UIAlertController

自iOS8起，苹果就建议告警框使用UIAlertController来代替UIAlertView

在ViewDidLoad中加载时报错  whose view is not in the window hierarchy! 视图没创建出来之前是不能弹出来的

解决办法,延长时间加载

1.一般的提示框

func normalController(){
    let alertController = UIAlertController(title: "温馨提示", message: "还是UIAlertController好用!", preferredStyle: UIAlertControllerStyle.Alert)
    let cancelAction = UIAlertAction(title: "取消", style: UIAlertActionStyle.Cancel, handler: nil)
    let okAction = UIAlertAction(title: "确定", style: .Default, handler: { (alertC:UIAlertAction!) -> Void in
        //确定后相关操作在这里写
        print("确定")
    })
    alertController.addAction(cancelAction)
    alertController.addAction(okAction)
    self.presentViewController(alertController, animated: true) { () -> Void in
        print("弹框出来的时候调用")
    }
}

2.底部弹框

func sheetController(){
    let alertController = UIAlertController(title: "保存或删除数据", message: "删除之后不可恢复", preferredStyle: UIAlertControllerStyle.ActionSheet)
    let cancelAction = UIAlertAction(title: "取消", style: .Cancel, handler: nil)
    //.Destructive文字变红警示用户
    let deleteAction = UIAlertAction(title: "删除", style: .Destructive) { (alertC:UIAlertAction!) -> Void in
        print("毁灭了!")
    }
    let archiveAction = UIAlertAction(title: "保存", style: .Default) { (alertC : UIAlertAction!) -> Void in
        print("保存了!")
    }
    alertController.addAction(cancelAction)
    alertController.addAction(deleteAction)
    alertController.addAction(archiveAction)
    self.presentViewController(alertController, animated: true) { () -> Void in
        print("创建底部弹框")
    }
}

3.文本输入框

func textController(){
    let alertConreoller = UIAlertController(title: "登录", message: "请输入账号和密码", preferredStyle: .Alert)
    alertConreoller.addTextFieldWithConfigurationHandler { (textField:UITextField!) -> Void in
        textField.placeholder = "请输入账号名称"
    }
    alertConreoller.addTextFieldWithConfigurationHandler { (textField : UITextField!) -> Void in
        textField.placeholder = "请输入密码"
        textField.secureTextEntry = true//不让别人看到输入的密码
    }
    let cancelAction = UIAlertAction(title: "取消", style: .Cancel, handler: nil)
    let LoginAction = UIAlertAction(title: "登录", style: .Default) { (alertC : UIAlertAction!) -> Void in
        //确定后的操作
        let userName = alertConreoller.textFields?.first?.text
        let passWorld = alertConreoller.textFields?.last?.text
        print(userName!,passWorld!)
    }
    alertConreoller.addAction(cancelAction)
    alertConreoller.addAction(LoginAction)
    self.presentViewController(alertConreoller, animated: true) { () -> Void in
        print("创建了文本输入框")
    }
    
    //        self.performSelector(Selector("dismissController"), withObject: alertConreoller, afterDelay: 3)
}

可以定时出现与消失

self.performSelector(Selector("dismissController"), withObject: alertConreoller, afterDelay: 3)

func dismissController(){
    //移除文本提示框
    self.presentedViewController?.dismissViewControllerAnimated(false, completion: nil)
}