Create a comprehensive iOS development tutorial video that teaches how to build a complete app in just one hour. Learn essential skills for iPhone app creation, including setting up Xcode, designing the user interface with constraints and stack views, implementing dark and light modes, adding interactive components like sliders and steppers, handling user input, and more. Follow along step-by-step to create a functional tip calculator app while gaining knowledge applicable to various iOS projects. Perfect for beginners seeking a concise introduction to iOS development or experienced developers looking for a quick refresher.