iOS-apps
Learning iOS app engineering
Model-View-Controller
Model layer: holds the data
View layer: contains objects that are visible to the user
Controller layer: controls the view and model
Interface Builder
- document outline
- this contains the "scenes" or the "screens"
- canvas
- the buttons, labels, input boxes, etc. are called view objects.
Keyboard shortcuts
- Cmd + R starts the simulator.
Auto layout
This tool will guarantee that the app will look great on any screen size.
Constraints
- if there are mistakes the constraints will show orange or red color
Connections
- a connection lets one object know where the another object is in memory so they can communicate
- the two types of connections are an outlet and action
- an outlet is a reference to an object
- an action is a method that gets triggered by a button or some other view object like slider or picker
- The object is the target that triggers the method.
Model layer
- Constant is denoted using
let - Variable is denoted using
var