The Ultimate iOS 11 & Swift 4 Course. Learn to Build Apps!

Explore swift conditional operators - comparison, logical, and nil coalescing - to test conditions, booleans, and control flow with if statements and loops, equals, and triple equals.

Learn how to work with Swift collection types, declare and initialize arrays, and compare arrays, sets, and dictionaries with tuples, including strings as collections.

Learn two ways to create an empty array in Swift and how to initialize an array with a repeated value, such as five zeros, while enforcing the element type.

Explore the fundamentals of control flow, including if and switch statements, nil value testing, and loops, with guidance on when to use each construct and how to prevent crashes.

Learn to test for nil values in Swift 4 by using three approaches—nil comparison, if let, and guard let—while avoiding force unwraps and leveraging the nil-coalescing operator and other control flows.

Explore loops, including while loops, repeat-while variants, and for-each loops, and learn to set start and end conditions, define loop bodies, and prevent infinite loops.

Learn the fundamentals of functions in swift, including declaring a function name, parameters, return type, and body, calling functions, and using helper and listener-style calls for event-driven behavior.

Explore how functions return values with return statements and return types, treat calls as expressions, and use or ignore the result, with examples like max of an array and addition.

Explore how structs compare to classes, focusing on initializers, properties, methods, value types, and mutating functions to manage inventory items.

Learn how the view controller and the main storyboard anchor an iOS app, from the launch screen to the interface loaded by the view controller and its viewDidLoad setup.

Explore the main storyboard in Xcode, learn how a single view controller and UI elements use constraints, inspectors, and outlets to connect to code and build an iOS app.

Connect outlets and actions to the view controller to access UI elements from code, wire the button's touch up inside event, and update the label text on press.

Use Xcode's debugger with breakpoints to pause and inspect variables, then step through code to identify issues. Rely less on print statements and fix bugs faster in larger apps.

Build a basic calculator app in Xcode using Swift, performing add, subtract, multiply, and divide with numeric and decimal inputs, displaying results and connecting outlets and actions.

Connect outlets for red, green, blue, and alpha text fields and the convert button, then wire actions for segment changes and the conversion to display hex and RGB values.

Learn to implement hex to rgb conversion in a Swift iOS app, parsing hex strings to 8-bit values, handling alpha, and applying the resulting color.