摘要：
BarsThe Status BarThe UIStatusBarStyle constant, controls the status bar style.To specify the status bar style, you set a value in your Info.plist file. (For more information about thecontents of this file, see “UIKit Keys”; to learn how to set values, see Property List Editor Help .)一般不建议自定义状态栏,主要考 阅读全文
摘要：
apps can use local or push notifications to let people know when interesting things happen, such as:iOS Technology Usage GuidelinesNotification Center2013-05-01 | © 2013 Apple Inc. All Rights Reserved.95● A message has arrived● An event is about to occur● New data is available for download● The 阅读全文