iOS 无线打印功能（AirPrint）

1.获取UIPrintInteractionController 

2.设置Print Info  

3.设置printingItem 

4.设置打印回调 

5.弹出UIPrintInteractionController 

AirPrint打印简单实现主要代码：

-(void)printDocument

{

   NSString*path = [[NSBundlemainBundle]pathForResource:@"CSL_Icon"ofType:@"jpg"];

   if(path ==nil)

    {

        [selfshowAlertView:@"No Data"withMessage:nil];

       return;

    }

   NSData*myData = [NSDatadataWithContentsOfFile: path];

   UIPrintInteractionController*pic = [UIPrintInteractionControllersharedPrintController];

   if(pic && [UIPrintInteractionControllercanPrintData: myData] ) {

        pic.delegate=self;

       UIPrintInfo*printInfo = [UIPrintInfoprintInfo];

        printInfo.outputType=UIPrintInfoOutputGeneral;

        printInfo.jobName= [pathlastPathComponent];

        printInfo.duplex=UIPrintInfoDuplexLongEdge;

        pic.printInfo= printInfo;

        pic.showsPageRange=YES;

        pic.printingItem= myData;

       void(^completionHandler)(UIPrintInteractionController*,BOOL,NSError*) = ^(UIPrintInteractionController*pic,BOOLcompleted,NSError*error) {

           //self.content = nil;

           if(completed)

            {

                [selfshowAlertView:@"Success"withMessage:nil];

            }

           elseif(!completed && error)

            {

                [selfshowAlertView:@"Faile"withMessage:@"Please, try agian!"];

//                NSLog(@"FAILED! due to error in domain %@ with error code %u", error.domain, error.code);

            }

        };

        [picpresentAnimated:YEScompletionHandler:completionHandler];

    }

}