ios - 通过 Xcode 在 App 中打开打印对话框？

Question

我对 iOS 编程非常陌生，遇到了一个问题。我有一个 pdf 我想从互联网上打印出来。我如何在没有第三方应用程序的情况下通过我的应用程序打印这个？另外，我听说过苹果的 AirPrint，它预装在 iOS 设备上。我将如何使用它？谢谢。

Answer 1

.H 文件代码

 #import
    @interface xyviewController : UIViewController <...,UIPrintInteractionControllerDelegate> {

    UIPrintInteractionControllerDelegate should be delegate
    }
    -(IBAction)printdoc;

.M 文件代码

-(IBAction)printdoc
{



NSString *path = [[NSBundle mainBundle] pathForResource:@"demo" ofType:@"jpg"];
NSData *myData = [NSData dataWithContentsOfFile: path];


UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];

if(pic && [UIPrintInteractionController canPrintData: myData] ) {

pic.delegate = self;

UIPrintInfo *printInfo = [UIPrintInfo printInfo];
printInfo.outputType = UIPrintInfoOutputGeneral;
printInfo.jobName = [path lastPathComponent];
printInfo.duplex = UIPrintInfoDuplexLongEdge;
pic.printInfo = printInfo;
pic.showsPageRange = YES;
pic.printingItem = myData;

void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *pic, BOOL completed, NSError *error) {
//self.content = nil;
if (!completed && error) {
NSLog(@"FAILED! due to error in domain %@ with error code %u", error.domain, error.code);
}
};

[pic presentAnimated:YES completionHandler:completionHandler];

}

}