How to retrieve the Xml file from Cachedirectory? - iphone

Question

Im new to Iphone development, I have locally saved one xml file and showing the details by using NSXmlParser(Which is stored in Resource folder). But, now i want to download new xml from url(from client side) and need to store that new xml file in Cache directory and also delete the xml file from resource folder. but i did not parse the new xml file from cache directory, How can i parse the new xml file from cache directory? Any one know this, please help me

Answer 1

I've actually just recently written this functionality for one of my projects. I'll share the code i used to do to save and write the XML file to my cache.
- (NSString *)XMLCacheFilePath
{
NSString *directory = #"/Library/Caches/XML/";
NSString *fileName = [#"file" stringByAppendingPathExtension:#"xml"];
// Setup directory path
NSString *homeDirectoryPath = NSHomeDirectory();
NSString *unexpandedDirectoryPath = [homeDirectoryPath stringByAppendingString:directory];
NSString *directoryPath = [NSString pathWithComponents:[NSArray arrayWithObjects:
[NSString stringWithString:[unexpandedDirectoryPath stringByExpandingTildeInPath]],
nil]];
// Setup file path
NSString *unexpandedFilePath = [directoryPath stringByAppendingPathComponent:fileName];
NSString *filePath = [NSString pathWithComponents:[NSArray arrayWithObjects:
[NSString stringWithString:[unexpandedFilePath stringByExpandingTildeInPath]],
nil]];
if (![[NSFileManager defaultManager] fileExistsAtPath:directoryPath isDirectory:nil]) {
NSError *error = [[NSError alloc] init];
[[NSFileManager defaultManager] createDirectoryAtPath:directoryPath
withIntermediateDirectories:YES
attributes:nil
error:&error];
}
return filePath;
}
- (void)saveXMLStringToDisk:(NSString *)xmlString
{
NSError *error;
[xmlString writeToFile:self.XMLCacheFilePath
atomically:YES
encoding:NSUTF8StringEncoding
error:&error];
}
- (NSString *)XMLStringFromDisk
{
NSString *XMLString = [NSString stringWithContentsOfFile:self.XMLCacheFilePath
encoding:NSUTF8StringEncoding
error:nil];
return XMLString;
}