Swift from scratch - learn programming on iOS

Explore declaring variables with var and constants with let in Swift, learn basic data types (strings, characters, int, float, double, bool, nil), type inference, and safe constant usage.

Learn how to declare and use character variables and strings, concatenate with the plus operator, iterate with for-in loops, and format strings using path components and string methods in Swift.

Explore arrays and dictionaries in Swift, reading and updating elements by index, expanding collections, and handling optional values with nil checks and force unwrapping.

Explore Swift loops, comparing while and for loops, with examples like calculating factorials, iterating over strings, and browsing dictionaries; learn loop control, counters, and collection traversal.

Explore conditional statements in Swift, using if, else if, and switch cases to branch code based on conditions, with exhaustive switches and no need for break statements.

Learn how swift functions are declared with func, accept parameters, and return values using an arrow. Practice calling functions, using default parameter values, and returning multiple values.

Master swift closures as unnamed functions, assign them to variables, and pass them as arguments. Learn with map, a square function, and simple diagram drawing to visualize closures in Swift.

Learn to define Swift classes with properties, methods, and initializers, and apply inheritance via base and subclass examples. Explore computed properties, self, overrides, and willSet/didSet in a car scenario.

Explore structures as grouped variables with points and rectangles, including initialization, computed properties like width and height, area methods, and their by-value semantics versus class reference.

Explore enumerated types in Swift with raw values, dot notation to define and read seasons. Learn generics by using a type parameter T to swap values and write reusable code.

Explore how extensions in Swift enhance types with new functions, including the mutating keyword that allows a function to modify values, demonstrated on a rectangle with width and height.

Build a tip calculator app in Xcode with Swift by creating a single-view project, designing the interface with text fields, labels, and a button, and configuring icons.

Create a Swift tip calculator model with six double variables and an init plus a calculated function to compute tip, total, and per-person amounts, then link to the view controller.

this lecture demonstrates building a tip calculator in ios by linking outlets and actions between storyboard elements and the view controller, initializing the model, and implementing automatic calculations.