AirPrint UIImage A4

Question

我的应用程序当前正在创建一个大小为2480 3508 (A4页面)的图像，如何在A4页面上将此图像发送到AirPrint？一旦创建了图像，它会将其保存到照片应用程序中，我还想将其发送到打印。有什么想法吗？谢谢

Answer 1

您将需要使用UIPrintInteractionController，并将图像设置为printingItem。根据您选择的打印质量(照片模式或标准)，默认纸张可能小于a4，但用户可以在打印对话框中选择a4。

`- (void) printImage: (UIImage *) myImage {
UIPrintInteractionController *controller = [UIPrintInteractionController  sharedPrintController];
    UIPrintInfo *printInfo = [UIPrintInfo printInfo];
    printInfo.outputType = UIPrintInfoOutputPhoto;
    printInfo.jobName = @"Testprint";
    printInfo.duplex = UIPrintInfoDuplexNone;
    controller.printingItem = myImage;
    controller.showsPaperSelectionForLoadedPapers = YES;

   void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) =
    ^(UIPrintInteractionController *pic, BOOL completed, NSError *error) {
    if (!completed && error)
        NSLog(@"FAILED! due to error in domain %@ with error code %u",
              error.domain, error.code);
       NSLog(@"Completed: %s", (completed?"YES":"NO"));
    };
  [controller presentAnimated:YES completionHandler:completionHandler];
}`

Answer 2

SWIFT 3版本

func printNow(_ image: UIImage){
    let controller = UIPrintInteractionController.shared
        let printInfo = UIPrintInfo.printInfo()
        printInfo.outputType = .photoGrayscale//.photo
        printInfo.jobName = "Testprint";
        printInfo.duplex = .none
        controller.printingItem = image
        controller.showsPaperSelectionForLoadedPapers = false

        controller.present(animated: true) { (controller, completed, error) in
            if (!completed && (error != nil)) {
                print("FAILED! due to error \(error.debugDescription)")
            }
            print("Completed: \(completed)")
    }
}