Class: Motion::LaunchImages

Inherits:
Object
  • Object
show all
Defined in:
lib/motion/launch_images.rb

Class Method Summary collapse

Class Method Details

.capture! ⇒ Object 



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# File 'lib/motion/launch_images.rb', line 24

def self.capture!
  screen = UIScreen.mainScreen
  height = screen.bounds.size.height
  scale = begin
    if !screen.respondsToSelector('displayLinkWithTarget:selector:')
      ''
    elsif screen.scale == 1.0
      ''
    elsif screen.scale == 2.0
      '@2x'
    elsif screen.scale == 3.0
      '@3x'
    else
      puts 'Error: Unable to determine screen scale'
      exit
    end
  end
  filename = generate_filename(height, scale)

  if scale != ''
    UIGraphicsBeginImageContextWithOptions(window.bounds.size, false, screen.scale)
  else
    UIGraphicsBeginImageContext(window.bounds.size)
  end

  window.layer.renderInContext(UIGraphicsGetCurrentContext())
  image = UIGraphicsGetImageFromCurrentImageContext()
  UIGraphicsEndImageContext()
  data = UIImagePNGRepresentation(image)
  data.writeToFile(filename, atomically:true)
  puts "Wrote to #{filename}"

  if should_rotate_and_take_again?(height)
    take!(:landscape)
  else
    exit
  end
end

.generate_filename(height, scale) ⇒ Object 



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# File 'lib/motion/launch_images.rb', line 63

def self.generate_filename(height, scale)
  filename = screenshot_path + 'Default'

  case height
  when 480 # iPhone 4s
  when 568 # iPhone 5s
    filename << '-568h'
  when 667 # iPhone 6
    filename << '-667h'
  when 736 # iPhone 6 Plus
    filename << '-736h'
  when 768 # iPad (Landscape)
    filename << '-Landscape'
  when 1024 # iPad (Portrait)
    filename << '-Portrait'
  else
    puts "Error: Invalid screen height #{height}"
    exit
  end

  filename << scale << '.png'
end

.needs_rotation?(orientation) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/motion/launch_images.rb', line 113

def self.needs_rotation?(orientation)
  status = UIApplication.sharedApplication.statusBarOrientation
  if orientation == :portrait && status == UIInterfaceOrientationPortrait
    false
  elsif orientation == :landscape && (status == UIInterfaceOrientationLandscapeLeft ||
                                      status == UIInterfaceOrientationLandscapeRight)
    false
  else
    true
  end
end

.rotate(to) ⇒ Object 



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# File 'lib/motion/launch_images.rb', line 103

def self.rotate(to)
  if to == :portrait
    value = NSNumber.numberWithInt(UIInterfaceOrientationPortrait)
  else
    value = NSNumber.numberWithInt(UIInterfaceOrientationLandscapeLeft)
  end

  UIDevice.currentDevice.setValue(value, forKey:'orientation')
end

.screenshot_path ⇒ Object 



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# File 'lib/motion/launch_images.rb', line 3

def self.screenshot_path
  NSBundle.mainBundle.objectForInfoDictionaryKey('screenshot_path')
end

.should_rotate_and_take_again?(height) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/motion/launch_images.rb', line 99

def self.should_rotate_and_take_again?(height)
  height == 1024 # iPad (Portrait)
end

.take!(orientation = :portrait) ⇒ Object 



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# File 'lib/motion/launch_images.rb', line 11

def self.take!(orientation = :portrait)
  return unless taking?

  Dispatch::Queue.main.async do
    if needs_rotation?(orientation)
      rotate(orientation)
      sleep 1.0
    end

    Dispatch::Queue.main.async { capture! }
  end
end

.taking? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/motion/launch_images.rb', line 7

def self.taking?
  screenshot_path != nil
end

.window ⇒ Object

ported from BubbleWrap to reduce dependencies



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# File 'lib/motion/launch_images.rb', line 87

def self.window
  normal_windows = UIApplication.sharedApplication.windows.select { |w|
    w.windowLevel == UIWindowLevelNormal
  }

  key_window = normal_windows.select { |w|
    w == UIApplication.sharedApplication.keyWindow
  }.first

  key_window || normal_windows.first
end