IOS
- Getting started with iOS
- Learn Tutorial
- Overview
- Xcode Basics
- Create iOS Project
- Add UI Elements
- Views Hierarchy
- UIKit
- Define Views
- Access Subviews
- Action & Outlet
- Create iOS App with Multiple Views
- Add Navigation Controller
- How to Configure Table View
- Add iOS Table View and Data Source
- Sections & Headings
- Table View Delegate Behavior
- Custom Table View Cell
- Create iOS UI with Auto Layout
- Create Flexible Layouts with Stack Views
- Adaptive UI Using Traits and Size Classes
- Create a Tabbed Application
- Add a Toolbar
- Add Swipe Actions
- Add an Alert
- Images & Application Icon
- Launch Screen
- 3D Touch
- Accessibility
- ADDING A SWIFT BRIDGING HEADER
- AFNetworking
- AirDrop
- AirPrint tutorial in iOS
- Alamofire
- App Submission Process
- App Transport Security (ATS)
- App wide operations
- AppDelegate
- Application rating/review request
- ARC (Automatic Reference Counting)
- attributedText in UILabel
- Auto Layout
- AVPlayer and AVPlayerViewController
- AVSpeechSynthesizer
- AWS SDK
- Background Modes
- Background Modes and Events
- Basic text file I/O
- Block
- CAAnimation
- Cache online images
- CAGradientLayer
- CALayer
- Carthage iOS Setup
- CAShapeLayer
- Categories
- CGContext Reference
- Chain Blocks in a Queue (with MKBlockQueue)
- Change Status Bar Color
- Checking for Network Connectivity
- Checking iOS version
- CLLocation
- CloudKit
- Codable
- Code signing
- Concurrency
- Configure Beacons with CoreBluetooth
- Contacts Framework
- Content Hugging/Content Compression in Autolayout
- Convert HTML to NSAttributed string and vice verse
- Convert NSAttributedString to UIImage
- Core Data
- Core Graphics
- Core Location
- Core Motion
- Core SpotLight in iOS
- CoreImage Filters
- Create .ipa File to upload on appstore with Applicationloader
- Create a Custom framework in iOS
- Create a video from images
- Creating an App ID
- CTCallCenter
- Custom fonts
- Custom Keyboard
- Custom methods of selection of UITableViewCells
- Custom methods of selection of UITableViewCells
- Custom UITextField
- Custom UIViews from XIB files
- Cut a UIImage into a circle
- CydiaSubstrate tweak
- Debugging Crashes
- Deep Linking in iOS
- DispatchGroup
- Dynamic Type
- Dynamically updating a UIStackView
- EventKit
- Extension for rich Push Notification - iOS 10.
- Face Detection Using CoreImage/OpenCV
- FacebookSDK
- Fastlane
- FCM Messaging in Swift
- FileHandle
- GameCenter Leaderboards
- GameplayKit
- GCD (Grand Central Dispatch)
- Graph (Coreplot)
- Guideline to choose best iOS Architecture Patterns
- Handle Multiple Environment using Macro
- Handling URL Schemes
- Healthkit
- iBeacon
- IBOutlets
- In-App Purchase
- Initialization idioms
- iOS - Implementation of XMPP with Robbie Hanson framework
- iOS 10 Speech Recognition API
- iOS Google Places API
- iOS TTS
- Key Value Coding-Key Value Observation
- Keychain
- Load images async
- Localization
- Make selective UIView corners rounded
- Managing the Keyboard
- MKDistanceFormatter
- MKMapView
- ModelPresentationStyles
- MPMediaPickerDelegate
- MPVolumeView
- Multicast Delegates
- MVP Architecture
- MVVM
- MyLayout
- Navigation Bar
- NSArray
- NSAttributedString
- NSBundle
- NSData
- NSDate
- NSHTTPCookieStorage
- NSInvocation
- NSNotificationCenter
- NSPredicate
- NSTimer
- NSURL
- NSURLConnection
- NSURLSession
- NSUserActivity
- NSUserDefaults
- Objective-C Associated Objects
- OpenGL
- Passing Data between View Controllers
- Passing Data between View Controllers (with MessageBox-Concept)
- PDF Creation in iOS
- plist iOS
- Profile with Instruments
- Push Notifications
- QR Code Scanner
- Realm
- Resizing UIImage
- Rich Notifications
- Runtime in Objective-C
- Safari Services
- Security
- Segues
- Set View Background
- Simulating Location Using GPX files iOS
- Simulator
- Simulator Builds
- SiriKit
- Size Classes and Adaptivity
- Size Classes and Adaptivity
- SLComposeViewController
- Snapshot of UIView
- SqlCipher integration
- StoreKit
- Storyboard
- Swift and Objective-C interoperability
