airprint相关

UIGraphicsBeginImageContextWithOpti*****(self.view.bounds.size, YES, 0.0); //[self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *uiImage = UIGraphicsGetImageFromCurrentImageContext(); //NSString *path = [[NSBundle mainBundle] pathForResource:@"icon" ofType:@"png"]; //NSData *data = [NSData dataWithContentsOfFile: path]; NSData *imageData=UIImagePNGRepresentation(uiImage); UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController]; if (pic && [UIPrintInteractionController canPrintData: imageData] ) { pic.delegate = self; UIPrintInfo *printInfo = [UIPrintInfo printInfo]; printInfo.outputType = UIPrintInfoOutputGeneral; printInfo.jobName = @"abc"; printInfo.duplex = UIPrintInfoDuplexLongEdge; pic.printInfo = printInfo; pic.showsPageRange = YES; pic.printingItem = imageData; 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); }; if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { [pic presentFromRect:CGRectMake(670,145,0,0) inView:self.view animated:YES completionHandler:completionHandler]; } else { [pic presentAnimated:YES completionHandler:completionHandler]; } } UIGraphicsEndImageContext();

好了，我的思路基本上就是这样了，先把当前屏幕截屏，然后再转为NSData数据，再通过UIPrintInteractionController来打印。

我是第一次弄这种东西啊，起码能找到打印机并且打印我已经很开心了。

（以上内容，可能不正确）

在自己的应用里加入AirPrint(苹果无线打印)功能   

【版主招募】2012年度CocoaChina版主招募火热进行中！

    NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"jpg"];
    NSData *data = [NSData dataWithContentsOfFile: path];
    
    UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
        
    if  (pic && [UIPrintInteractionController canPrintData: data] ) {
        
        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 = data;
        
        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);
        };
        if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
            [pic presentFromBarButtonItem:self.printButton animated:YES completionHandler:completionHandler];
        } else {
            [pic presentAnimated:YES completionHandler:completionHandler];
        }
    }

碰到个问题 怎么才能打印txt格式文件？能给个思路么
NSString *path = [[NSBundle mainBundle] pathForResource:@"test33" ofType:@"txt"];
 NSData *data = [NSData dataWithContentsOfFile: path];
UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
NSLog(@"canPrintData = %d", [UIPrintInteractionController canPrintData: data]);
 nslog输出的缺是no！data里面有东西的啊。。。难道要用 canPrintURL？