问在Swift中的Xcode信号SIGABRT

EN

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var button0: UIButton!
    @IBAction func buttonPressed0(sender: AnyObject) {
        println("It works!")
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }       
}