Color Picker
Background
A color picker is the most conspicuously absent component in the collection of built-in controls provided by Apple in the iOS library. There are many open-source components that have sprung up to fill the gap. This component was created for the [ToonThat][https://itunes.apple.com/us/app/toonthat/id584478951?ls=1&mt=8] application as we didn't find the level of flexibility and feature-set in the others.
Screenshots
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Features
- Shows a simple color pallete (simplifies the simple case).
- iPhone 5 ready - color pallete expands to fill larger screen.
- Hue grid - more variations of primary color. Color line in the bottom can be tapped to select color or grid can be swiped left and right.
- HSL selector - for fine grain color selection, presents Hue circle and separate saturation and luminosity controls.
- Alpha selector
- Allows users to save their favorite colors. Favorites are stored in a file in the Documents directory.
- Simple delegate model.
- You can specify current color selection and title for header.
Usage
In your view controller where you want to invoke the color picker, first implement the methods of the delegate:
@implementation MyViewController <NEOColorPickerViewControllerDelegate>
Assuming you want to launch the view controller in response to a button being clicked, setup and launch an instance of NEOColorPickerViewController:
NEOColorPickerViewController *controller = [[NEOColorPickerViewController alloc] init];
controller.delegate = self;
controller.currentColor = <some initial color reference>;
controller.dialogTitle = @"My dialog title";
[self presentViewController:controller animated:YES completion:nil];
Finally handle the color picker delegate callback when the color is selected. You can also implement an optional callback that is called when the color picker is dismissed:
- (void) colorPickerViewController:(NEOColorPickerBaseViewController *)controller didSelectColor:(UIColor *)color {
// Do something with the color.
self.view.backgroundColor = color;
[controller dismissViewControllerAnimated:YES completion:nil];
}