问题描述

我这个有不理解的地方帮我讲讲好吗？

 #include ""mainwindow.h""#include ""ui_mainwindow.h""#include <QTextFrame>#include <QDebug>#include <QLineEdit>#include <QDialog>#include <QPushButton>#include <QVBoxLayout>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent)    ui(new Ui::MainWindow){    ui->setupUi(this);    QTextDocument *document=ui->textEdit->document();    QTextFrame *rootFrame=document->rootFrame();    QTextFrameFormat format;    format.setBackground(Qt::blue);    format.setBorderBrush(Qt::red);    format.setBorder(3);    rootFrame->setFrameFormat(format);    QTextFrameFormat frameFormat;    frameFormat.setBackground(Qt::lightGray);    frameFormat.setMargin(20);    frameFormat.setPadding(50);    frameFormat.setBorder(6);    frameFormat.setBorderStyle(QTextFrameFormat::BorderStyle_Dotted);    QTextCursor cursor=ui->textEdit->textCursor();    cursor.insertFrame(frameFormat);    QAction *action_textFrame=new QAction(tr(""框架"")this);    connect(action_textFrameSIGNAL(triggered())thisSLOT(showTextFrame()));    ui->mainToolBar->addAction(action_textFrame);    QAction *action_textBlock=new QAction(tr(""文本块"")this);    connect(action_textBlockSIGNAL(triggered())thisSLOT(showTextBlock()));    ui->mainToolBar->addAction(action_textBlock);    QAction *action_font=new QAction(tr(""字体"")this);    action_font->setCheckable(true);    connect(action_fontSIGNAL(toggled(bool))thisSLOT(setTextFont(bool)));    ui->mainToolBar->addAction(action_font);    QAction *action_textFind=new QAction(tr(""查找"")this);    connect(action_textFindSIGNAL(triggered())thisSLOT(textFind()));    ui->mainToolBar->addAction(action_textFind);}void MainWindow::showTextFrame(){    QTextDocument *document=ui->textEdit->document();    QTextFrame *frame=document->rootFrame();    QTextFrame::iterator it;    for(it=frame->begin();it.atEnd()==0;++it)    {        QTextFrame *childFrame=it.currentFrame();        QTextBlock childBlock=it.currentBlock();        if(childFrame)            qDebug()<<""frame"";        else if(childBlock.isValid())            qDebug()<<""block:""<<childBlock.text();    }}void MainWindow::showTextBlock(){    QTextDocument *document=ui->textEdit->document();    QTextBlock block=document->firstBlock();    qDebug()<<document->blockCount();    for(int i=0;i<document->blockCount();i++)    {        qDebug()        <<tr(""文本块%1文本块首行行号为:%2长度为:%3内容为:"").arg(i).arg(block.firstLineNumber()).arg(block.length())             <<block.text();        block=block.next();    }}void MainWindow::setTextFont(bool checked){    if(checked)    {        QTextCursor cursor=ui->textEdit->textCursor();        QTextBlockFormat blockFormat;        blockFormat.setAlignment(Qt::AlignCenter);        cursor.insertBlock(blockFormat);        QTextCharFormat charFormat;        charFormat.setBackground(Qt::lightGray);        charFormat.setForeground(Qt::blue);        charFormat.setFont(QFont(tr(""宋体"")12QFont::Boldtrue));        charFormat.setFontUnderline(true);        cursor.setCharFormat(charFormat);        cursor.insertText(tr(""测试字体""));    }}void MainWindow::textFind(){    QDialog *dlg=new QDialog(this);    lineEdit=new QLineEdit(dlg);    QPushButton *btn=new QPushButton(dlg);    btn->setText(tr(""查找下一个""));    connect(btnSIGNAL(clicked(bool))thisSLOT(findNext()));    QVBoxLayout *layout=new QVBoxLayout;    layout->addWidget(lineEdit);    layout->addWidget(btn);    dlg->setLayout(layout);    dlg->show();}void MainWindow::findNext(){    QString string=lineEdit->text();    bool isfind=ui->textEdit->find(stringQTextDocument::FindBackward);    if(isfind)    {        qDebug()<<tr(""行号:%1列号:%2"").arg(ui->textEdit->textCursor().blockNumber()).                  arg(ui->textEdit->textCursor().columnNumber());    }}MainWindow::~MainWindow(){    delete ui;}

解决方案

你不理解的地方，建议标志出来、并说明你的理解与问题。否则，别人给你全部注释代码，基本上是不可能的。

解决方案二：
是应用输出的顺序的问题吗

解决方案三：
看不懂，这到底怎么赚积分啊

解决方案四：

        建议先学c++