- (BOOL)openURL:(NSURL*)url;
UIApplication *app = [UIApplication sharedApplication];
[app openURL:[NSURL URLWithString:@"tel://10086"]];
[app openURL:[NSURL URLWithString:@"sms://10086"]];
[app openURL:[NSURL URLWithString:@"mailto://12345@qq.com"]];
[app openURL:[NSURL URLWithString:@"http://ios.itcast.cn"]];
原文：http://www.cnblogs.com/ZippoatiOS/p/3763980.html