iOS 7 has a well known but where showing a modal view while the status bar is in prompt mode (double height status bar, e.g. when user is in a call) the view would have a wrong position.
Using some cute swizzling this pod can fix it.
[UINavigationController applyiOS7ModalFix_NavigationController];
[UIViewController applyiOS7ModalFix_ViewController];
[UIView applyiOS7ModalFix_View];
Since iOS 8 fixed it and not a lot of iOS 7 devices are still around this pod has been deprecated.
Read the code, share it, update it, fork it, it's all yours now.
Please do not open an issue.