Get Unix Epoch time

To get Unix Epoch Time, use the constant timeIntervalSince1970:

Swift

let date = NSDate() // current date
let unixtime = date.timeIntervalSince1970

Objective-C

NSDate *date = [NSDate date]; // current date
int unixtime = [date timeIntervalSince1970];

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NSDate:

*NSDate

*NSDateFormatter

*Date Comparison

*Get Historic Time from NSDate eg 5s ago 2m ago 3h ago

*Get Unix Epoch time

*Get time cycle type 12-hour or 24-hour

*Get NSDate from JSON Date format Date1268123281843

*Get Current Date

*08Convert NSDate that is composed from hour and minute only to a full NSDate

*Time offset from NSDate with TimeZone

*Get NSDate Object N seconds from current date

Table Of Contents

0Getting started with iOS

1UILabel

2Change Status Bar Color

3Passing Data between View Controllers

4Managing the Keyboard

5UIButton

6UILocalNotification

7UIImageView

8Checking for Network Connectivity

12UIView

15UIColor

19UINavigationController

20Concurrency

21CAGradientLayer

22UIGestureRecognizer

23Custom UIViews from XIB files

24Safari Services

25UIStackView

26UIImage

27UIWebView

28CALayer

29Swift and Objective-C interoperability

30NSDate

31Custom Fonts

32AVSpeechSynthesizer

33UIBarButtonItem

34UIScrollView

35Localization

36NSNotificationCenter

37UITextField

38Networking with Alamofire

40iBeacon

44Checking iOS version

49NSTimer

53UIActivityViewController

58UIImagePickerController

59NSUserDefaults

60UIControl - Event Handling with Blocks

61UIBezierPath

62UIPageViewController

63UIAppearance

64Push Notifications

65Key Value Coding

66Initialization idioms

67Storyboard

68Background Modes and Events

69Fastlane

70CAShapeLayer

71WKWebView

72UUID Universally Unique Identifier

73Categories

74Handling URL Schemes

75Realm database

76ARC Automatic Reference Counting

77UIPickerView

78Dynamic Type

79NSURL

80SWRevealViewController

81Snapshot of UIView

82DispatchGroup

83GCD Grand Central Dispatch

84Size Classes and Adaptivity

85UIScrollView, AutoLayout

86IBOutlets

87AWS SDK

88Debugging Crashes

89UISplitViewController

90UISplitViewController

91UIDevice

92CloudKit

93GameplayKit

94XCode Build Archive From Command Line

95Unit Testing with XCTest

96NSData

97AVPlayer and AVPlayerViewController

98Deep Linking

99App Transport Security (ATS)

100Core Graphics

101Segues

102UIDatePicker

103NSPredicate

104EventKit

105NSBundle

106SiriKit

107Contacts Framework

108Dynamically updating a UIStackView

109Speech Recognition

110NSURLConnection

111StoreKit

112Code signing

113.ipa file to upload on appstore with ApplicationLoader

114Resizing UIImage

115Size Classes and Adaptivity

116MKDistanceFormatter

1173D Touch

118GameCenter Leaderboards

119Keychain

120Handle Multiple Environment using Macro

121Set View Background

122Block

123Content Hugging

124Google Places API

125Navigation Bar

126UITextField Delegate

127App-wide operations

128UILabel text underlining

129Cut a UIImage into a circle

130Make selective UIView corners rounded

131Convert HTML to NSAttributed string and vice versa

132Convert NSAttributedString to UIImage

133CoreImage Filters

134Face Detection Using CoreImageOpenCV

135MPMediaPickerDelegate

136Graph Coreplot

137NSHTTPCookieStorage

138FCM Messaging

139Create Custom Framework

140Custom Keyboard

141AirDrop

142SLComposeViewController

143AirPrint tutorial

144UISlider

145Carthage

146HealthKit

147Core SpotLight

148UI Testing

149Core Motion

150QR Code Scanner

151plist

152NSInvocation

153UIRefreshControl TableView

154WCSessionDelegate

155AppDelegate

156App Submission Process

157MVVM

158UIStoryboard

159Basic text file I/O

160Text To Speech (TTS)

161MPVolumeView

162Objective-C Associated Objects

163Passing Data between View Controllers

164UIPhoenix

165Blocks in Queue with MKBlockQueue

166Simulator

167BackgroundModes

168NSArray

169OpenGL

170UIScrollView with StackView child

171Cache online images

172MVP Architecture

173UIKit Dynamics

174Configure Beacons with CoreBluetooth

175Core Data

176Extension for rich Push Notification

177Profiling with Instruments

178Application rating review request

179MyLayout

180UIFont

181Simulator Builds

182Simulating Location Using GPX files

183Custom methods of selection of UITableViewCells

184Custom methods of selection of UITableViewCells

185UISegmentedControl

186SqlCipher integration

187Custom UITextField

188Custom UITextField

189Security

190Guideline to architecture patterns

191UIFeedbackGenerator

192UIKit Dynamics with UICollectionView

193Multicast Delegates

194Using image assets

195UITableViewCell

196Runtime in Objective-C

197ModelPresentationStyles

198CydiaSubstrate tweak

199Create a video from images

200Codable

201FileHandle

202NSUserActivity

203Rich Notifications

204Load images async

205Adding Swift bridging header

206Creating an App ID

207Changing the rootview controller

208Attributed text in UILabel

209UITableViewController

210Contributors