iOS：下载并保存文档中的PDF文件app

Question

我想下载PDF文件，然后在webView中打开它。我搜索了一下，然后我发现这个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，我不认为该文件被保存，因为即使通过要加载的文件路径，PDF也不会显示在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]; 

而且这是我在日志中看到：

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>) 

什么是我做了什么问题？我怎样才能将下载的文件放在我的iPhone的Documents应用程序中，以便在用户希望像任何其他PDF一样时进行检查？

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);