Mobile App Development 2021W Lecture 4 - Revision history

Soma at 21:08, 20 January 2021

2021-01-20T21:08:09Z

← Older revision		Revision as of 21:08, 20 January 2021
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	- only use SwiftUI components in Views, not elsewhere		- only use SwiftUI components in Views, not elsewhere
	</pre>		</pre>

			==Code==

			[https://homeostasis.scs.carleton.ca/~soma/mad-2021w/code/tut01-test.zip tut01-test.zip]

			===tut01-test/Shared/ContentView.swift===
			<syntaxhighlight lang="swift" line>
			//
			// ContentView.swift
			// Shared
			//
			// Created by Anil Somayaji on 2021-01-19.
			//

			import SwiftUI

			struct ContentView: View {
			@State private var Fs = ""

			var body: some View {
			VStack{
			Text("Temperature Converter")
			.font(.title)
			.fontWeight(.bold)
			.padding()

			Spacer()
			TextField("Enter Farenheit", text: $Fs)
			SubView(Fs: $Fs)
			Spacer()
			}
			}
			}

			struct SubView: View {
			@Binding var Fs: String
			var body: some View {
			if let F = Double(Fs) {
			let C = (F - 32.0) * (5/9)
			let Cs = String(format: "%0.2f", C)

			Text("\(Fs) is \(Cs) Celsius")

			let K = C + 273.15
			let Ks = String(format: "%0.2f", K)
			Text("\(Fs) is \(Ks) Kelvin")
			} else {
			Text("Enter a number please.")
			}
			}
			}

			struct ContentView_Previews: PreviewProvider {
			static var previews: some View {
			ContentView()
			}
			}
			</syntaxhighlight>

Soma: /* Notes */

2021-01-20T21:00:15Z

Notes

← Older revision		Revision as of 21:00, 20 January 2021
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	==Notes==		==Notes==

			Historical articles referenced in class:
			* [https://www.dougengelbart.org/content/view/209/448/ The Mother of All Demos]
			* [https://en.wikipedia.org/wiki/Xerox_Alto Xerox Alto]
			* [https://en.wikipedia.org/wiki/Apple_Lisa Apple Lisa]
			* [https://en.wikipedia.org/wiki/ResEdit ResEdit]
			* [http://www.kevra.org/TheBestOfNext/page570/page571/page571.html NeXT development tools]


	<pre>		<pre>

Soma at 20:52, 20 January 2021

2021-01-20T20:52:04Z

← Older revision		Revision as of 20:52, 20 January 2021
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	Video from the lecture given on January 20, 2021 [https://homeostasis.scs.carleton.ca/~soma/mad-2021w/lectures/comp1601-2021w-lec04-20210120.m4v is now available].		Video from the lecture given on January 20, 2021 [https://homeostasis.scs.carleton.ca/~soma/mad-2021w/lectures/comp1601-2021w-lec04-20210120.m4v is now available].

			==Notes==

			<pre>
			Lecture 4
			------------

			* nested views
			* UIkit
			* Apple-centered history of GUIs
			- mother of all demos (Englebart, 1968)
			- Xerox Alto
			- Lisa
			- Macintosh
			- NeXT
			- MacOS X
			- iPhone


			Why not just use HTML/CSS everywhere, instead of SwiftUI?
			- because then you need an entire web renderer to create the interface!
			- web rendering engines are BEASTS
			- only 3 left
			Webkit (Apple)
			Blink (Google, fork of Webkit)
			Gecko (Mozilla)

			Microsoft had Trident, but they gave up and adopted Blink for Edge

			UIkit is for iOS, AppKit is for MacOS
			- storyboard is the way you make these interfaces

			SwiftUI is for both MacOS and iOS


			SwiftUI is really a domain-specific language for building interfaces,
			built using Swift
			- some rules of regular swift apply, but many don't
			- really need to switch modes when doing SwiftUI
			- only use SwiftUI components in Views, not elsewhere
			</pre>

Soma: Created page with "==Video== Video from the lecture given on January 20, 2021 [https://homeostasis.scs.carleton.ca/~soma/mad-2021w/lectures/comp1601-2021w-lec04-20210120.m4v is now available]."

2021-01-20T20:49:59Z

Created page with "==Video== Video from the lecture given on January 20, 2021 [https://homeostasis.scs.carleton.ca/~soma/mad-2021w/lectures/comp1601-2021w-lec04-20210120.m4v is now available]."

New page

==Video==

Video from the lecture given on January 20, 2021 [https://homeostasis.scs.carleton.ca/~soma/mad-2021w/lectures/comp1601-2021w-lec04-20210120.m4v is now available].