//iOS 9.0 之前的处理方法不保证正确,如有错误还望指正
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
  if ([url.host isEqualToString:@"safepay"])
  {
    [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:nil];
    return YES;
  }
  return YES;
}

-(BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options {
  if ([url.host isEqualToString:@"safepay"])
  {
    [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:nil];
    return YES;
  }
  return YES;
}