- Swift: Changing the rootViewController in AppDelegate to present main or login/onboarding flow
- SWRevealViewController
- UI Testing
- UIActivityViewController
- UIAlertController
- UIAppearance
- UIBarButtonItem
- UIBezierPath
- UIButton
- UICollectionView
- UIColor
- UIControl - Event Handling with Blocks
- UIDatePicker
- UIDevice
- UIFeedbackGenerator
- UIFont
- UIGestureRecognizer
- UIImage
- UIImagePickerController
- UIImageView
- UIKit Dynamics
- UIKit Dynamics with UICollectionView
- UILabel
- UILabel text underlining
- UILocalNotification
- UINavigationController
- UIPageViewController
- UIPheonix - easy, flexible, dynamic & highly scalable UI framework
- UIPickerView
- UIRefreshControl TableView
- UIScrollView
- UIScrollView AutoLayout
- UIScrollView with StackView child
- UISearchController
- UISegmentedControl
- UISlider
- UISplitViewController
- UISplitViewController
- UIStackView
- UIStoryboard
- UISwitch
- UITabBarController
- UITableView
- UITableViewCell
- UITableViewController
- UITextField
- UITextField Delegate
- UITextView
- UIView
- UIViewController
- UIWebView
- Universal Links
- Using Image Aseets
- UUID (Universally Unique Identifier)
- WCSessionDelegate
- WKWebView
- Xcode Build & Archive From Command Line
- XCTest framework - Unit Testing
IOS Images & Application Icon
In iOS, all the dimensions for placing any content on the screen is based on points, which map to pixels in the display.
- On a standard-resolution screen, or you can say on first original iPhones one point is equal to one pixel.
- High-resolution displays (Retina iPhone devices) have a higher pixel density because there are more pixels in the same amount of physical space, there are more pixels per point.
- A standard resolution image has a scale factor of 1.0 also knows as a @1x image, and high-resolution images have a scale factor of 2.0 or 3.0 and are known as @2x and @3x images.
| Device | Scale factor |
|---|---|
| iPhone X, iPhone 8 Plus, iPhone 7 Plus, and iPhone 6s Plus | @3x |
| All other high-resolution iOS devices | @2x |
Application/Home Screen Icon
All iOS applications you develop in Xcode will show up on the home screen using the default application icon.
So whether you test your app on a physical device or just run the app in the simulator, you will see this generic icon, white with gridlines. Every app must supply small icons for use on the Home screen and throughout the system once your app is installed, as well as a larger icon for display in the App Store.
| Device | Icon size |
|---|---|
| App Store | 1024px x 1024px (1024pt x 1024pt @1x) |
| iPhone | 180px x 180px (60pt x 60pt @3x) 120px x 120px (60pt x 60pt @2x) |
| iPad Pro | 167px x 167px (83.5pt x 83.5pt @2x) |
| iPad, iPad mini | 152px x 152px (76pt x 76pt @2x) |
Let's go to the XCode and click on Assets.xcassets file. It is designed to make your life easier when you're working with images for iOS applications that are supposed to be provided at those multiple different scales.
<img alt="image" src="https://raw.githubusercontent.com/zzzprojects/learn-orm/master/tutorials/ios/images/app-icon2.png"alt="App icon-2">
- By default, there is a placeholder area here for you to put your application icon.
- You can provide multiple icons here, for whether the app will show up in the Spotlight search results, or if it will provide its settings and should be listed in the iOS Settings app, etc.
- But the most important one is just the iPhone application icon, which for iPhone 7 (iOS 11) is 60 points, and needs to be provided at 2x scale and 3x scale.
Select the 2x and open attributes inspector.
It will tell you, even more, this works for an iPhone, for an iPad, it's not relevant for the Apple Watch. It tells you what Size is and what Scale should be.
We have two icons for our task list app, one of them at 120 x 120, and the other is 180 x 180.
Let's drag the 3x into the 3x placeholder, the 2x into the 2x placeholder.
Now run your application and tap the home button and you will see a new application icon.
