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POhow to update node values and add nodes in xml file?
 

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  1. POhow to update node values and add nodes in xml file?
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    <p>i am new iphone developer,in my application i can read data from xml code to read xml:: -(NSString *)readxmlFile:(NSString *)fileName ElementName:(NSString *)Element Poisson:(NSInteger *)Index { xmlelement = Element; NSString *filePath = [[NSBundle mainBundle] pathForResource:fileName ofType:@"xml"]; </p> <pre><code>NSData *myData = [NSData dataWithContentsOfFile:filePath]; NSString *str,*docStr; if (myData) { str = [[NSString alloc] initWithData:myData encoding:NSASCIIStringEncoding]; } NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; // the path to write file NSString *appFile = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.xml",fileName]]; NSError *error = nil; BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:appFile]; NSData *myData1 = [NSData dataWithContentsOfFile:appFile]; if(fileExists) { NSLog(@"file exist in document"); if (myData1) { docStr = [[NSString alloc] initWithData:myData1 encoding:NSASCIIStringEncoding]; xmlparser=[[NSXMLParser alloc] initWithData: myData1]; [xmlparser setDelegate:self]; [xmlparser parse]; NSLog(@"Data&gt;&gt;%@",xmlData); } } else { NSLog(@"file does not exist"); xmlparser=[[NSXMLParser alloc] initWithData: myData1]; [xmlparser setDelegate:self]; [xmlparser parse]; NSLog(@"Data&gt;&gt;%@",xmlData); BOOL success = [str writeToFile:appFile atomically:YES encoding:NSUTF8StringEncoding error:&amp;error]; if (!success) { NSLog(@"Error: %@", [error userInfo]); } else { NSLog(@"File write is successful"); } NSData *myData1 = [NSData dataWithContentsOfFile:appFile]; if (myData1) { docStr = [[NSString alloc] initWithData:myData1 encoding:NSASCIIStringEncoding]; } } return [xmlData objectAtIndex:Index];//pasre data from xml based on node name and save in xmlData </code></pre> <p>} but unable to write xml(add nodes and update node values) ,please guide to me how to add nodes and update node values in xml file. Thanks in advance</p>
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