openURL方法常用有
1：打开网页：
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://www.hao123.com"]]];
2:给XXX号码打电话：
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:[NSString stringWithFormat:@"tel:XXX"]]];
3:给XXX号码发信息：
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:[NSString stringWithFormat:@"sms:XXX"]]];
3：打开其他app：
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:[NSString stringWithFormat:@"taobao:参数"]]];
