Windows下Qt Creator中使用cef（移植cefsimple到qt程序例子）

上篇文章，通过CMake+VS2017成功编译了libcef_dll_wrapper.lib静态库，默认使用的是MTd的链接方式，而Qt中常使用的是动态链接（即MDd），所以需要使用MDd的方式重新编译libcef_dll_wrapper.lib。
环境：Windows10 x64 + Qt5.12.3 + VS2017 + cef_binary_3.2704.1414.g185cd6c_windows64

Qt Creator中新建基于Widget的应用程序QtWidgetCef，使用构建组件MSVC2017 64bit。

为了快速实现，我们将cefsimple demo中的源码直接移植到QtWidgetCef中。
首先把cef目录下的include拷贝到新项目中，再将libcef_dll_wrapper.lib（静态库）以及libcef.lib（动态库导入库）拷贝到新项目的lib目录下，然后在pro文件中配置include和lib目录并链接静态库。最后将cefsimple中的simple_app.h、simple_app.cc、simple_handler.h、simple_handler.cc、simple_handler_win.cc拷贝到QtWidgetCef工程源码目录下并在项目中添加。

#-------------------------------------------------
#
# Project created by QtCreator 2020-01-07T14:44:06
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = MyqtCEF
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

CONFIG += c++11

SOURCES += 
        main.cpp 
        simple_app.cc 
        simple_handler.cc 
        simple_handler_win.cc 
        widget.cpp

HEADERS += 
        simple_app.h 
        simple_handler.h 
        widget.h

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

win32: LIBS += -L$$PWD/lib/ -llibcef_dll_wrapper
win32: LIBS += -L&&PWD/lib/ -llibcef

INCLUDEPATH += $$PWD/include
DEPENDPATH += $$PWD/include

win32:!win32-g++: PRE_TARGETDEPS += $$PWD/lib/libcef_dll_wrapper.lib
else:win32-g++: PRE_TARGETDEPS += $$PWD/lib/liblibcef_dll_wrapper.a

LIBS += $$PWD/lib/libcef_dll_wrapper.lib 
shell32.lib 
kernel32.lib 
user32.lib 
ole32.lib 
oleaut32.lib 
gdi32.lib

将代码中的#include "cefsimple/simple_handler.h"替换为#include "simple_handler.h"，因为路径改变了~  打开main.cpp，将主函数改为如下代码：

int main(int argc, char* argv[]) {
    // Enable High DPI support.
    CefEnableHighDPISupport();

    // Structure for passing command-line arguments.
    // The definition of this structure is platform-specific.
    CefMainArgs main_args(GetModuleHandle(nullptr));

    // Optional implementation of the CefApp interface.
    CefRefPtr<CefApp> app(new SimpleApp);

    // Execute the sub-process logic, if any. This will either return immediately for the browser
    // process or block until the sub-process should exit.
    int exit_code = CefExecuteProcess(main_args, app.get(), nullptr);
    if (exit_code >= 0) {
        // The sub-process terminated, exit now.
        return exit_code;
    }

    // Populate this structure to customize CEF behavior.
    CefSettings settings;
    settings.no_sandbox = true;

    // Multi-thread message loop?
    settings.multi_threaded_message_loop = false;

    // Initialize CEF in the main process.
    CefInitialize(main_args, settings, app.get(), nullptr);

    // Run the CEF message loop. This will block until CefQuitMessageLoop() is called.
    CefRunMessageLoop();

    // Shut down CEF.
    CefShutdown();

    return 0;
}

其中，打开网址改为百度：www.baidu.com

 构建运行：

 注意：需要将cefsimple demo运行目录下的文件拷贝过来，除了cefsimple外，其余全部拷贝在QtWidgetCef的生成目录下，此外还要包含必须的Qt dll

如果出现链接错误：libcef_dll_wrapper.lib(browser_view_delegate_cpptoc.obj):-1: error: LNK2001: 无法解析的外部符号 __imp_cef_string_utf16_set等，那是因为没有链接libcef.lib。

 测试代码分享：链接: https://pan.baidu.com/s/1G9vzHn8KdcClI55R31gQVA 提取码: nwc5