iOS:在文档应用程序中下载并保存 PDF 文件

Question

我想下载一个 PDF 文件，然后在 webView 中打开它。我搜索了一下然后找到了这个 issu .接受的答案描述了如何下载和显示文件。当我测试它时，我无法在文档中找到该文件，因为它存储在我的应用程序中。此外，我不认为该文件已保存，因为即使我传递要加载的文件路径，pdf 也永远不会显示在 webView 中。这是答案的代码:

// Get the PDF Data from the url in a NSData Object
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 setUserInteractionEnabled:YES];
[webView setDelegate:self];
[webView loadRequest:requestObj];

这是我在日志中看到的:

libMobileGestalt MobileGestaltSupport.m:153: pid 2828 (my_app) does not have sandbox access for frZQaeyWLUvLjeuEK43hmg and IS NOT appropriately entitled
2017-08-01 10:29:06.882562+0100 my_app[2828:1334057] libMobileGestalt MobileGestalt.c:550: no access to InverseDeviceID (see <rdar://problem/11744455>)

我做的有什么问题？我怎样才能将下载的文件放入我的 iPhone 的 Documents 应用程序中，以便用户像任何其他 PDF 一样随时进行检查？

Answer 1

沙箱路径错误

NSString *resourceDocPath = [[NSString alloc] initWithString:[
    [[[NSBundle mainBundle] resourcePath] stringByDeletingLastPathComponent]
        stringByAppendingPathComponent:@"Documents"
]];

请使用您的沙箱路径而不是包路径。

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);