iphone 拨打电话的API

今天在网上看到这个，先留着

+ (void) makeCall:(NSString *)phoneNumber
{    
    NSURL *phoneNumberURL = [NSURL URLWithString:[NSString stringWithFormat:@"tel:%@", phoneNumber]];
    NSLog(@"make call, URL=%@", phoneNumberURL);
    
    [[UIApplication sharedApplication] openURL:phoneNumberURL];    
}