Swift - 操作表（UIActionSheel）的用法，也叫底部警告框

1，下面创建一个操作表（或叫底部警告框）并弹出显示

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class ViewController: UIViewController,UIActionSheetDelegate {     override func viewDidLoad() {         super.viewDidLoad()                  var actionSheet=UIActionSheet()         //actionSheet.title = "请选择操作"         actionSheet.addButtonWithTitle("取消")         actionSheet.addButtonWithTitle("动作1")         actionSheet.addButtonWithTitle("动作2")         actionSheet.cancelButtonIndex=0         actionSheet.delegate=self         actionSheet.showInView(self.view);     }       func actionSheet(actionSheet: UIActionSheet!,clickedButtonAtIndex buttonIndex:Int){             println("点击了："+actionSheet.buttonTitleAtIndex(buttonIndex))     } }

2，在一般情况下，工具条，或标签条中显示的调用方式是不一样的

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actionSheet.showInView(self.view);  //一般情况 actionSheet.showFromToolbar(self.navigationController.toolbar)  //工具条的情况下 actionSheet.showFromTabBar(self.tabBar)  //标签条的情况下