I am building an iPhone app in which I want to time user activity. However, I don't want to count time when the iPhone was locked (or when the user received a phone ca开发者_Python百科ll) when calculating the times. What is the best way to do this? Is there a UIEvent which my app can receive (and act upon) when the iPhone locks or unlocks?
Look at the UIApplicationDelegate methods applicationWillResignActive: and applicationDidBecomeActive:.
海信ULED电视画质有什么不同的地方?樊倩竹 1天前 来自北京海信ULED电视按照我的理解，就是不同的面板技术，一般来说，ULED有背光，可以实现分区背光；QLED有背光，属于背光灯上覆盖量子膜；OLED无背光，属于自
钉子可以挂的住画框幕布吗360U3082033870 1天前 来自湖北可以。1、厚重的画框幕布挂在墙上的话，你可以给他钉一台钉子，这样的话他可以挂在后面的墙上，相对来说也是比较结实的。2、所以钉子可以挂的住画框幕
哪里医院专治输卵管堵塞好 补充说明：哪里医院专治输卵管堵塞好绿绿的藤草阁
外语基础薄弱的人出国自由行，带哪种翻译器比较好？
输卵管积液手术价格 补充说明：输卵管积液手术价格听不见的幸福 15小时前 假如是一个输卵管积水。这种通常状况上去说，是炎症造成出现这种状况的。我个人提议您首先要去医院门诊静脉点滴一到两周的抗生素选择医
103010正在紧张有序的拍摄中，恰逢演员王昌瑞的生日。现场工作人员为他庆生，主演也送上祝福。
It seems to me Apple won\'t allow this, but I need to make sure. For an app we\'re building, we want to ask the user to enter payment information (including credit card details) to pay for tickets. T
I need to generate an XML output using Perl code.I\'m trying not to use any libraries,as it\'s very simple, temporary XML that gets used by another step in the process.
是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
微信重新建群怎么开发者_Go百科建？ 产品名称：苹果手机 产品型号：iPhone 11 系统版本：iOS 13
加载中,请稍侯......
精彩评论