下面是这个类的一些功能：1.设置icon上的数字图标 //设置主界面icon上的数字图标，在2.0中引进， 缺省为0 [UIApplicationsharedApplication].applicationIconBadgeNumber = 4;2.设置摇动手势的时候，是否支持redo,undo操作 //摇动手势，是否支持redo undo操作。 //3.0以后引进，缺省YES
[UIApplicationsharedApplication].applicationSupportsShakeToEdit =YES;
3.判断程序运行状态 //判断程序运行状态，在2.0以后引入 /* UIApplicationStateActive, UIApplicationStateInactive, UIApplicationStateBackground */ if([UIApplicationsharedApplication].applicationState ==UIApplicationStateInactive){ NSLog(@"程序在运行状态"); }4.阻止屏幕变暗进入休眠状态 //阻止屏幕变暗，慎重使用,缺省为no 2.0 [UIApplicationsharedApplication].idleTimerDisabled =YES;（慎重使用本功能，因为非常耗电）5.显示联网状态 //显示联网标记 2.0 [UIApplicationsharedApplication].networkActivityIndicatorVisible =YES;
6.在map上显示一个地址 NSString* addressText =@"1 Infinite Loop, Cupertino, CA 95014"; // URL encode the spaces addressText = [addressTextstringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]; NSString* urlText = [NSStringstringWithFormat:@"?q=%@", addressText]; [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:urlText]];
7.发送电子邮件 NSString *recipients =@"mailto:first@example.com?cc=second@example.com,third@example.com&subject=Hello from California!"; NSString *body =@"&body=It is raining in sunny California!"; NSString *email = [NSStringstringWithFormat:@"%@%@", recipients, body]; email = [emailstringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:email]];8.打电话到一个号码 // Call Google 411 [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"tel://8004664411"]];
9.发送短信 // Text to Google SMS [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"sms://466453"]];
10.打开一个网址 // Lanuch any iPhone developers fav site [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@""]];
，当你困难失望的时候，最重要的是事瞧得起你自己；
