相关疑难解决方法(0)

我在a上使用setView:方法NSMenuItem来设置自定义视图.在此自定义视图中,有一个图像占据整个视图.在NSMenuItem这个自定义视图是在菜单的第一个,但问题是,它不坐与菜单的顶部齐平,有很大的差距,你可以在这里看到:

为什么会这样,我怎么能阻止它呢？

编辑

我现在正在使用此代码,但我正在EXC_BAD_ACCESS上线InstallControlEventHandler.

-(void)applicationDidFinishLaunching:(NSNotification *)aNotification {
    HIViewRef contentView;
    MenuRef menuRef = [statusMenu carbonMenuRef];

    HIMenuGetContentView(menuRef, kThemeMenuTypePullDown, &contentView);

    EventTypeSpec hsEventSpec[1] = {
        { kEventClassMenu, kEventMenuCreateFrameView }
    };

    InstallControlEventHandler(contentView,
                           NewEventHandlerUPP((EventHandlerProcPtr)hsMenuCreationEventHandler),
                           GetEventTypeCount(hsEventSpec),
                           hsEventSpec,
                           NULL,
                           NULL); // Get EXC_BAD_ACCESS here.
}

static OSStatus hsMenuContentEventHandler( EventHandlerCallRef caller, EventRef event, void* refcon )
{
    OSStatus  err;

    check( GetEventClass( event ) == kEventClassControl );
    check( GetEventKind( event ) == kEventControlGetFrameMetrics );

    err = CallNextEventHandler( caller, event ); …