SizeClasser

Device specific UITraitCollection helper with split view detection for iOS.

Demo

Requirements

• Swift 3.0+
• iOS 8.0+

Install

use_frameworks!
pod 'SizeClasser'

Usage

SizeClasser is an OptionSet type struct.
You can initilize it with your viewController's traitCollection property to identify your current device specific orientation and split view status.

let sizeClasser = SizeClasser(traitCollection: traitCollection)

Options:

/// Screen height is bigger than width. Portrait mode in all devices.
public static let portrait = SizeClasser(rawValue: 1 << 0)
/// Screen width is bigger than height. Landscape mode in all devices.
public static let landscape = SizeClasser(rawValue: 1 << 1)
/// Portrait mode for iPhone devices.
public static let iPhonePortrait = SizeClasser(rawValue: 1 << 2)
/// Landscape mode for iPhone devices.
public static let iPhoneLandscape = SizeClasser(rawValue: 1 << 3)
/// Portrait mode for iPad devices.
public static let iPadPortrait = SizeClasser(rawValue: 1 << 4)
/// Landscape mode for iPad devices.
public static let iPadLandscape = SizeClasser(rawValue: 1 << 5)
/// Split mode 1/3 of visible area in iPad devices.
public static let iPadSplitOneThird = SizeClasser(rawValue: 1 << 8)
/// Split mode 1/2 of visible area in iPad devices.
public static let iPadSplitHalf = SizeClasser(rawValue: 1 << 9)
/// Split mode 2/3 of visible area in iPad devices.
public static let iPadSplitTwoThird = SizeClasser(rawValue: 1 << 10)

For example, if you want to detect iPad split view 1/3 on landscape orientation, simply:

guard let trait = SizeClasser(traitCollection: traitCollection) else { return }
if trait.contains([.iPadLandscape, .iPadSplitOneThird]) {
  // You are on iPad, landscape and 1/3 split view mode
  if SizeClasser.isiPadPro {
    // You are on 12.9" iPad
  } else {
    // You are on regular iPad / iPad mini
  }
}

Also you can use SizeClasser.isiPadPro to detect 12.9" iPad Pro if you want to layout your views more specificly.

Note on traitCollectionDidChange:previousTraitCollection function:

This function only get called if traitCollection changes.
If you are on iPad, either portrait or landscape mode, it won't change 1/3 split view to 2/3 split view transitions.
iOS calculates them both compact width regular height mode.
So, I recommend to use viewDidLayoutSubviews: function to detect split view changes specificly.