iPhone QRCode Generator n Decoder

I have to create an app in iPhone which can generate QRCode for Text,Mail,Map,Ph开发者_JAVA百科otos etc. And can also Decode the QRCode. Has anyboday have idea about its API or example?

Thanks in advance

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I usually use QR Code Encoder for QR generation and ZBar for decoding QR (It also works with other code standards)

They are very easy to use.