ChromaColorPicker 🎨

An intuitive iOS color picker built in Swift.

Supports hue and grayscale modes to make choosing the right color easy and fun!

❗ Project Status ❗

Nov 10, 2018

After some time away from my OSS projects, I am revisiting a number of them. ChromaColorPicker will be recieving updates over the coming weeks. If you'd like to recieve development builds (not recommended for production as the API may change), check out the develop branch.

Some changes you can look forward to are:

• A new, easier to use, API for using the picker.
  • For migration purposes, I plan to bridge the current API to a new one while people migate.
• An updated style for the picker which is more appealing.
• A rewrite of layout logic using Autolayout.
• Multiple types of color pickers to fit your needs (Hue selection (current), color spectrum, etc).

Installation

Carthage

github "joncardasis/ChromaColorPicker"

Cocoapods

pod 'ChromaColorPicker'

Manually

Add all files from the ChromaColorPicker folder to your project.

Examples

let neatColorPicker = ChromaColorPicker(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
neatColorPicker.delegate = self //ChromaColorPickerDelegate
neatColorPicker.padding = 5
neatColorPicker.stroke = 3
neatColorPicker.hexLabel.textColor = UIColor.white

view.addSubview(neatColorPicker)

If the ChromaColorPicker or any of its properties are later updated after being added to a view, the layout() function should be called to update the view.

let neatColorPicker = ChromaColorPicker(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
view.addSubview(neatColorPicker)

neatColorPicker.padding = 0
neatColorPicker.hexLabel.hidden = true

neatColorPicker.layout()

You can also set the color of the picker anytime by using the adjustToColor(color:) function.

let neatColorPicker = ChromaColorPicker(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
...
neatColorPicker.adjustToColor(UIColor.green)
...

Enable Grayscale Support

A toggle button can be enabled/disabled to allow for grayscale selections by using the supportsShadesOfGray property.

let neatColorPicker = ChromaColorPicker(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
...
neatColorPicker.supportsShadesOfGray = true // Normally false be default

Customization

Properties

Property	Description
delegate	ChromaColorPickerDelegate
padding	The padding on each side of the view (default=10)
stroke	The stroke of the rainbow track (default=1)
currentColor	The currently set color by the control. It is displayed in the add button. Use adjustToColor(color: UIColor) to update the color.
currentAngle	The angle which the handle is currently sitting at. Can be changed and the view can be re-drawn using layout() to show the change.
handleSize	Returns the size of the handle.
supportsShadesOfGray	True/False if a toggle for supporting grayscale colors should be shown.

Functions

Function	Description
layout()	Layout the entire picker and all its subviews.
adjustToColor(color: )	Updates the picker to a specific color.

Sub-Components

Sub-Components can be hidden and customized to the preferred liking.

Component	Description
hexLabel	A UILabel which displays the hex value of the current color.
shadeSlider	A custom slider which adjusts the shade of the current color.
addButton	A custom UIButton in the center of the control. The colorPickerDidChooseColor(colorPicker: color:) delegate function is called when this is tapped.
handleView	A ChromaHandle (custom UIView) which displays the current color and can be moved around the circle.
handleLine	A line which is drawn from the addButton to the handleView.
colorToggleButton	A custom UIButton which appears if supportsShadesOfGray is set to true and will switch the picker to a grayscale mode if pressed.

Supported UIControlEvents

.touchDown -> called when the handle is first grabbed

.touchUpInside -> called when handle is let go

.valueChanged -> called whenever the color has changed hue or shade

.touchDragInside -> called when the handle has moved by a drag action

.editingDidEnd -> called when either the handle is let go or slider is let go

Additional Info

Check out the Wiki if you're interested in reading into how the color wheel was created.

License

ChromaColorPicker is available under the MIT license. See the LICENSE file for more info.