Question

I want to save data to xml file , which include

• Create xml file
• insert in it
• delete from it
• update certain node
• read all the elements

any suggestion please , any sample tutorial code will be highly appreciated

Answer 1

NSURL *url = [NSURL URLWithString:@"http://abcd.com/sample.xml"];
NSData *data = [NSData dataWithContentsOfURL:url];  // Load XML data from web

// construct path within our documents directory
NSString *applicationDocumentsDir = 
   [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *storePath = [applicationDocumentsDir stringByAppendingPathComponent:@"sample.xml"];

// write to file atomically (using temp file)
[data writeToFile:storePath atomically:TRUE];

If you are parsing the XML into an NSArray or NSDictionary, it is better to just save the array or dictionary so that you don’t have to parse the data in the cache every time you want to read it. Both NSArray and NSDictionary have the methods writeToFile and initWithContentsOfFile