ios - 在本地保存 NSURL 的 PDF - 检索

Question

你好，

我如何从 NSDictionary 本地检索 NSUrl 的 PDF。我这样保存:

NSData *pdfData = [[NSData alloc] initWithContentsOfURL:[
    NSURL URLWithString:@"http://www.example.com/info.pdf"]];

// Store the Data locally as PDF File
NSString *resourceDocPath = [[NSString alloc] initWithString:[
    [[[NSBundle mainBundle] resourcePath] stringByDeletingLastPathComponent]
        stringByAppendingPathComponent:@"Documents"
]];

NSString *filePath = [resourceDocPath 
    stringByAppendingPathComponent:@"myPDF.pdf"];
[pdfData writeToFile:filePath atomically:YES];


// Now create Request for the file that was saved in your documents folder
NSURL *url = [NSURL fileURLWithPath:filePath];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];

[webView setDelegate:self];
[webView loadRequest:requestObj];

但是我如何检索文件并将其显示在 UIWebView 中？？

干杯，SebOH

Answer 1

试试这个解决方案。下载文件后，您无需每次都下载。您可以访问存储文件的目录。

 // Store the Data locally as PDF File
        NSString *resourceDocPath = [[NSString alloc] initWithString:[
                                                                      [[NSBundle mainBundle] resourcePath]
                                                                      stringByAppendingPathComponent:@"Documents"
                                                                      ]];


        NSString *filePath = [resourceDocPath
                              stringByAppendingPathComponent:@"myPDF.pdf"];
        if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
        NSData *pdfData = [[NSData alloc] initWithContentsOfURL:[
                                                                 NSURL URLWithString:@"http://www.example.com/info.pdf"]];
        [pdfData writeToFile:filePath atomically:YES];
        }


        // Now create Request for the file that was saved in your documents folder
        NSURL *url = [NSURL fileURLWithPath:filePath];
        NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
        [webView setDelegate:self];
        [webView loadRequest:requestObj];