On Habré last month the article was published
Contest VK: Messenger for Android. How it was! , in which the author shared his thoughts about the competition and published a list of resources and articles that helped him in creating the application. Since recently I began to study development for iOS, I have accumulated a number of links that may be useful for beginners. Therefore, I will follow his example and do the same for my platform only. I hope they will be useful to someone and save some time.

Chapter 1. Start.
It all started with the fact that I, and a few guys chose to develop an application for Ipad as an educational project. During the search,
Apple's manual was found, in which the company described in detail the main points and features of development for its platforms.
Objective-C was chosen as the language. Initially, Objective-C caused a slight surprise, but after trying it, it came to taste:
Xcode also looked threatening. But these
video tutorials helped him to get used to and understand.
Chapter 2. Basics.
Chapter 3. Databases.
Chapter 4. Sound processing: get ready, it will be loud!
Chapter 5. Animation: make it beautiful.
Chapter 6. Networking
Chapter 7. Customization of elements.
Chapter 8. Testing: make a quality product.
Chapter 9. Localization: preparing to conquer the world.
Chapter 10. For designers.
Chapter 11. In-App Purchases: monetization, monetization, monetization!
Chapter 12. Miscellaneous.
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And separately worth mentioning: