UIColor enhancements

[jlandon]

Added

• Color model enum (support for rgb, hsl, hsb, cmyk, and hex)
• Computed properties on UIColor for hsl, hsb, and cmyk components
• Initializers on UIColor for hsl and cmyk
• Default alpha argument to existing initializers

  Updated

• Lighten/darken color APIs
  • The previous APIs left much to be desired, as they used a color's HSB values to adjust the lightness of the color. This led to situations where a color would not be lightened (no matter what value was specified), as shown below:
  • The updated APIs now provide expected behavior, as shown below:
  • As shown above, there is also a new operator to make the API a bit more clear. While CGFloat values between 0.0 and 1.0 may still be used, the % operator may also be used to achieve the same behavior. Example: color.darken(by: 0.5) == color.darken(by: 50%)

    Deprecated

• lighterColorByPercentage and darkerColorByPercentage
• RGBAComponents (renamed to rgba)
• redComponent (in favor of rgba.r)
• greenComponent (in favor of rgba.g)
• blueComponent (in favor of rgba.b)

[hsoi]

A bunch of good changes. I think it really cleans up the color APIs to be more complete and consistent.

[krider2010]

👏 Operators.swift 🎉

[krider2010]

👍

[hsoi]

Just add the preamble to Operators.swift (the legal boilerplate, etc.) and then 👍