pagemenu, is used in the project, but cannot set which page to display after entry. It can only be moved to the specific page via moveToPage
_ pageMenu = [[CAPSPageMenu alloc] initWithViewControllers:controllerArray

                                                    frame:CGRectMake(0.0, 64.0, self.view.frame.size.width, self.view.frame.size.height)
                                                  options:parameters];
_pageMenu.delegate = self;
_pageMenu.currentPageIndex = 0;
_pageMenu.controllerScrollView.scrollEnabled = YES;

[_pageMenu moveToPage:_currentIndex];

_pageMenu.tap = ^(NSInteger index){
    
};

/ / set _ pageMenu.currentPageIndex = 0; invalid