Question

我正在尝试在点击按钮时添加另一个子视图。

使用storyboard创建第一个视图，按钮操作正常。但是当我将新的viewcontroller视图添加为子视图并单击按钮时，应用程序在iPhone模拟器上与exc_bad_access崩溃。

这是代码：

override func viewDidLoad() {

    super.viewDidLoad() 
    let datePick : UIDatePicker = UIDatePicker(frame: CGRectMake(0, 0, 218, 216))
    datePick.backgroundColor = UIColor.whiteColor()
    datePick.layer.borderColor = UIColor.blackColor().CGColor
    datePick.layer.borderWidth = 5

    let actionView : UIView = UIView(frame: CGRectMake(0, 216, datePick.frame.width, 50))
    actionView.backgroundColor = UIColor.blackColor()
     self.view.addSubview(datePick)

    var cancelButton : UIButton = UIButton.buttonWithType(UIButtonType.System) as UIButton
    cancelButton.frame =  CGRectMake(datePick.frame.width-80, 5, 60, 40)
    cancelButton.setTitle("Cancel", forState: UIControlState.Normal)
    cancelButton.backgroundColor = UIColor.redColor()
    cancelButton.addTarget(self, action: "cancelPressed:", forControlEvents: UIControlEvents.TouchUpInside)
    actionView.addSubview(cancelButton)

    var doneButton   = UIButton.buttonWithType(UIButtonType.System) as UIButton
    doneButton.frame =  CGRectMake(20, 5, 60, 40)
    doneButton.backgroundColor = UIColor.greenColor()
    doneButton.setTitle("Done", forState: .Normal)
    doneButton.addTarget(self, action: "buttonAction:",forControlEvents:UIControlEvents.TouchUpInside)
     self.view.addSubview(actionView)
    actionView.addSubview(doneButton)

   // datePicker.frame = CGRectMake(0, 0, 218, 216);
    // Do any additional setup after loading the view, typically from a nib.

}


func buttonAction(sender:UIButton!)
{
    println("Button tapped")
}

func cancelPressed(sender: UIButton!) {

    println("Cancel Clicked!!!")

}

从第一个viewcontroller的视图调用的IBAction方法是：

  @IBAction func dateSelectClicked (sender:AnyObject){

    var datePicker = DatePicker()
    datePicker.view.frame = CGRectMake(0, self.view.frame.height, self.view.frame.width, self.view.frame.height)

    let isfinished : Bool = true
    self.view.addSubview(datePicker.view)

    UIView.animateWithDuration(0.5, delay: 1.0 , options: UIViewAnimationOptions.CurveEaseInOut, animations: { datePicker.view.frame = CGRectMake(0, self.view.frame.height-266, self.view.frame.width, self.view.frame.height)}, completion: {(isfinished) in println("finished")})

}

Answer 1

更改以下两行：

self.view.addSubview(actionView)
actionView.addSubview(doneButton)

为：

actionView.addSubview(doneButton)
self.view.addSubview(actionView)

Answer 2

最后我发现了问题：

如有问题，DatePicker viewcontroller正在添加为：

 var datePicker = DatePicker()

点击按钮。（func dateSelectClicked）

所以这是创建DatePicker实例的问题。

我们需要将其创建为方法外的方法：

 Class firstViewController :UIViewController {
      var datePicker = DatePicker()
   }

并在方法self.datepicker

中用作属性

uibutton上的exc_bad_access单击使用Xcode 6和Swift语言

2 个答案: