UIApplicaiton常用功能

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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;

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判断程序运行状态

? ?if([UIApplicationsharedApplication].applicationState ==UIApplicationStateInactive){

? ? ? ? NSLog(@"程序在运行状态");

? ? }

阻止屏幕变暗进入休眠状态

? ? [UIApplicationsharedApplication].idleTimerDisabled =YES;

（慎重使用本功能，因为非常耗电）

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:@"http://maps.google.com/maps?q=%@", addressText];

? ? [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:urlText]];

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]];

打电话到一个号码

? ? // Call Google 411

? ? [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"tel://8004664411"]];

发送短信

? ? // Text to Google SMS

? ? [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"sms://466453"]];

打开一个网址

? ?// Lanuch any iPhone developers fav site

? ? [[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"http://itunesconnect.apple.com"]];