更改uiswitch上的text
為要更改text的uiswitch建立ib連接：例如myswitch,在代碼中改變文字：
((uilabel *)[[[[[[self.myswitch subviews] lastobject] subviews] objectatindex:2] subviews] objectatindex:0]).text = @foo;
((uilabel *)[[[[[[self.myswitch subviews] lastobject] subviews] objectatindex:2] subviews] objectatindex:1]).text = @bar;