Save NSURL's PDF Locally - Retrieve - ios

Question

Hello,
How would I retrieve an NSUrl's PDF locally from a NSDictionary. I save it like so:
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];
But how would I retrieve the file and display it in a UIWebView??
Cheers,
SebOH

Answer 1

Try this solution. Once you downloaded the file you don't need to download every time. you can access the directory where the file has been stored.
// 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];

Answer 2

You are doing the exact thing, "retrieve the file and display it in a UIWebView??" using the below code
// 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];
Is there some problem you are facing with the above lines of code, is the PDF loading in the webview?
So if you don't want to download the file every time do this check,
if (![[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
//download the file
}
So the whole solution would be
// Store the Data locally as PDF File
NSString *resourceDocPath = [[NSString alloc] initWithString:[
[[[NSBundle mainBundle] resourcePath] stringByDeletingLastPathComponent]
stringByAppendingPathComponent:#"Documents"
]];
NSString *filePath = [resourceDocPath
stringByAppendingPathComponent:#"myPDF.pdf"];
if (![[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
//download the file
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];