I'm a senior iOS app engineer from Toronto. I can provide mentoring for the following:
Programming and object oriented concepts
Objective C / Swift
XCode project setup and iOS Simulator
Testing and debugging
User interface design using Storyboard
Number / Date / String handling
Array, Dictionary, Sets, and other data structures
Model / View / Controller setup
Touch handling and button actions
Text input and validations
Pushing and popping screens
Alerts and Action sheets
Reading and writing data - local database (Core Data)
Reading and writing data - internet
Webservices / API integration
Image / Audio / Video integration
Responsive user interface using Auto layout
Displaying data in lists / tables / grid
Integration Location / GPS and Maps
Integration Bluetooth LE and iBeacons
Customizing user interface and animations
Integrating web pages using web views
Error handling and best practices of quality assurance
XCode and iOS simulators
Apple Developer account
iTunes Connect account
Configuring Distribution and Development Certificates, App IDs, and Provisioning profiles
Setting up Apple Push notifications