AirPrint的Objective-C代码

Question

如何在objective-c中用IBAction方法用AirPrint打印UITextView？

Answer 1

检查是否可以打印：

if ([UIPrintInteractionController isPrintingAvailable])
{
    // Available
} else {
    // Not Available
}

单击按钮后打印：

-(IBAction) buttonClicked: (id) sender;
{
    NSMutableString *printBody = [NSMutableString stringWithFormat:@"%@, %@",self.encoded.text, self.decoded.text];
    [printBody appendFormat:@"\n\n\n\nPrinted From *myapp*"];

     UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
     pic.delegate = self;

     UIPrintInfo *printInfo = [UIPrintInfo printInfo];
     printInfo.outputType = UIPrintInfoOutputGeneral;
     printInfo.jobName = self.titleLabel.text;
     pic.printInfo = printInfo;

     UISimpleTextPrintFormatter *textFormatter = [[UISimpleTextPrintFormatter alloc] initWithText:printBody];
     textFormatter.startPage = 0;
     textFormatter.contentInsets = UIEdgeInsetsMake(72.0, 72.0, 72.0, 72.0); // 1 inch margins
     textFormatter.maximumContentWidth = 6 * 72.0;
     pic.printFormatter = textFormatter;
     [textFormatter release];
     pic.showsPageRange = YES;

     void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) =
     ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
     if (!completed && error) {
     NSLog(@"Printing could not complete because of error: %@", error);
     }
     };

    [pic presentFromBarButtonItem:self.rightButton animated:YES completionHandler:completionHandler];

}

最初由'87vert‘在iPhone Dev SDK上发布：Airprint Tutorial - Simple Print File

Answer 2

下面的方法使用要打印的文件的名称以及您希望显示airprint弹出窗口的条形钮代码。它对我很有效，我相信它会对我有所帮助。

-(void)printJob:(int)jobType:(NSString*)jobName:(UIBarButtonItem *)barButton{

NSString *path;
if ([jobName isEqualToString:@"Printout.png"]) {
    path= [self documentsPathForFileName:@"Printout.png"];
}

NSData *mydata=[NSData dataWithContentsOfFile:path];
UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];
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 *printController, BOOL completed, NSError *error) {
    if (!completed && error) {
        NSLog(@"Printing could not complete because of error: %@", error);
    }
};

[pic presentFromBarButtonItem:barButton animated:YES completionHandler:completionHandler];

}