Access wifi printer from iOS app in same network but different subnet

Question

In my project there is a print option where we print a simple pdf file with following code:

UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];

if  (pic && [UIPrintInteractionController canPrintData: self.myPDFData] ) {
    pic.delegate = self;
    UIPrintInfo *printInfo = [UIPrintInfo printInfo];
    printInfo.outputType = UIPrintInfoOutputGeneral;
    printInfo.jobName = @"PrintPdf";
    printInfo.duplex = UIPrintInfoDuplexLongEdge;
    pic.printInfo = printInfo;
    pic.showsPageRange = YES;
    pic.printingItem = self.myPDFData;     
    void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) =

    ^(UIPrintInteractionController *pic, BOOL completed, NSError *error) {
        if (!completed && error)
            NSLog(@"FAILED! due to error in domain %@ with error code %ld",
                  error.domain, (long)error.code);
    };
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        [pic presentFromRect:self.printButton.frame inView:self.view animated:YES completionHandler:^(UIPrintInteractionController *printInteractionController, BOOL completed, NSError *error) {
        }];
    } else {
        [pic presentAnimated:YES completionHandler:completionHandler];
    }
}

It works fine when I have tested it in the Printer Simulator. My requirement is that the printer may be on another subnet of the same wifi. How do I make this work?

Answer 1

无需更改代码UIPrintInteractionController中的任何内容，如果打印机将位于同一网络中，则UIPrintInteractionController可以发现它，并且可以从弹出窗口中选择打印机。