使用ui-router（AngularJS）时，$ rootScope。$ on（“$ routeChangeSuccess”或$ rootScope。$ on（“$ stateChangeSuccess”）不起作用

I am using UI-router for nested views in my application but at the sametime I want to listen for events when the route changes. Before using UI-router routeChangeSuccess was firing just fine but after ui-router it does not fire. Documentation suggests to use viewContedLoaded or stateChangeSuccess to be used but even they dont get fired. I am pasting my code snippet. Any help would be appreciated.I am using UI-router for nested views in my app