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UUID (Universally Unique Identifier): A sequence of 128 bits that can guarantee uniqueness across space and time, defined by [RFC 4122][rfc4122].
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GUID (Globally Unique Identifier): Microsoft's implementation of the UUID specification; often used interchangeably with UUID.
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UDID _(Unique Device Identifier)): A sequence of 40 hexadecimal characters that uniquely identify an iOS device (the device's Social Security Number, if you will). This value can be retrieved through iTunes, or found using UIDevice -uniqueIdentifier. Derived from hardware details like MAC address.
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<?xml version="1.0" encoding="UTF-8"?> | |
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> | |
<plist version="1.0"> | |
<dict> | |
<key>PreferenceSpecifiers</key> | |
<array> | |
<dict> | |
<key>DefaultValue</key> | |
<string></string> | |
<key>Key</key> |
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101 Keynote | |
102 Platforms State of the Union | |
10004 Expanding automation with the App Store Connect API | |
10005 What's new in assessment | |
10006 Introducing Car Keys | |
10008 Optimize the Core Image pipeline for your video app | |
10009 Edit and play back HDR video with AVFoundation | |
10010 Export HDR media in your app with AVFoundation | |
10011 Author fragmented MPEG-4 content with AVAssetWriter | |
10012 Discover ray tracing with Metal |
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101 WWDC 2018 Keynote | |
102 Platforms State of the Union | |
103 Apple Design Awards | |
201 Creating Apps for a Global Audience | |
202 What's New in Cocoa Touch | |
203 I Have This Idea For An App... | |
204 Automatic Strong Passwords and Security Code AutoFill | |
205 Advances in Research and Care Frameworks | |
206 What's New in watchOS | |
207 Strategies for Securing Web Content |
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102 Platforms State of the Union | |
103 Apple Design Awards | |
201 Advanced Topics in Internationalization | |
202 What's New in Cocoa Touch | |
203 Introducing HealthKit | |
204 What's New in Cocoa | |
205 Creating Extensions for iOS and OS X, Part 1 | |
206 Introducing the Modern WebKit API | |
207 Accessibility on OS X |
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101: Keynote | |
102: Platforms State of the Union | |
103: Apple Design Awards | |
104: What's New in Xcode | |
105: Introducing WatchKit for watchOS 2 | |
106: What's New in Swift | |
107: What's New in Cocoa Touch | |
108: Building Watch Apps | |
201: iOS Accessibility | |
202: What's New in Cocoa |
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101 - Keynote | |
102 - Platforms State of the Union | |
103 - Apple Design Awards | |
201 - Internationalization Best Practices | |
202 - What's New in Accessibility | |
203 - What's New in Cocoa | |
204 - iMessage Apps and Stickers, Part 1 | |
205 - What's New in Cocoa Touch | |
206 - What's New in tvOS | |
207 - What's New in Foundation for Swift |
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101 - WWDC 2017 Keynote | |
102 - Platforms State of the Union | |
201 - What's New in Cocoa Touch | |
202 - Advances in TVMLKit | |
203 - Introducing Drag and Drop | |
204 - Updating Your App for iOS 11 | |
205 - What's New in watchOS | |
206 - Introducing Password AutoFill for Apps | |
207 - What's New in Cocoa | |
208 - Natural Language Processing and your Apps |
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101 Keynote | |
103 Platforms State of the Union | |
104 Apple Design Awards | |
202 Using Core Data With CloudKit | |
203 Introducing Desktop-class Browsing on iPad | |
204 Introducing SwiftUI: Building Your First App | |
205 Introducing iPad Apps for Mac | |
206 Introducing SF Symbols | |
207 Introducing SiriKit Media Intents | |
208 Creating Independent Watch Apps |
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The status bar in iOS 7 is transparent, the view behind it shows through.
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The style of the status bar refers to the appearances of its content. In iOS 7, the status bar content is either dark (
UIStatusBarStyleDefault
) or light (UIStatusBarStyleLightContent
). BothUIStatusBarStyleBlackTranslucent
andUIStatusBarStyleBlackOpaque
are deprecated in iOS 7.0. UseUIStatusBarStyleLightContent
instead.
- If below the status bar is a navigation bar, the status bar style will be adjusted to match the navigation bar style (
UINavigationBar.barStyle
):
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