创建Webview以进行打印时出现问题 [英] Problems creating a Webview for printing
本文介绍了创建Webview以进行打印时出现问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图使用Webview在使用Core Plot框架生成的图形周围添加一些文本以进行打印。我有以下代码，大部分似乎工作，但它不显示图像，但问号图像丢失的图像。任何人都可能指向正确的方向为什么问题可能是：
I'm trying to use a Webview to add some text around a graph produced using the Core Plot framework for printing. I have the following code which for the most part seems to work, however it is not displaying an image but the question mark image for a missing image. Can anyone point me in the right direction for what the problem might be:
NSData *imageData = [[barChart imageOfLayer] TIFFRepresentation];
NSString *temporaryImagePath = NSTemporaryDirectory();
NSError *error = nil;
NSBitmapImageRep* imageRep = [NSBitmapImageRep imageRepWithData:imageData];
NSData* pngData;
pngData = [imageRep representationUsingType:NSPNGFileType
properties:nil];
temporaryImagePath = [temporaryImagePath stringByAppendingPathComponent:@"pngData.png" ];
[pngData writeToFile:temporaryImagePath
options:NSDataWritingAtomic
error:&error ];
WebView *printView;
printView =[[WebView alloc] initWithFrame:NSMakeRect(0, 0, 300, 500)
frameName:@"printFrame"
groupName:@"printGroup"];
NSMutableString *theURLString = [[NSMutableString alloc] initWithString:@"<html>"];
[theURLString appendString:@"<head>"];
[theURLString appendString:@"</head>"];
[theURLString appendString:@"<body>"];
[theURLString appendString:[NSString stringWithFormat:@"<img src=\"%@\" alt=\"Histogram\"/>", temporaryImagePath]];
[theURLString appendString:@"</body></html>"];
[[printView mainFrame] loadHTMLString:theURLString
baseURL:[NSURL URLWithString:@"a URL"]];
[[[[printView mainFrame] frameView] documentView] print:sender];
[printView release];
推荐答案
您使用常规路径作为源该图像，这是无效的HTML。您应该使用file：// URL，例如：
You're using a regular path as the source of the image, which isn't valid HTML. You should use a file:// URL, like this:
//...
NSURL *tempImageURL = [NSURL fileURLWithPath:temporaryImagePath];
[theURLString appendFormat:@"<img src=\"%@\"/>", [tempImageURL absoluteString]];
//...
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