Swift UI – 操作表（UIActionSheet）

注：代码已升级至Swift4

创建操作表

创建一个操作表（或叫底部警告框）并弹出显示

注：自iOS 8起，建议使用UIAlertController代替UIActionSheet。点击查看UIAlertController的用法

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)!)
    }
}

显示方式

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

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