iphone - iOS AirPrint - 打印多个 URL

Question

根据这篇文章的问题: Unable to display printer options with AirPrint

我有几个问题:

1) 答案之一是将 Controller.printItem 设置为 URL。同样，我可以设置多个网址吗？基本上，我有一组需要一次打印的 URL。是否可以将 controller.printitems 设置为 URL 数组？另外，我知道 controller.printItem 采用“数据”类型，那么如何将基于 Web 的图像 URL 转换为“数据”类型？

2) 由于某些奇怪的原因，默认情况下，每次我到达打印对话框时，双面都设置为打开。我需要什么变量来关闭它？如果我可以不向用户显示该选项，那就太好了。

Answer 1

试试这个代码可能对你有帮助

- (IBAction)btnPrintTapped:(id)sender {
    NSData *imageData = UIImagePNGRepresentation(self.imgV.image);
    [self printItem:imageData];
}

#pragma mark - Printing 

-(void)printItem :(NSData*)data {
    printController = [UIPrintInteractionController sharedPrintController];
    if(printController && [UIPrintInteractionController canPrintData:data]) {
        printController.delegate = self;
        UIPrintInfo *printInfo = [UIPrintInfo printInfo];
        printInfo.outputType = UIPrintInfoOutputGeneral;
        printInfo.jobName = [NSString stringWithFormat:@""];
        printInfo.duplex = UIPrintInfoDuplexLongEdge;
        printController.printInfo = printInfo;
        printController.showsPageRange = YES;
        printController.printingItem = data;
        void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
            if (!completed && error) {
                //NSLog(@"FAILED! due to error in domain %@ with error code %u", error.domain, error.code);
            }
        };
        [printController presentFromBarButtonItem:self.item animated:YES completionHandler:completionHandler];
    }
}

- (BOOL)presentFromRect:(CGRect)rect inView:(UIView *)view animated:(BOOL)animated completionHandler:(UIPrintInteractionCompletionHandler)completion {
    return YES;
}

- (BOOL)presentFromBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated completionHandler:(UIPrintInteractionCompletionHandler)completion {
    return YES;
}