我正在使用以下代码来打印包含文本和图像的HTML内容.

if (![UIPrintInteractionController isPrintingAvailable]) {

UIAlertView *alertView = [[[UIAlertView alloc]

initWithTitle:NSLocalizedString(@"Printer Availability Error Title",@"")

message:NSLocalizedString(@"Printer Availability Error Message",@"")

delegate:nil

cancelButtonTitle:NSLocalizedString(@"OK",@"OK")

otherButtonTitles:nil] autorelease];

[alertView show];

return;

}

UIPrintInteractionController *pic =

[UIPrintInteractionController sharedPrintController];

if(!pic) {

NSLog(@"Couldn't get shared UIPrintInteractionController!");

return;

}

pic.delegate = self;

UIPrintInfo *printInfo = [UIPrintInfo printInfo];

printInfo.outputType = UIPrintInfoOutputGeneral;

printInfo.jobName = @"Sample";

pic.printInfo = printInfo;

NSString *htmlString = [self prepareHTMLText];

UIMarkupTextPrintFormatter *htmlFormatter =

[[UIMarkupTextPrintFormatter alloc] initWithMarkupText:htmlString];

htmlFormatter.startPage = 0;

// 1-inch margins on all sides

htmlFormatter.contentInsets = UIEdgeInsetsMake(72.0,72.0,72.0);

// printed content should be 6-inches wide within those margins

htmlFormatter.maximumContentWidth = 6 * 72.0;

pic.printFormatter = htmlFormatter;

[htmlFormatter 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);

}

};

if (UI_USER_INTERFACE_IdioM() == UIUserInterfaceIdiomPad) {

[pic presentFromBarButtonItem:self.myPrintBarButton

animated:YES

completionHandler:completionHandler];

} else {

[pic presentAnimated:YES completionHandler:completionHandler];

}

请参阅附件中的结果(按比例缩小的版本可能不是很清楚,但希望你能得到图片).

这是我的问题：

>打印纸尺寸如何由AirPrint确定？如果我想专门为A4纸格式化和打印数据怎么办？

>使用上述代码并使用不同的模拟打印机(打印机模拟器)打印的结果是,在所有情况下,我在第一页的顶部获得1英寸的边距,但在连续页面上没有.为什么？

>使用上述代码并使用不同的模拟打印机(打印机模拟器)进行打印的结果是,在某些情况下,字体样式会丢失.结果,内容向下移动.为什么？