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？
解决方法
>为了专门选择A4纸张尺寸,我实现了printInteractionController：selectPaper：< UIPrintInteractionControllerDelegate>的方法.如果打印机支持,则返回A4纸张大小(使用[UIPrintPaper bestPaperForPageSize：withPapersFromArray：]进行测试.请注意,此处未设置纵向/横向,而是通过UIPrintInfo属性方向设置.
>属性htmlFormatter.contentInsets仅在页面渲染器跨页面拆分之前设置整个内容的插入.通过UIPrintPageRenderer添加空白页眉和页脚,然后在HTML打印格式化程序的左侧和右侧添加1cm边距,我能够设置每页1cm的页边距：
>属性htmlFormatter.contentInsets仅在页面渲染器跨页面拆分之前设置整个内容的插入.通过UIPrintPageRenderer添加空白页眉和页脚,然后在HTML打印格式化程序的左侧和右侧添加1cm边距,我能够设置每页1cm的页边距：
UIPrintPageRenderer *renderer = [[UIPrintPageRenderer alloc] init]; renderer.headerHeight = 30.0f; renderer.footerHeight = 30.0f; pic.printPageRenderer = renderer; [renderer release]; UIMarkupTextPrintFormatter *htmlFormatter = [[UIMarkupTextPrintFormatter alloc] initWithMarkupText: htmlString]; htmlFormatter.startPage = 0; htmlFormatter.contentInsets = UIEdgeInsetsMake(0.0f,30.0f,0.0f,30.0f); [renderer addPrintFormatter: htmlFormatter startingAtPageAtIndex: 0]; [htmlFormatter release];
>对不起这个抱歉.
