UIApplication

邮件
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto://devprograms@apple.com"]];
电话
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://8004664411"]];
sms
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://466453"]];
浏览器
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://itunesconnect.apple.com"]];