What difficulties and obstacles have you encountered when using the technologies you chose in your projects?

When working with iOS technologies, I often encountered the following challenges:

• Memory management and leaks, especially when using closures and delegates.
• Asynchrony and multithreading: properly updating the UI from background threads.
• Compatibility with different iOS versions and devices.
• Working with Auto Layout: sometimes it's difficult to achieve the desired interface behavior on various screens.
• App Store restrictions and security requirements, for example, when working with network and user data.

To address these issues, I used profiling tools (Instruments), wrote unit tests, applied design patterns (MVVM, Coordinator), and kept up with SDK updates.