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Your First iOS and UIKit App

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Your First iOS and UIKit App

21. Challenge: How to Calculate the Difference

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Your First iOS and UIKit App

48 episodes · 2 hrs, 46 mins

Basic Controls

Part 1: 10 Episodes · 43 minutes

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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

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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

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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

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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

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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

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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

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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.

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

Your First iOS and UIKit App

Part 3: Coding Basics

21. Challenge: How to Calculate the Difference

Episode complete

About this episode

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