零零乙 2014-06-03 10:35 采纳率: 33.3%
浏览 828
已采纳

如何在 Swift 中创建一个 UIAlertView?

I have been working to create a UIAlertView in Swift, but for some reason I can't get the statement right because I'm getting this error:

Could not find an overload for 'init' that accepts the supplied arguments

Here is how I have it written:

let button2Alert: UIAlertView = UIAlertView(title: "Title", message: "message",
                     delegate: self, cancelButtonTitle: "OK", otherButtonTitles: nil)

Then to call it I'm using:

button2Alert.show()

As of right now it is crashing and I just can't seem to get the syntax right.

转载于:https://stackoverflow.com/questions/24022479/how-would-i-create-a-uialertview-in-swift

  • 写回答

30条回答 默认 最新

  • 乱世@小熊 2014-06-03 10:48
    关注

    From the UIAlertView class:

    // UIAlertView is deprecated. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead

    On iOS 8, you can do this:

    let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
    alert.addAction(UIAlertAction(title: "Click", style: UIAlertActionStyle.Default, handler: nil))
    self.presentViewController(alert, animated: true, completion: nil)
    

    Now UIAlertController is a single class for creating and interacting with what we knew as UIAlertViews and UIActionSheets on iOS 8.

    Edit: To handle actions:

    alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { action in
        switch action.style{
        case .Default:
            print("default")
    
        case .Cancel:
            print("cancel")
    
        case .Destructive:
            print("destructive")
        }
    }}))
    

    Edit for Swift 3:

    let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.alert)
    alert.addAction(UIAlertAction(title: "Click", style: UIAlertActionStyle.default, handler: nil))
    self.present(alert, animated: true, completion: nil)
    

    Edit for Swift 4:

    let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.alert)
    alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
          switch action.style{
          case .default:
                print("default")
    
          case .cancel:
                print("cancel")
    
          case .destructive:
                print("destructive")
    
    
    }}))
    self.present(alert, animated: true, completion: nil)
    

    展开全部

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(29条)
编辑
预览

报告相同问题?

悬赏问题

  • ¥15 来个会搭建付费网站的有偿
  • ¥100 有能够实现人机模式的c/c++代码,有图片背景等,能够直接进行游戏
  • ¥20 校园网认证openwrt插件
  • ¥15 以AT89C51单片机芯片为核心来制作一个简易计算器,外部由4*4矩阵键盘和一个LCD1602字符型液晶显示屏构成,内部由一块AT89C51单片机构成,通过软件编程可实现简单加减乘除。
  • ¥15 求GCMS辅导数据分析
  • ¥30 SD中的一段Unet下采样代码其中的resnet是谁跟谁进行残差连接
  • ¥15 Unet采样阶段的res_samples问题
  • ¥60 Python+pygame坦克大战游戏开发实验报告
  • ¥15 R语言regionNames()和demomap()无法选中中文地区的问题
  • ¥15 Open GL ES 的使用
手机看
程序员都在用的中文IT技术交流社区

程序员都在用的中文IT技术交流社区

专业的中文 IT 技术社区,与千万技术人共成长

专业的中文 IT 技术社区,与千万技术人共成长

关注【CSDN】视频号,行业资讯、技术分享精彩不断,直播好礼送不停!

关注【CSDN】视频号,行业资讯、技术分享精彩不断,直播好礼送不停!

客服 返回
顶部