NSURL到NSData nil值

Question

I'm trying to convert NSURL to NSData . My url string is a local file url which I'm getting from my device.

    let url = NSURL(string: url)
    let imageData = NSData(contentsOfURL: url)
    let image = UIImage(data: imageData)

I'm getting NSURL value properly. But while converting it to NSData it gives nil value. I know there are similar questions in stackoverflow but none of them solves my problem. I'm using swift 2.2

Answer 1

If the string points to a local file url then you are using the wrong API. The correct one is

let url = NSURL(fileURLWithPath: urlString)

NSURL(string: is only for URL strings which start with a valid file scheme (eg http or ftp )

Answer 2

Try this code.

let urlString = "/var/mobile/Media/DCIM/101APPLE/IMG_1827.JPG"
let url = URL(fileURLWithPath: urlString)
let imageData = NSData(contentsOf: url)
let image = UIImage(data: imageData as! Data)

Answer 3

The Correct one is use contentsOf: forecastURL! as URL instead of contentsOf: forecastURL

  let forecastURL = NSURL(string: "http://photos.state.gov/libraries/media/788/images/90x90.gif")

  let testImage = NSData (contentsOf: forecastURL! as URL)

    print("data",testImage!)

    let image = UIImage(data: testImage! as Data)
    print("imaGE :-",image!)