xcode DiskImageCache：无法解析旧目录的绝对路径。未能找到 PDF 标题：未找到“%PDF”
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DiskImageCache: Could not resolve the absolute path of the old directory. failed to find PDF header: `%PDF' not found
提问by Stephan K?nig
In one of my views, I simply want to show a pdf file in a UIWebView.
在我的一个视图中，我只想在 UIWebView 中显示一个 pdf 文件。
My code of the header file:
我的头文件代码：
#import <UIKit/UIKit.h>
@interface FCOMViewController : UIViewController
{IBOutlet UIWebView *fcomWebView;}
//flag to denote if this is first time the app is run
@property (nonatomic) BOOL firstRun;
@end
And here the method in the implementation file:
这里是实现文件中的方法：
- (void)viewDidLoad {
//Show the procedures PDF
NSString *path = [[NSBundle mainBundle] pathForResource:@"b777normalprocedures" ofType:@"pdf"];
NSURL *url = [NSURL fileURLWithPath:path];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[fcomWebView loadRequest:request];
[fcomWebView setScalesPageToFit:YES];
The app starts fine, does not crash or anything. The referencing outlets are set, but it doesn't show the PDF. Console says:
该应用程序启动良好，没有崩溃或任何事情。参考出口已设置，但不显示 PDF。控制台说：
DiskImageCache: Could not resolve the absolute path of the old directory. failed to find PDF header: `%PDF' not found.
DiskImageCache：无法解析旧目录的绝对路径。未能找到 PDF 标题：未找到“%PDF”。
The pdf is in the project directory, I have double checked that it is written correctly.
pdf 在项目目录中，我已经仔细检查过它是否正确写入。
What can I do here? Any help would be appreciated.
我可以在这里做什么？任何帮助，将不胜感激。
回答by Xavier
Try this if you are targeting iOS 8.0:
如果你的目标是 iOS 8.0，试试这个：
NSString *path = [[NSBundle mainBundle] pathForResource:@"b777normalprocedures" ofType:@"pdf"];
NSURL *targetURL = [NSURL fileURLWithPath:path];
NSData *pdfData = [[NSData alloc] initWithContentsOfURL:targetURL];
[_webView loadData:pdfData MIMEType:@"application/pdf" textEncodingName:@"utf-8" baseURL:nil];
回答by Theis Egeberg
For me the problem was with downloaded pdf files which had extensions that I presume was otherwise recognised by UIWebView (aspx,php etc.). When I renamed the downloaded pdf files so that they had a ".pdf" extension the error did not occur.
对我来说，问题在于下载的 pdf 文件具有扩展名，我认为 UIWebView（aspx、php 等）以其他方式识别了这些扩展名。当我重命名下载的 pdf 文件以便它们具有“.pdf”扩展名时，没有发生错误。
