让playground执行异步操作

by 伍雪颖

import
UIKit

import
XCPlayground

XCPSetExecutionShouldContinueIndefinitely(continueIndefinitely:
true)

let
url =
NSURL(string:
"http://httpbin.org/get")

let
getTask =
NSURLSession.sharedSession().dataTaskWithURL(url!)
{

(data,response,error) ->
Void
in

let dictionary:
AnyObject? =

NSJSONSerialization.JSONObjectWithData(data, options:
nil, error:
nil)

println(dictionary)

}

getTask.resume()

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