ios

Aufgaben UiView

Zeichnen/Anzeigen von Inhalten

Verwalten von layouts

Behandeln von events

Wie nennt man eine eingebettete view

Subview

Wie nennt man übergeordnete view

Superview

Views frame

Position und Größe der view im Koordinatensystem der superview

Views bounds (vs frame)

Eigenes Koordinatensystem

nil

Int?

UiTextfield vs UITextview

Eingabe (control) vs Anzeige (view)

Ui Image view

Scale to fill

Aspect fit

Aspect fill

Positioning constraints

Alignment

Spacing

Size

Relation

Constraint variation

Responsive

Guard

guard condition else{false kram} True kram

Tab bar controller

Unten Tab bar

Navigation controller

Hierarchie/ stack

Segue

Interner link zwischen view controller

CustomStringConvertible

var description: String { return “…“}

Equatable

Station func == (lhs: KLASSE, rhs: KLASSE) → Bool { return alles vgl}

Comparable

Station func < (lhs: KLASSE, rhs: KLASSE) → Bool {return lhs.ka < rhs.ka}

Codable

var jsonEncoder = JSONEncoder()

do{let jsonData = try jsonEncoder.encode(OBJECT)

print(String(data: jsonData, encoding: .utf8)!)} catch { print()}

View controller lifecycle

viewDidLoad()

viewWillAppear(_:)

viewDidAppear(_:)

viewWillDisappear(_:)

viewDidDisappear(_:)

Tableview inhalt

var content = cell.defaultContentConfiguration()

content.text = “inhalt”

content.secondaryText = “inhalt2”

cell.contentConfiguration=content

State binding

@State in ContentView

@Binding in unterview

Environment angeben

@State private var Name = typ()

IrgeineView().environment(name)

Objekt anlegen

Environment holen

@Environment(typ.self) private var name

User centered design

Iterative

Involve users

Focus on user needs

Design approaches

Generative analytical

Design principles

Contrast repetition alignment proximity

Evaluation app design

Cognitive walkthrough Heuristic evaluation

Interviews observation controlled exp

4 areas xcode

Navigator toolbar editor debug inspector

3 errors

Warning compiler runtime

Ternary operator

Largest = a > b ? a : b

Mutating func

Changes property of struct

Type cast

if let swim = workout as? Swim

Closures

Let name = {( param)→ TYP in Irwas }