Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Requirements

Installation

DRAuraButton is available through a non official CocoaPods repository. To install it, simply add the following lines to your Podfile:

source 'https://github.com/DeRunco/cocoapods/'
pod "DRAuraButton"

About

DRAuraButton is a UIButton with a subview that displays a rotating circle. Multiple configuration of stroke width, radius, color and speed can be specified. Going from one configuration to another is animated.

This project was done mainly as a first approch to Core Animation framework -- it uses CABasicAnimations to animates transition between states.

Instantiate

Any storyboard button can be set to be a DRAuraButton.

States

The button presents arbitrary states, defined by the developer.

A state is defined by a set of properties, stored in a DRAuraConfiguration object. Among those properties are the ID. It serves as state identifier (see DRAuraButton.currentStateID). All states must have a unique ID.

To create and add a new state, use DRAuraButton addAuraConfiguration: method:

[myButton addAuraConfiguration:^(DRAuraConfiguration *c) {
    c.ID = @"my State name";
    c.width = 2.;
    c.space = 7.;
    c.offset = 6.;
    c.step = 0.04;
    c.animationDuration = 0.3;
    c.auraColor = [UIColor blackColor];
    c.buttonColor = [UIColor grayColor];
}];

To switch to that state, call setCurrentStateID: :

[myButton setCurrentStateID:@"my State name"];

To remove a state from the object, call removeAuraConfiguration: :

[myButton removeAuraConfiguration:@"my State name"];

Customizable properties

• Angle of rotation per frame: set DRAuraConfiguration.step. Greater is faster. Rotation is animated by NSTimer each 0.016s. As per NSTimer however, this time interval is not guaranteed.
• Space between the button and the circle: set DRAuraConfiguration.space. Greater is bigger
• Space between the top half and the bottom half: set DRAuraConfiguration.offset. This value is half the actual arc length between each arc.
  
• Stroke width: set DRAuraConfiguration.width. Greater is wider.
• Color of the stroke: set DRAuraConfiguration.auraColor.
• Color of the button's background layer: set DRAuraConfiguration.buttonColor.

License

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