Qt for Mac點擊dock事件處理

        在Mac osx的dock中單擊我們自己的程序圖標時，如何來實現顯示界面或者其他的操作呢？

        首先包含頭文件objc.h跟message.h，然後定義兩個函數setupDockClickHandler(安裝Dock點擊處理程序) 以及 dockClickHandler(接收dock點擊處理)

        

#ifdef Q_OS_MAC
#include <objc/objc.h>
#include <objc/message.h>
void setupDockClickHandler();
bool dockClickHandler(id self,SEL _cmd,...);

#endif

        實現部分的代碼

#ifdef Q_OS_MAC

void setupDockClickHandler() {
    Class cls = objc_getClass("NSApplication");
    objc_object *appInst = objc_msgSend((objc_object*)cls, sel_registerName("sharedApplication"));

    if(appInst != NULL) {
        objc_object* delegate = objc_msgSend(appInst, sel_registerName("delegate"));
        Class delClass = (Class)objc_msgSend(delegate,  sel_registerName("class"));
        SEL shouldHandle = sel_registerName("applicationShouldHandleReopen:hasVisibleWindows:");
        if (class_getInstanceMethod(delClass, shouldHandle)) {
            if (class_replaceMethod(delClass, shouldHandle, (IMP)dockClickHandler, "B@:"))
                qDebug() << "Registered dock click handler (replaced original method)";
            else
                qWarning() << "Failed to replace method for dock click handler";
        }
        else {
            if (class_addMethod(delClass, shouldHandle, (IMP)dockClickHandler,"B@:"))
                qDebug() << "Registered dock click handler";
            else
                qWarning() << "Failed to register dock click handler";
        }
    }
}

bool dockClickHandler(id self,SEL _cmd,...) {
    Q_UNUSED(self);
    Q_UNUSED(_cmd);
    
    //顯示窗口
//    QWidget w;
//    w.show();

    //

    // Return NO (false) to suppress the default OS X actions
    return false;
}


#endif

         然後我們在main.cpp中

#ifdef Q_OS_MAC
    setupDockClickHandler();
#endif

          這樣就可以實現mac dock點擊事件了