如何将 xml 数据写入 iphone 中的 plist 文件？

Question

如何将 xml 数据写入 iphone 中的 plist 文件？我正在使用这个代码 ` 我使用这个代码
-(void)connectionDidFinishLoading:(NSURLConnection *)连接 {

NSString *thexml=[[NSString alloc] initWithBytes:[webdata mutableBytes] length:[webdata length] encoding:NSASCIIStringEncoding];
  NSArray *paths = NSSearchPathForDirectoriesInDomains

(NSDocumentDirectory, NSUserDomainMask, YES);


NSString *documentsDirectory = [paths objectAtIndex:0];

//make a file name to write the data to using the documents directory:

// NSString *path = [[NSBundle mainBundle] pathForResource:@"mySettings" ofType:@"plist"]; NSString *fileName = [NSString stringWithFormat:@"%@/textfile.plist",

                      documentsDirectory];

//create content - four lines of text

//NSString *content = @"One\nTwo\nThree\nFour\nFive";
NSString *content =thexml;
NSLog(@"%@",thexml);
//save content to the documents directory

[content writeToFile:fileName 

          atomically:YES 

            encoding:NSStringEncodingConversionAllowLossy 

               error:nil];

[self writePlist:1 fileName:thexml]; [xml发布]； [连接释放];`

但我看到显示文件的 plist 文件是一个curuupted 。？请给我一个解决方案...... 提前致谢