How to save UIImage into byte using swift ?

Tricks to convert UIImage into byte :-

1st convert UIImage() to NSData() .

Then pass the NSData to the

getArrayOfBytesFromImage() and get the return as NSMutableArray 

func getArrayOfBytesFromImage(imageData:NSData) -> NSMutableArray
{

    // the number of elements:
    let count = imageData.length / sizeof(UInt8)

    // create array of appropriate length:
    var bytes = [UInt8](count: count, repeatedValue: 0)

    // copy bytes into array
    imageData.getBytes(&bytes, length:count * sizeof(UInt8))

    var byteArray:NSMutableArray = NSMutableArray()

    for (var i = 0; i < count; i++) {
        byteArray.addObject(NSNumber(unsignedChar: bytes[i]))
    }

    return byteArray


}

It is always recommended that .. we should save NSData of UIImage in local DB