我不知道我在做错什么我也很新的编程，所以我不是很好的调试。这是一个测试应用程序，以便我可以看到应用程序开发有多快。到目前为止，我已经得到了：
class ViewController: UIViewController,UITextViewDelegate {
var textView: UITextView!
init(nibName nibNameOrNil: String?,bundle nibBundleOrNil: NSBundle?) {
super.init(nibName: nibNameOrNil,bundle: nibBundleOrNil)
}
override func viewDidLoad() {
super.viewDidLoad()
var widthField = self.view.bounds.size.width - 10
var heightField = self.view.bounds.size.height - 69 - 221
var textFieldString: String! = ""
//Set up text field
self.textView = UITextView(frame: CGRectMake(5,64,widthField,heightField))
self.textView.backgroundColor = UIColor.redColor()
self.view.addSubview(self.textView)
//Set up the New button
var newButtonString: String! = "New Note"
var heightButton = 568 - heightField - 1000
let newButton = UIButton(frame: CGRect(x: 5,y: 5,width: widthField,height: 50)) as UIButton
UIButton.buttonWithType(UIButtonType.System)
newButton.setTitle(newButtonString,forState: UIControlState.Normal)
newButton.backgroundColor = UIColor.redColor()
newButton.addTarget(self,action: "buttonAction:",forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(newButton)
}
func buttonAction() {
println("tapped button")
}
}
当我按下iOS模拟器中的按钮时，我收到错误“无法识别的选择器发送到实例”。该应用程序打开正常，但按下按钮，它只是崩溃。
func buttonAction(){...
应该
func buttonAction(sender:UIButton!)
{
println("tapped button")
}
因为newButton的动作：“buttonAction”，所以。
