialog::getOpenFileName(this);            if (!fileName.isEmpty()) {                loadFile(fileName);            }        }    }    else{        fileName = QFileDialog::getOpenFileName(this);        if (!fileName.isEmpty()) {            loadFile(fileName);        }    }}void MainWindow::loadFile(QString filename){    QFile file(filename);    if(file.open(QIODevice::ReadOnly | QIODevice::Text)){        QTextStream textStream(&file);        while(!textStream.atEnd()){            ui->textEdit->append(textStream.readLine());        }    }}int MainWindow::fileChanged(){    if(ui->textEdit->document()->isModified()){       return 1;    }    else{        return 0;    }}void MainWindow::saveFile()//! [44] //! [45]{    fileName = QFileDialog::getSaveFileName(this);    if (!fileName.isEmpty()){        QFile file(fileName);        if (!file.open(QFile::WriteOnly | QFile::Text)) {            QMessageBox::warning(this, tr("Application"),                                 tr("Cannot write file %1:\n%2.")                                 .arg(fileName)                                 .arg(file.errorString()));        }        else{            QTextStream out(&file);            out << ui->textEdit->toPlainText();        }    }}

<RCC>    <qresource prefix="/images">        <file>images/accessories-text-editor.png</file>        <file>images/help-browser.png</file>        <file>images/internet-mail.png</file>        <file>images/office-calendar.png</file>    </qresource></RCC>

#-------------------------------------------------## Project created by QtCreator 2011-08-27T13:54:14##-------------------------------------------------QT       += core guiTARGET = widgetTEMPLATE = appSOURCES += main.cpp\        mainwindow.cppHEADERS  += mainwindow.hFORMS    += mainwindow.uiRESOURCES += \    app.qrcOTHER_FILES += \    app.rcRC_FILE +=\    app.rc