1.封装 弹框

http://www.hangge.com/blog/cache/detail_651.html

 

import UIKit extension UIAlertController {    //在指定视图控制器上弹出普通消息提示框    static func showAlert(message: String, in viewController: UIViewController) {        let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)        alert.addAction(UIAlertAction(title: "确定", style: .cancel))        viewController.present(alert, animated: true)    }         //在根视图控制器上弹出普通消息提示框    static func showAlert(message: String) {        if let vc = UIApplication.shared.keyWindow?.rootViewController {            showAlert(message: message, in: vc)        }    }         //在指定视图控制器上弹出确认框    static func showConfirm(message: String, in viewController: UIViewController,                            confirm: ((UIAlertAction)->Void)?) {        let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)        alert.addAction(UIAlertAction(title: "取消", style: .cancel))        alert.addAction(UIAlertAction(title: "确定", style: .default, handler: confirm))        viewController.present(alert, animated: true)    }         //在根视图控制器上弹出确认框    static func showConfirm(message: String, confirm: ((UIAlertAction)->Void)?) {        if let vc = UIApplication.shared.keyWindow?.rootViewController {            showConfirm(message: message, in: vc, confirm: confirm)        }    }}

　　

 

 

2.改变 标题颜色，按钮颜色，等等

https://blog.csdn.net/mo_xiao_mo/article/details/70308099

 

 

let alert = UIAlertController(title: nil, message: "确定要退出登录吗？", preferredStyle: .actionSheet)                /// 确认        let sureAction = UIAlertAction(title: "确认", style: UIAlertAction.Style.default) { [weak self](_) in             self?.requestLoginOut()        }        sureAction.setValue(UIColor.init(hexString: "#FF9E3E"), forKey: "_titleTextColor")        alert.addAction(sureAction)                //取消操作        let cancleAction = UIAlertAction(title: "取 消", style: .cancel, handler: nil)        cancleAction.setValue(UIColor.init(hexString: "#424242"), forKey: "_titleTextColor")        alert.addAction(cancleAction)        self.present(alert, animated: true, completion: nil)