ios7 - swift UIActionSheet

我创建了一个操作表，但问题是未调用委托(delegate)方法

 myActionSheet = UIActionSheet()
        myActionSheet.addButtonWithTitle("Add event")
        myActionSheet.addButtonWithTitle("close")
        myActionSheet.cancelButtonIndex = 1
        myActionSheet.showInView(self.view)

///UIActionSheetDelegate

func actionSheet(myActionSheet: UIActionSheet!, clickedButtonAtIndex buttonIndex: Int){
        if(myActionSheet.tag == 1){

            if (buttonIndex == 0){
                println("the index is 0")
            }
        }
}

我使用了另一种方法，该方法在iOS 8上运行良好，但在iOS 7上却无法运行:

var ActionSheet =  UIAlertController(title: "Add View", message: "", preferredStyle: UIAlertControllerStyle.ActionSheet)

ActionSheet.addAction(UIAlertAction(title: "Add event", style: UIAlertActionStyle.Default, handler:nil))

self.presentViewController(ActionSheet, animated: true, completion: nil)

有解决问题的主意吗？

最佳答案

您永远不会设置操作表的委托(delegate):

myActionSheet = UIActionSheet()
myActionSheet.delegate = self