Last call for Beginning iOS & Swift Live Bootcamp!

Last chance to sign-up for this 15-week beginner bootcamp, starting on April 29th.

Learn iOS & Swift and launch your mobile development journey!

<noscript />

kodeco.com uses JavaScript extensively to offer the best possible user experience. JavaScript is currently disabled in your browser, and so we are unable to display all of our wonderful content. Please enable JavaScript in your browser and refresh this page.

Your First iOS and UIKit App

...

Your First iOS and UIKit App

21. Challenge: How to Calculate the Difference

Show episodes

Episodes

Hide episodes

Your First iOS and UIKit App

48 episodes · 2 hrs, 46 mins

Basic Controls

Part 1: 10 Episodes · 43 minutes

Show episodes Hide episodes

01. Introduction 2:27
02. Challenge: Making a Programming To-Do List 4:04
03. Buttons and Actions 8:59
04. Alerts 5:30
05. Solving Problems 7:33
06. Challenge: Connecting Actions 2:30
07. How Does an App Work 2:40
08. Portrait vs. Landscape 3:40
09. Challenge: Basic Controls 5:26
10. Conclusion 0:29

Outlets

Part 2: 9 Episodes · 34 minutes

Show episodes Hide episodes

11. Introduction 0:55
12. Objects, Data and Methods 4:10
13. Strings 3:36
14. Variables 8:14
15. Challenge: Your First Bug 1:38
16. Connecting Outlets 5:21
17. Writing Methods 7:01
18. Challenge: Connecting Outlets 2:36
19. Conclusion 0:30

Coding Basics

Part 3: 11 Episodes · 20 minutes

Show episodes Hide episodes

20. Introduction 0:46
21. Challenge: How to Calculate the Difference 2:51
22. Calculating the Difference 2:40
23. Challenge: Calculating the Difference 1:42
24. Variables vs. Constants 2:51
25. Type Inference 1:32
26. Challenge: Showing the Score 1:33
27. Challenge: Tracking Rounds 2:12
28. Adding Polish 2:29
29. Challenge: Adding Polish 1:38
30. Conclusion 0:45

Coding Practice

Part 4: 7 Episodes · 21 minutes

Show episodes Hide episodes

31. Introduction 0:45
32. Challenge: Local vs. Instance Variables 3:12
33. Closures 4:43
34. Challenge: Starting Over 2:13
35. Adding Extra Screens 5:41
36. Challenge: Adding Extra Screens 4:19
37. Conclusion 0:23

Styling the App

Part 5: 11 Episodes · 46 minutes

Show episodes Hide episodes

38. Introduction 0:54
39. Styling with Images and Labels 4:50
40. Challenge: Styling with Labels 2:02
41. Styling with Buttons and Sliders 9:33
42. Challenge: Styling the About Screen 3:25
43. Web Views and Developer Documentation 8:57
44. Introduction to Auto Layout 5:57
45. Challenge: Introduction to Auto Layout 3:51
46. App Icon and Display Name 1:49
47. Running the App on your Device 3:47
48. Conclusion 1:05

Your First iOS and UIKit App

Jul 24 2018 · Swift 4, iOS 12, Xcode 10

Part 3: Coding Basics

21. Challenge: How to Calculate the Difference

Episode complete

Play next episode

About this episode

See if you can figure out an algorithm to calculate the positive difference between the target value and the slider value.

Instructors

Ray Wenderlich

Contributors

Ray Wenderlich

Instructor

Andrew Bristow

Editor

Christine Sweigart

Editor

Over 300 content creators. Join our team.

Leave a rating/review

Sign up/Sign in

With a free Kodeco account you can download source code, track your progress, bookmark, personalise your learner profile and more!

Create account

Already a member of Kodeco? Sign in

See forum comments

This content was released on Jul 24 2018. The official support period is 6-months from this date.

See if you can figure out an algorithm to calculate the positive difference between the target value and the slider value.

Cinema mode Mark complete

Sign up/Sign in

With a free Kodeco account you can download source code, track your progress, bookmark, personalise your learner profile and more!

Create account

Already a member of Kodeco? Sign in

Download course materials

Sign up/Sign in

With a free Kodeco account you can download source code, track your progress, bookmark, personalise your learner profile and more!

Create account

Already a member of Kodeco? Sign in

Previous episode: 20. Introduction Next episode: 22. Calculating the Difference

Last call for Beginning iOS & Swift Live Bootcamp!

Your First iOS and UIKit App

Part 3: Coding Basics

21. Challenge: How to Calculate the Difference

Episode complete

About this episode

Instructors

Contributors

Sign up/Sign in

Sign up/Sign in

Sign up/Sign in

All videos. All books. One low price.

All videos. All books.
One low price.