justinmeiners/ios-color-wheel

A fully scalable, dynamically rendered color wheel for iOS.

ios-color-wheel

About

A fully scalable and dynamically rendered color picker for iOS.

Many other iOS color pickers work by sampling colors from a pre-rendered image of a color wheel. This approach limits the color picker to the size and quality of the static image. This project contains a color wheel that computes color values mathematically, and renders dynamically, giving a completely scalable UIView and more accurate color selection.

Technical

Color wheels visualize and define colors from hue, saturation, and brightness components (HSB color space). On the wheel, two of these components can be mapped to two-dimensional polar coordinates. Hue is defined by the angle on the wheel. Saturation is defined by the distance from the center. Brightness, the third component cannot also be mapped to the two dimensional surface so it must be controlled by a separate control such as a slider.

Includes

• Standalone ISColorWheel class (UIView subclass)
• Example project

ios-color-wheel's Issues

Calling 'setCurrentColor(:)' with UIColor.black, turns the entire color wheel black

Because black is not a supported color on the color wheel, calling 'setCurrentColor(:)' with UIColor.black, just turns the entire color wheel black. Anyone have any ideas for workaround on black color? My thought was just to add a 'brightness' slider or something and to allow the user to get a pseudo-black color.

Set a color to Color Wheel

I have rgb slider, and I need to update the Color Wheel with a new color, but your class not have method to update color, or has it? Thanks for the class, is amazing.

License

Hello there!

Would you be up for putting a license in your repo?

Cheers,
Marcus

selection circle is not moving if the circle is in edge of the color palatte

Selection circle couldnt move when its end of the circle sometimes. how to solve the issue

colorWheelDidChangeColor doesn't work in swift

Hello

Coud you please help how to implement the colorWheelDidChangeColor method in swift 2?
How do i set the delegate to self? That doesn't work: cw!.delegate = self

I tried it with this code:

var cw: ISColorWheel?
cw = ISColorWheel(frame:CGRectMake(size!.width / 2 - wheelSize!.width / 2, size!.height * 0.1, wheelSize!.width, wheelSize!.height))
cw!.continuous = true
self.view.addSubview(cw!)

And the action method:

func colorWheelDidChangeColor(colorWheel: ISColorWheel) {
view.backgroundColor = colorWheel.currentColor()
}

Thank you for your help.

Simon

Set pick point (set the current color)

Is there an easy way to set the pick point (current color)
colorWheel.setCurrentColor(UIColor.greenColor()) //I am working is swift
This give me a very artistic color wheel.

Rotate wheel

Hi,

This is a great color wheel implementation!

One thing I would like to do is rotate the wheel so the red hues are at the top. How can that be done please? (I assume simply applying a transform will result in incorrect colors being returned as the users pans across the wheel)

Float Architecture Problem

In the function setCurrentColor:, the hue, saturation, brightness, and alpha values are initialized as floats, instead of the CGFloats that the getHue: saturation: brightness: alpha: function accepts. This should be changed, as depending on the architecture CGFloats might not be a float (could be a double, for example). This will get the returned values as completely wrong (I was seeing 1.87 and whatnot when I discovered this, which caused the color wheel to look somewhat cool but totally incorrect).

Changing the types to CGFloats fixes this problem.

Main.Stroyboard is not opening at all with xcode 13.1

Main.Stroyboard is not opening at all with xcode 13.1,It's continously loading

TEst

• Create Swift Version
• Fix floating point problems
• AwakeFromNib

Not an issue, I just want to remove RED color from picker

I want to implement something like this one, not exactly same but similar color shades.

I have create something like this one using this code. but not look smooth .

Thanks