【IOS开发】创建XML文件

- (void)viewDidLoad
{
    [super viewDidLoad];


    NSString *path = [[NSBundle mainBundle] pathForResource:@"items" ofType:@"plist"];
    NSDictionary *wed3dDic = [NSDictionary dictionaryWithContentsOfFile:path];
    NSArray *wed3dArr = [wed3dDic valueForKey:@"wed3d"];

    NSMutableString *xmlString = [NSMutableString stringWithString:@"<?xml version="1.0" encoding="UTF-8"?>"];
    [xmlString appendString:@"<wed3d>"];
    NSLog(@"%@",xmlString);
    
    for (int i =0; i < [wed3dArr count]; i++) {
        NSDictionary *dic = [wed3dArr objectAtIndex:i];

        NSString *contentName = [dic valueForKey:@"contentname"];
        if ([contentName isEqualToString:@"scene"]) {
            NSString *l      = [dic valueForKey:@"l"];
            NSString *w      = [dic valueForKey:@"w"];
            NSString *h      = [dic valueForKey:@"h"];
            [xmlString appendFormat:@"<%@ 1="%@" w="%@" h="%@" />",contentName,l,w,h];
        }else if ([contentName isEqualToString:@"objects"]){
            [xmlString appendFormat:@"<%@>",contentName];
            NSArray *itemArr = [dic valueForKey:@"items"];
            for (int j = 0; j<[itemArr count]; j++) {
                NSDictionary *itemDic = [itemArr objectAtIndex:j];
                NSString *itemName = [itemDic valueForKey:@"itemname"];
                NSString *x        = [itemDic valueForKey:@"x"];
                NSString *z        = [itemDic valueForKey:@"z"];
                [xmlString appendFormat:@"<item name="%@" x="%@" z="%@" />",itemName,x,z];
            }
            [xmlString appendFormat:@"</%@>",contentName];
        }else if ([contentName isEqualToString:@"colors"]||[contentName isEqualToString:@"lights"]){
            [xmlString appendFormat:@"<%@>",contentName];
            NSArray *itemArr = [dic valueForKey:@"items"];
            for (int j = 0; j<[itemArr count]; j++) {
                NSDictionary *itemDic = [itemArr objectAtIndex:j];
                NSString *itemName = [itemDic valueForKey:@"itemname"];
                NSString *r        = [itemDic valueForKey:@"r"];
                NSString *g        = [itemDic valueForKey:@"g"];
                NSString *b        = [itemDic valueForKey:@"b"];
                NSString *a        = [itemDic valueForKey:@"a"];
                [xmlString appendFormat:@"<item name="%@" r="%@" g="%@" b="%@" a="%@" />",itemName,r,g,b,a];
            }
            [xmlString appendFormat:@"</%@>",contentName];
        }else
        {
            NSString *l      = [dic valueForKey:@"l"];
            NSString *w      = [dic valueForKey:@"w"];
            NSString *h      = [dic valueForKey:@"h"];
            [xmlString appendFormat:@"<%@ 1="%@" w="%@" h="%@" >",contentName,l,w,h];
            NSArray *itemArr = [dic valueForKey:@"items"];
            for (int j = 0; j<[itemArr count]; j++) {
                NSDictionary *itemDic = [itemArr objectAtIndex:j];
                NSString *itemName = [itemDic valueForKey:@"itemname"];
                NSString *x        = [itemDic valueForKey:@"x"];
                NSString *z        = [itemDic valueForKey:@"z"];
                [xmlString appendFormat:@"<item name="%@" x="%@" z="%@" />",itemName,x,z];
            }
            [xmlString appendFormat:@"</%@>",contentName];
        }
    }
    [xmlString appendString:@"</wed3d>"];

    NSError *error;
    [xmlString writeToFile:[self dataFilePath:YES] atomically:YES encoding:NSUTF8StringEncoding error:&error];
    NSLog(@"%@",wed3dDic);

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}


- (NSString *)dataFilePath:(BOOL)forSave {
    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                         NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *documentsPath = [documentsDirectory
                               stringByAppendingPathComponent:@"xml"];
    if (forSave ||
        [[NSFileManager defaultManager] fileExistsAtPath:documentsPath]) {
        return documentsPath;
    } else {
        return [[NSBundle mainBundle] pathForResource:@"xml" ofType:@"xml"];
    }
    
}