QT5。 QMacNativeWidget。架构x86_64的未定义符号

时间:2013-02-11 17:17:22

标签: cocoa qt

Qt5文档中列出了

QMacNativeWidget ,但是使用嵌入式Qt Widgets创建Cocoa应用程序的任何尝试都会给我下一个错误:

Undefined symbols for architecture x86_64:
  "QMacNativeWidget::QMacNativeWidget(void*)", referenced from:
      -[AppDelegate loadUi] in AppDelegate.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

这是我的代码:

@interface AppDelegate : NSObject <NSApplicationDelegate>
{
    std::auto_ptr<QWidget> nativeWidget;
    ...
}
// Qt Widget will be attached to this view
@property (weak) IBOutlet NSView *view; 
@end

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
    [self initQtIfNeeded];
    [self loadUi];
}

-(void) initQtIfNeeded
{
    QApplication* app = qApp;
    if (app == 0)
    {
        puts("Creating new QApplication instance...");
        QApplication::setDesktopSettingsAware(true);
        QApplication::setAttribute(Qt::AA_MacPluginApplication, true);
        int argc = 0;
        app = new QApplication(argc, NULL);
        ...
    }
}

-(void)loadUi
{
    nativeWidget.reset(new QMacNativeWidget());
    ...

    // Casting pointer (x86_64 with ARC)
    void* winId = reinterpret_cast<void *>(nativeWidget->winId());
    NSView *nativeWidgetNSView = (__bridge NSView*)winId;

    // Attaching Qt Widget to NSView
    [self.view addSubview:nativeWidgetNSView positioned:NSWindowAbove relativeTo:nil];
    nativeWidget->setGeometry(0, 0, self.view.frame.size.width, self.view.frame.size.height);

    ...

    nativeWidget->show();
}

当我使用QWidget而不是QMacNativeWidget(即:nativeWidget.reset(new QWidget());)时,应用程序会成功链接,但在运行时会创建其他窗口。(

Screenshot

我的问题:我做错了什么或是Qt问题? 谢谢!

1 个答案:

答案 0 :(得分:0)

这里的问题相同。我解决了将文件扩展名从“.cpp”更改为“.mm”的问题。我在一些QtBug描述中看到了这个技巧,尝试并为我工作(使用静态构建的Qt 5.7)。 .mm扩展用于Objective-C ++代码,Objective-C和C ++的混合。使用.cpp扩展名我有“Undefined Symbols”错误。