-(PRAboutWindowController*)aboutCtrl{
if(_aboutCtrl == nil){
_aboutCtrl = [[PRAboutWindowController alloc]initWithWindowNibName:@"PRAboutWindowController"];
}
return _aboutCtrl ;
}
-(PRAboutWindowController*)aboutCtrl{
if(_aboutCtrl == nil){
_aboutCtrl = [[PRAboutWindowController alloc]initWithWindowNibName:@"PRAboutWindowController"];
}
return _aboutCtrl ;
}