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消息提醒中心

于 2022-03-23 发布 文件大小:169.67 kB
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消息提醒是常用功能,客户端在接收到消息之后需要消息中心提示用户的消息信息,而且一个程序只能有一个通知中心 程序实现了一个这样的消息中心,采用观察者设计模式,使用的addObserver方法注册一个通知中心领取通知。 每次调用此方法指定一组通知。 通知界面了类似Outlook邮件提醒的功能,从桌面右下角升起提醒窗口,非常漂亮

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