IOS build problem

i have make an app in ionic2 with angular2 app is working fine on android devices and browsers. but it is not working fine on IOS devices like sidebar menu toggle button is not showing and also images are not showing properly and also other css problems are occurring

Did you remote debug the problem on the device already? Follow these instructions here to debug the problem in Safari dev tools: Look at the console and network tabs for errors.

i debug on xcode there is no error in the code. only css is not working with IOS devices

Don’t do that, but do it how described in the linked instructions. Find out what is going wrong on iOS by doing that.