Discover tips, shortcuts, and tricks that will make you a more efficient iOS developer

1. T H E X C O D E S U R V I VA L G U I D E
K R I S T I N A F O X , S E N I O R I O S E N G I N E E R , I N T U I T

2. kristina.io @krstnfx
🛌

3. kristina.io @krstnfx
🖥

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💦
👟

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✨

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🏃

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8. P E T E ’ S V E RY S T R A N G E D AY
'

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🖥

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C O L O R A S S E T S

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L O C K S T O RY B O A R D E L E M E N T S
Lock -> All Properties

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🚨 20:00 🚨

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M U LT I P L E A S S I S TA N T E D I T O R S

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A S S I S TA N T E D I T O R V I E W M O D E
All Editors Stacked Horizontally

21. kristina.io @krstnfx
S E L E C T F I L E V I E W L O C AT I O N
Alt-shift-click

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C H A N G E C O M M A N D - C L I C K O P T I O N

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Q U I C K O P E N F U N C T I O N L I S T
Ctrl-6

26. kristina.io @krstnfx
S E A R C H F U N C T I O N S I G N AT U R E S
Ctrl-6
Just start typing

27. kristina.io @krstnfx
//
// DryExecutionHandler.swift
// Resin
//
import Foundation
class DryExecutionHandler: NSObject {
override init() {
let network = Network()
network.executeDrying()
}
}
//
// RinseExecutionHandler.swift
// Resin
//
import Foundation
class RinseExecutionHandler: NSObject {
override init() {
let network = Network()
network.executeRinsing()
}
}
//
// StickExecutionHandler.swift
// Resin
//
//
import Foundation
class StickExecutionHandler: NSObject {
override init() {
let network = Network()
network.executeStickiness()
}
}

28. kristina.io @krstnfx
//
// Network.swift
// Resin
//
import Foundation
class Network: NSObject {
func executeDrying() {
let url = "resin-prod.com/dry"
executeAction(url: url)
}
func executeStickiness() {
let url = "resin-prod.com/sticky"
executeAction(url: url)
}
func executeRinsing() {
let url = "resin-dev.com/rinse"
executeAction(url: url)
}
}

29. kristina.io @krstnfx
//
// Network.swift
// Resin
//
import Foundation
class Network: NSObject {
func executeDrying() {
let url = "resin-prod.com/dry"
executeAction(url: url)
}
func executeStickiness() {
let url = "resin-prod.com/sticky"
executeAction(url: url)
}
func executeRinsing() {
let url = "resin-dev.com/rinse"
executeAction(url: url)
}
}

30. kristina.io @krstnfx
//
// Network.swift
// Resin
//
import Foundation
class Network: NSObject {
func executeDrying() {
let url = "resin-prod.com/dry"
executeAction(url: url)
}
func executeStickiness() {
let url = "resin-prod.com/sticky"
executeAction(url: url)
}
func executeRinsing() {
let url = "resin-dev.com/rinse"
executeAction(url: url)
}
}

31. kristina.io @krstnfx
U S E R D E F I N E D B U I L D S E T T I N G S
Project file -> Build Settings -> User-Defined Settings
02:49

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✅
First stage
complete

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🚪

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🧖
🎭

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🖥

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D E V I C E C R A S H L O G S
1. Windows -> Devices and Simulators
2. Choose Devices tab
3. View device logs

40. kristina.io @krstnfx
“ C AT C H A L L ” B R E A K P O I N T S

41. kristina.io @krstnfx
//
// Room.swift
// GasMask
//
import Foundation
class Room: NSObject, NSCoding {
var name: String?
var id: Int?
required init?(coder aDecoder: NSCoder) {
self.name = aDecoder.decodeObject(forKey: "names") as? String
self.id = aDecoder.decodeObject(forKey: "id") as? Int
}
func encode(with aCoder: NSCoder) {
aCoder.encode(self.name, forKey: "name")
aCoder.encode(self.id, forKey: "id")
}
}

42. kristina.io @krstnfx
//
// Room.swift
// GasMask
//
import Foundation
class Room: NSObject, NSCoding {
var name: String?
var id: Int?
required init?(coder aDecoder: NSCoder) {
self.name = aDecoder.decodeObject(forKey: "names") as? String
self.id = aDecoder.decodeObject(forKey: "id") as? Int
}
func encode(with aCoder: NSCoder) {
aCoder.encode(self.name, forKey: "name")
aCoder.encode(self.id, forKey: "id")
}
}

43. kristina.io @krstnfx
//
// Room.swift
// GasMask
//
import Foundation
class Room: NSObject, NSCoding {
var name: String?
var id: Int?
required init?(coder aDecoder: NSCoder) {
self.name = aDecoder.decodeObject(forKey: "names") as? String
self.id = aDecoder.decodeObject(forKey: "id") as? Int
}
func encode(with aCoder: NSCoder) {
aCoder.encode(self.name, forKey: "name")
aCoder.encode(self.id, forKey: "id")
}
}

44. kristina.io @krstnfx
struct Rooms: Codable {
var name: String
var id: Int
}

45. kristina.io @krstnfx
C U S T O M C O D E S N I P P E T S
1. Highlight code
2. Drag to code snippets window
3. Drop & fill completion shortcut

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C U S T O M C O D E S N I P P E T S I N U S E
4. Profit 💵

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💨

49. kristina.io @krstnfx
😪

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✅
Second stage
complete

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🚪

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👏123

53. B A S E D O N A T R U E S T O RY
Just kidding 😁

54. kristina.io @krstnfx
X C O D E S U R V I VA L G U I D E C H E AT S H E E T
Name Location Shortcut
Color Assets Assets Folder Add Color Set
Lock Storyboard Identity Inspector Lock - All Properties
Side-By-Side Editors View -> Assistant Editor All Editors Stacked Horizontally
Place File In Editor Keyboard/Mouse Alt-Shift (Click On File)
Select Code Structure Keyboard/Mouse Command-Click (On Function)

55. kristina.io @krstnfx
X C O D E S U R V I VA L G U I D E C H E AT S H E E T
Name Location Shortcut
Pre-Xcode 8 Style Jump
Xcode Settings ->
Navigation
Command-Click On Code ->Jumps To
Definition
User Defined
Environment Variables
Project File -> Build
Settings
Add variables to User-Defined Settings
Device Logs For
Crashes
Window -> Devices And
Simulators
View Device Logs
Catch All Breakpoints Breakpoints Panel Plus Button On Bottom Left
Custom Code Snippets Code Snippet Library
Highlight Code, Drag & Drop Into Code
Snippet Library

56. kristina.io @krstnfx
R E S O U R C E S
• Paul Hudson’s Swift Knowledge Base
https://www.hackingwithswift.com/example-code/
• API Endpoint Configuration
https://medium.com/@danielgalasko/change-your-api-endpoint-environment-using-xcode-
configurations-in-swift-c1ad2722200e
• Type Safe JSON in Swift
https://medium.com/grand-parade/creating-type-safe-json-in-swift-74a612991893
• WWDC-Style Code Snippets
https://kristina.io/tutorial-wwdc-style-live-code-snippets/
• Twitter iOS Community (@twostraws, @aligatr, @_inside & many more!)
https://twitter.com/krstnfx/status/940265683690180608

57. Thanks!
5
kristina.io | @krstnfx