PlaybackButton

iOS animation playback button inspired by the playback button of YouTube for web.

##Installation

####CocoaPods

pod 'PlaybackButton'

####Manually Add the PlaybackButton.swift file to your project.

##Usage

###Setup

Add import PlaybackButton in your file

In your ViewController:

@IBOutlet weak var playbackButton: PlaybackButton!

self.playbackButton.layer.cornerRadius = self.playbackButton.frame.size.height / 2
self.playbackButton.layer.borderWidth = 2.0
self.playbackButton.adjustMargin = 1
self.playbackButton2.duration = 0.3 // animation duration default 0.24

@IBAction func didTapPlaybackButton(sender: AnyObject) {
    if self.playbackButton.buttonState == .Playing {
        self.playbackButton.setButtonState(.Pausing, animated: true)
    } else if self.playbackButton.buttonState == .Pausing {
        self.playbackButton.setButtonState(.Playing, animated: true)
    }
}

var playbackButton: PlaybackButton!

self.playbackButton = PlaybackButton(frame: CGRect(x: 0, y:20, width: 100, height: 100 ))
self.playbackButton.contentEdgeInsets = UIEdgeInsets(top: 8, left: 8, bottom: 8, right: 8)
self.playbackButton.adjustMargin = 0 
self.playbackButton.addTarget(self, action: "didTapPlaybackButton:", forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(self.playbackButton)

func didTapPlaybackButton(sender: AnyObject) {
    if self.playbackButton.buttonState == .Playing {
        self.playbackButton.setButtonState(.Pausing, animated: true)
    } else if self.playbackButton.buttonState == .Pausing {
        self.playbackButton.setButtonState(.Playing, animated: true)
    }
}

note1: 
The position of PlaybackButton is based on top and left of ContentEdgeInsets.
Please regulate it at the position where wants to locate it.

note2: 
The value of adjustMargin, please appoint 0-1.
The default is 0.
The left position of play becomes same as pause when adjustMargin is 1.
It is suitable to place PlaybackButton in the middle of view in the case of 0.