I have been working in AVAudioPlayer and I would like to draw a wave form which looks look like this:

I have been working in AVAudioPlayer and I would like to draw a wave form which looks look like this:

Following project source code can help you:
https://github.com/ioslovers/ATTabandHoldAudioRecord
Other than this, apple provides this sample code: https://developer.apple.com/library/ios/samplecode/SpeakHere/Introduction/Intro.html
Other same stack overflow replays which is showing real time ploting: https://stackoverflow.com/a/2402899/905514