How can I read a file in a swift playground

Question

Im trying to read a text file using a Swift playground with the following

let dirs : String[]? =    NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true) as? String[]  if (dirs != nil) {     let directories:String[] = dirs!;     let dir = directories[0]; //documents directory     let path = dir.stringByAppendingPathComponent(file);      //read     let content = String.stringWithContentsOfFile(path, encoding: NSUTF8StringEncoding, error: nil) } 

However this fails with no error. It seems the first line stops the playground from outputting anything below

Answer 1

You can also put your file into your playground's resources. To do this: show Project Navigator with CMD + 1. Drag and drop your file into the resources folder. Then read the file:

On XCode 6.4 and Swift 1.2:

var error: NSError? let fileURL = NSBundle.mainBundle().URLForResource("Input", withExtension: "txt") let content = String(contentsOfURL: fileURL!, encoding: NSUTF8StringEncoding, error: &error) 

On XCode 7 and Swift 2:

let fileURL = NSBundle.mainBundle().URLForResource("Input", withExtension: "txt") let content = try String(contentsOfURL: fileURL!, encoding: NSUTF8StringEncoding) 

On XCode 8 and Swift 3:

let fileURL = Bundle.main.url(forResource: "Input", withExtension: "txt") let content = try String(contentsOf: fileURL!, encoding: String.Encoding.utf8) 

If the file has binary data, you can use NSData(contentsOfURL: fileURL!) or Data(contentsOf: fileURL!) (for Swift 3).