swift -> AlertController 弹出菜单视图

 

• 底部弹出菜单 actionSheet 样式

 

        //底部弹窗框
        let bomAlert = UIAlertController(title: "我是标题", message: "我是描述", preferredStyle: .actionSheet)
        let cancelAction = UIAlertAction(title: "取消", style: .cancel, handler: nil);
        let delAction = UIAlertAction(title: "删除", style: .destructive, handler: nil);
        let saveAction = UIAlertAction(title: "保存", style: .default, handler: {(UIAlertAction) -> Void in
            print("do save");
        })
        bomAlert.addAction(cancelAction)
        bomAlert.addAction(delAction)
        bomAlert.addAction(saveAction)
        self.present(bomAlert, animated: true, completion: nil)

  

 

其中如果是ipad 弹出底部菜单可能会报错

需要做如下修改 

修改前

@IBAction func alert(sender: UIButton) {
        let alertController = UIAlertController(title: "My first app", message: "Hello World", preferredStyle: .ActionSheet)
        alertController.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        self.presentViewController(alertController, animated: true, completion: nil)
    }

 

 修改后

@IBAction func alert(sender: UIButton) {
        let alertController = UIAlertController(title: "My first app", message: "Hello World", preferredStyle: .ActionSheet)
        //ipad使用，不加ipad上会崩溃
        if let popoverController = alertController.popoverPresentationController {
            popoverController.sourceView = sender
            popoverController.sourceRect = sender.bounds
        }
        alertController.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        self.presentViewController(alertController, animated: true, completion: nil)
    }

 

参考： http://blog.youkuaiyun.com/it_liuwei/article/details/49102227

 

显示结果:底部弹出窗口就会在 触发 弹出窗口的 按钮的 旁边显示

 

 

•  Alert 弹出样式 

        let bomAlert = UIAlertController(title: "我是标题", message: "我是描述", preferredStyle: .alert)
        let cancelAction = UIAlertAction(title: "取消", style: .cancel, handler: nil);
        let delAction = UIAlertAction(title: "删除", style: .destructive, handler: nil);
        bomAlert.addAction(cancelAction)
        bomAlert.addAction(delAction)
        self.present(bomAlert, animated: true, completion: nil)