Implement GetLabel and SetLabel

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22017 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/cocoa/button.mm

@@ -66,6 +66,16 @@ void wxButton::Cocoa_wxNSButtonAction(void)
     Command(event);
 }
 
+wxString wxButton::GetLabel() const
+{
+    return wxString([[GetNSButton() title] lossyCString]);
+}
+
+void wxButton::SetLabel(const wxString& label)
+{
+    [GetNSButton() setTitle:wxNSStringWithWxString(label)];
+}
+
 wxSize wxButtonBase::GetDefaultSize()
 {
     // FIXME: stub