如何使用printToPrinter以编程方式进行串行打印

Question

我想逐个编程地打印记录。下一次打印应该等待完成上一次打印。这是代码，

更新了代码：

-(void)GetOrdersHanlder:(id)object
{
        NSArray *ordersArray = (NSArray *)object;

        for (int i = 0; i < ordersArray.count;i++) {
            ITsOrder *orderObject = [ordersArray objectAtIndex:i];
            [ordersMutableArray addObject:orderObject];
        }

        if (ordersMutableArray.count > 0) {
            [self printOrder:[self getHtmlPrintStringForOrderObject:[ordersMutableArray objectAtIndex:0]] orderObject:[ordersMutableArray objectAtIndex:0]];
        }
}

-(void)printOrder:(NSString*)htmlPrintString orderObject:(ITsOrder*)orderObject{

    //    dispatch_async(dispatch_get_main_queue(), ^{

    printInteractionController = [UIPrintInteractionController sharedPrintController];
    printInteractionController.delegate = self;
    printInteractionController.showsPageRange = YES;

    UIPrintInfo *printInfo = [UIPrintInfo printInfo];
    printInfo.outputType = UIPrintInfoOutputGeneral;
    printInfo.jobName = @"InvoicePrint";
    printInteractionController.printInfo = printInfo;

    htmlFormatter = [[UIMarkupTextPrintFormatter alloc]
                     initWithMarkupText:htmlPrintString];
    htmlFormatter.startPage = 0;
    printInteractionController.printFormatter = htmlFormatter;

    [logsMutableString appendFormat:@"\n\nPrint Started: Order No #%d",orderObject.order_no];
    logsTextView.text = logsMutableString;

    [printInteractionController printToPrinter:savedPrinter
                             completionHandler:^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
                                 if(!completed && error){
                                     NSLog( @"Printing failed due to error in domain %@ with error code %lu. Localized description: %@, and failure reason: %@", error.domain, (long)error.code, error.localizedDescription, error.localizedFailureReason );

                                     [logsMutableString appendFormat:@"\nPrint Failed: Order No #%d",orderObject.order_no];
                                     logsTextView.text = logsMutableString;
                                 }else{
                                     [logsMutableString appendFormat:@"\nPrint Successful: Order No #%d",orderObject.order_no];
                                     logsTextView.text = logsMutableString;
                                 }

                                 [ordersMutableArray removeObjectAtIndex:0];

                                 if (ordersMutableArray.count > 0 ) {
                                     [self printOrder:[self getHtmlPrintStringForOrderObject:[ordersMutableArray objectAtIndex:0]] orderObject:[ordersMutableArray objectAtIndex:0]];
                                 }

                             }];

    //    });
}

-

我更新了代码，调用了[self printOrder：[self getHtmlPrintStringForOrderObject：[ordersMutableArray objectAtIndex：0]] orderObject：[ordersMutableArray objectAtIndex：0]];，在完成处理程序中但获得了以下输出，

Print Started: Order No #114
Print Successful: Order No #114

Print Started: Order No #116

数组中有4个对象。但看起来，printToPrinter下次没有执行。