// 方法1
let alertSheet = UIActionSheet(title: alertTitle, delegate: nil, cancelButtonTitle: alertOK, destructiveButtonTitle: alertCancel)
alertSheet.showInView(self.view)

11.png

// 方法2
// 实例化时添加代理对象，同时注意添加协议
let alertSheet = UIActionSheet(title: alertTitle, delegate: self, cancelButtonTitle: alertOK, destructiveButtonTitle: alertCancel, otherButtonTitles: "警告", "提示", "通告")
alertSheet.showInView(self.view)

// 添加协议
class ViewController: UIViewController, UIActionSheetDelegate {
    
    override func viewDidLoad() {
        ...
    }
    ...
}

// 代理方法
// MARK: UIActionSheetDelegate
func actionSheet(actionSheet: UIActionSheet, clickedButtonAtIndex buttonIndex: Int) {
        let buttonTitle = actionSheet.buttonTitleAtIndex(buttonIndex)
        if buttonTitle == alertCancel
        {
            print("你点击了退出")
        }
        else if buttonTitle == alertOK
        {
            print("你点击了确定")
        }
        else
        {
            print("你点击了其他")
        }
}

22.png

// 方法3
// 1 实例化
let alertSheet = UIAlertController(title: alertTitle, message: alertMessage, preferredStyle: UIAlertControllerStyle.ActionSheet)
// 2 命令（样式：退出Cancel，警告Destructive-按钮标题为红色，默认Default）
let cancelAction = UIAlertAction(title: alertCancel, style: UIAlertActionStyle.Cancel, handler: nil)
let deleteAction = UIAlertAction(title: "删除", style: UIAlertActionStyle.Destructive, handler: nil)
let archiveAction = UIAlertAction(title: alertOK, style: UIAlertActionStyle.Default, handler: {
            action in
            print("OK")
})
alertSheet.addAction(cancelAction)
alertSheet.addAction(deleteAction)
alertSheet.addAction(archiveAction)
// 3 跳转
self.presentViewController(alertSheet, animated: true, completion: nil)

33.png

Swift - 操作表（UIActionSheet）的用法，也叫底部警告框：

2015041514394452781.png

1，下面创建一个操作表（或叫底部警告框）并弹出显示

import UIKit

class ViewController: UIViewController,UIActionSheetDelegate
 {
override func viewDidLoad() {
super.viewDidLoad()

 let 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, didDismissWithButtonIndex buttonIndex: Int) {     
print("点击了："+actionSheet.buttonTitleAtIndex(buttonIndex)!)
}
}