swift 提示框大全

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常规提示框(显示位置在中间)

let alertController = UIAlertController(title:"提示哦",message:"我是提示信息",preferredStyle: .alert);
        let canceAction = UIAlertAction(title:"取消",style:.cancel,handler:nil);
        let okAciton = UIAlertAction(title:"确定",style:.default,handler: {
            action in
            print("他点击了确定")
        })
        alertController.addAction(canceAction);
        alertController.addAction(okAciton);
        self.present(alertController, animated: true, completion: nil)

//底部提示框

let alertController = UIAlertController(title:"选取照片",message:"请选择照片来源",preferredStyle: .actionSheet);
        let canceAction = UIAlertAction(title:"取消",style:.cancel,handler:nil);
        let photosAciton = UIAlertAction(title:"图库",style:.default,handler: {
            action in
            print("他点击了库图")
        })
        let CrameAction = UIAlertAction(title:"相机",style:.destructive,handler:{
            acion in
            print("他选择了相机")
        })
        alertController.addAction(canceAction);
        alertController.addAction(photosAciton);
        alertController.addAction(CrameAction);
        self.present(alertController, animated: true, completion: nil)

//带有输入框提示框

//        let alertController = UIAlertController(title:"系统登入",message:"请输入用户名和密码",preferredStyle: .alert);
//        alertController.addTextField { (textField:UITextField!) in
//            textField.placeholder = "用户名";
//        }
//        alertController.addTextField{(textField:UITextField!) in
//            textField.placeholder = "密码";
//            textField.isSecureTextEntry = true;
//
//        }
//        let canceAction = UIAlertAction(title:"取消",style:.cancel,handler:nil);
//                let okAciton = UIAlertAction(title:"确定",style:.default,handler: {
//                    action in
//                    print("他点击了确定")
//                    print("用户名:\(alertController.textFields!.first?.text) 密码:\(alertController.textFields!.last?.text)")
//                })
//
//        alertController.addAction(canceAction);
//        alertController.addAction(okAciton);
//        self.present(alertController,animated:true,completion: nil);

//提示框 设定时间消失

  let alertController = UIAlertController(title: "保存成功!",
                                                message: nil, preferredStyle: .alert)
        //显示提示框
        self.present(alertController, animated: true, completion: nil)
        //两秒钟后自动消失

        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now()+2) {
            self.presentedViewController?.dismiss(animated: false, completion: nil);
        }