gistfile1.m

- (void)choosePaymentInstrument:(BBPaymentInstrument*)instrument {
  NSAssert(instrument.paymentInstrumentId, @"instrument must have an ID");
  NSString *endpoint = [NSString stringWithFormat:@"/trip_invoices/%d",(int)self.tripInvoice.tripInvoiceId.integerValue];
  NSDictionary *params = @{@"op":@"add",@"path":@"/payment_instrument_id",@"value":instrument.paymentInstrumentId};
  [self showLoadingView:NO blocking:NO];
  [[BBAPI V2] patch:endpoint withParams:params onSuccess:^(id object) {
    [self dismissLoadingView];
    [self.tableView triggerPullToRefresh];
  } onFailure:^(NSError *e) {
    [[BBAlertManager sharedManager] showAlertWithError:e];
    [self dismissLoadingView];
  }];
}