int badgeCount = [UIApplication sharedApplication].applicationIconBadgeNumber;
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];
[[UIApplication sharedApplication] cancelAllLocalNotifications];
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:badgeCount]
怎么使ios上方通知栏清空本应用的所有通知消息？,布布扣,bubuko.com
原文：http://www.cnblogs.com/MaggieNi/p/3627703.html