如何从iPhone中的文档目录中读取pdf文件

Question

目前我在iPhone应用程序中工作，我在资源文件夹（本地pdf文件）中有一个pdf文件，然后我成功阅读了该pdf文件（paper.pdf），下面我提到了阅读本地pdf文件供您参考。

例：

CFURLRef pdfURL = CFBundleCopyResourceURL(CFBundleGetMainBundle(), CFSTR("paper.pdf"), NULL, NULL);
pdf = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL);
CFRelease(pdfURL);

然后我尝试将pdf文件（来自URL）存储在NSDocument目录中，并成功存储。

NSData *pdfData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://www.msy.com.au/Parts/PARTS.pdf"]];
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
 NSString *documentsDirectory = [paths objectAtIndex:0]; 
 NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"myPDF11.pdf"];
 [pdfData writeToFile:filePath atomically:YES];

然后我尝试阅读那个pdf文件（来自NSDocument目录），但我不知道，请帮助我。

提前致谢

Answer 1

它非常简单，请使用以下代码将PDF从文档目录显示到Webview

从文档目录加载 PDF

 - (void)viewDidLoad
 {
[super viewDidLoad];
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 367)];
webView.scalesPageToFit = YES;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
 NSString *documentsDirectory = [paths objectAtIndex:0]; 
 NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"myPDF11.pdf"];
NSURL *targetURL = [NSURL fileURLWithPath:filePath];
NSURLRequest *request = [NSURLRequest requestWithURL:targetURL];
[webView loadRequest:request];
[self.view addSubview:webView];
[webView release];
 }

从应用程序捆绑包资源文件夹加载 PDF

 - (void)viewDidLoad
 {
[super viewDidLoad];
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 367)];
webView.scalesPageToFit = YES;
NSString *path = [[NSBundle mainBundle] pathForResource:@"myPDF11" ofType:@"pdf"];
NSURL *targetURL = [NSURL fileURLWithPath:path];
NSURLRequest *request = [NSURLRequest requestWithURL:targetURL];
[webView loadRequest:request];
[self.view addSubview:webView];
[webView release];
 }

Answer 2

尝试使用这个：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"myPDF11.pdf"];
NSURL *pdfUrl = [NSURL fileURLWithPath:filePath];
pdf = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL);
CFRelease(pdfURL);

从 NSURL 参考：

NSURL类与其核心基金会对应方CFURLRef免费衔接。有关免费桥接的更多信息，请参阅"免费桥接"。