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  • QWebView 与Js 交互

    我本愚钝,在网上搜了一下没找到可以运行的栗子,遂在这记录一下吧。

    环境:win10 64位系统  qt 4.8.7 (mingw32) qtcreator(4.5.0)

    1. 建立一个 Widgets Application 项目,修改 *.pro 文件 ,增加  QT += core gui webkit

     1 #
     2 #-------------------------------------------------
     3 
     4 QT       += core gui webkit
     5 
     6 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
     7 
     8 TARGET = testweb
     9 TEMPLATE = app
    10 
    11 # The following define makes your compiler emit warnings if you use
    12 # any feature of Qt which has been marked as deprecated (the exact warnings
    13 # depend on your compiler). Please consult the documentation of the
    14 # deprecated API in order to know how to port your code away from it.
    15 DEFINES += QT_DEPRECATED_WARNINGS
    16 
    17 # You can also make your code fail to compile if you use deprecated APIs.
    18 # In order to do so, uncomment the following line.
    19 # You can also select to disable deprecated APIs only up to a certain version of Qt.
    20 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
    21 
    22 
    23 SOURCES += 
    24         main.cpp 
    25         mytestwindow.cpp
    26 
    27 HEADERS += 
    28         mytestwindow.h
    29 
    30 FORMS += 
    31         mytestwindow.ui

    在 mytestwindow.h 增加

    1 public slots:
    2     void loadFinished();
    3     void onCall(QString name);
    View Code

    附 mytestwindow.h 全部文件

     1 #ifndef MYTESTWINDOW_H
     2 #define MYTESTWINDOW_H
     3 
     4 #include <QMainWindow>
     5 
     6 namespace Ui {
     7 class MyTestWindow;
     8 }
     9 
    10 class MyTestWindow : public QMainWindow
    11 {
    12     Q_OBJECT
    13 
    14 public:
    15     explicit MyTestWindow(QWidget *parent = 0);
    16     ~MyTestWindow();
    17 
    18 public slots:
    19     void loadFinished();
    20     void onCall(QString name);
    21 
    22 private:
    23     Ui::MyTestWindow *ui;
    24 };
    25 
    26 #endif // MYTESTWINDOW_H
    View Code

    附  mytestwindow.cpp 全部文件

     1 #include "mytestwindow.h"
     2 #include "ui_mytestwindow.h"
     3 #include <QWebView>
     4 #include <QWebFrame>
     5 #include <QDebug>
     6 
     7 
     8 MyTestWindow::MyTestWindow(QWidget *parent) :
     9     QMainWindow(parent),
    10     ui(new Ui::MyTestWindow)
    11 {
    12     ui->setupUi(this);
    13 
    14     QWebView *view = new QWebView(this->centralWidget());
    15     view->load(QUrl::fromUserInput(QString("D:\Qt\projects\web\testweb\test.html")));
    16     connect(view, SIGNAL(loadFinished(bool)), this, SLOT(loadFinished()));
    17 
    18     view->page()->mainFrame()->addToJavaScriptWindowObject("mytestwin",this);
    19 }
    20 
    21 MyTestWindow::~MyTestWindow()
    22 {
    23     delete ui;
    24 }
    25 
    26 void MyTestWindow::loadFinished()
    27 {
    28     QVariant f1result = ((QWebView*)sender())->page()->mainFrame()->evaluateJavaScript("f1('test param ha ha ha ~~')");
    29     qDebug() << f1result.toString();
    30 }
    31 
    32 void MyTestWindow::onCall(QString name)
    33 {
    34     qDebug()<<name;
    35 }
    View Code

    附  test.html 文件

     1 <head>
     2     <script LANGUAGE="JavaScript">
     3         function f1 (s) 
     4         {
     5             alert (s) 
     6             window.mytestwin.onCall("test on call");  
     7             return "f1 result ha ha ha ~~"
     8         }
     9     </script>
    10 </head>
    11 <body>
    12     test html
    13 </body>
    View Code

    运行结果如下:

     2018-2-9 ps:

    问题1: 加载 https 具有ssl的网站异常。

    解决1:需要 mingw32optin 目录下libeay32.dll和ssleay32.dll (qt对应mingw32)  复制  到项目的debug/release 目录以下即可。

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  • 原文地址:https://www.cnblogs.com/bhfdz/p/8309426.html
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