This is a good lecture to learn the basic concepts and become familiar with Xcode. It also teaches you by looking at the official library documentation, so it seems like it would be good for you to find libraries on your own and develop them later.

hanbee

This is an Objective-C course. It is an efficient course that quickly learns the basic grammar and usage of Objective-C and then learns by using it as much as possible through various examples. Objective-C still accounts for more than 80% of iPhone apps.

appstamp70006

Objective-C Tutorial - Learn iOS iPhone App Development by Building 12 Apps

입문

초급

중급이상

오브젝티브-C

Objective-C

Orientation

Section 1. First Project & Objective - C Basic Grammar

Section 2. Book Manager

Section 3. Visual Book Manager

Section 4. Digital Photo Frame App

Section 5. Membership Registration Screen App

Section 6. App Life Cycle

Section 7. Creating a Mini Web Browser

Section 8. Creating a Flight Ticket Search Screen UI App

Section 9. Creating an I want a super car app

Section 10. Tabbar Example (Multi ViewControler)

Section 11. Creating a Weather App (UITableView)

Section 12. Customizing the Table View (Custom Cell)

Section 13. Creating a Constellation Description App

Section 14. Creating a Weather App (XML Parsing)

Section 15. Creating a Weather App (JSON Parsing)

Section 16. Image Download App - Asynchronous Communication (Delegate)

Section 17. Image Download App - Asynchronous Communication (Block Coding)