How to read and write file plist cocos2dx?

cocos2d-x C++
#1

I’m coding ios game with cocos2d-x. i want to save data game on file plist . how to do that?

Thank you

#2

Wind Runner wrote:

I’m coding ios game with cocos2d-x. i want to save data game on file plist . how to do that?
>
Thank you

If you want to read/write custom plists only on iOS, you can use NSPropertyListSerialization and perform convertion between cocos2dx and NS objects. You can use CCDictionary::createWithContentsOfFile() to read plist from resources; but this method works incorrectly with <, >, & and other escaped symbols.

#3

you can write detailed for your idea :(. If you can, please post code to this post. Thank you

#4

I mean that you can write function that recursively visits nested NSObjects and constructs CCDictionary/CCArray by copying

// string() constructs new CCString
// dictionary() iterates NSDictionary keys and calls objc2cocos for each object,
//              resulting CCObject * will be added to CCDictionary
// array() iterates NSArray, converts each objects with objc2cocos and adds
           resulting CCObject * to CCArray *
CCObject *objc2cocos(id value)
{
    if ([id isKindOfClass:[NSString class]])
        return string((NSString *)value);
    if ([id isKindOfClass:[NSArray class]])
        return array((NSArray *)value);
    if ([id isKindOfClass:[NSDictionary class]])
        return dictionary((NSDictionary *)value);
    return NULL;
}

The same idea can be used to convert CCObject subclasses to NSObject subclasses, type recognition possible with typeid

    const std::string name = typeid(*ccObject).name();
    if (name.find("CCDictionary") != std::string::npos) {
        return convert((const CCDictionary *)ccObject);
    } else if (name.find("CCArray") != std::string::npos) {
        return convert((const CCArray *)ccObject);
    } else if (name.find("CCString") != std::string::npos) {
        return convert((const CCString *)ccObject);
    }
    return nil;
#5

You can try my branch here:

I use NSDictionary to do the job for iOS & Mac, and using tinyxml2 for other platforms.
I put the implementation in CCFileUtils because CCDictionary::createWithContentsOfFile() is already in it.
It is not merged yet, because @Minggo though it may be not a good idea to implement this stuff in CCFileUtils.

What’s your opinion ?

Sergey Shambir wrote:

I mean that you can write function that recursively visits nested NSObjects and constructs CCDictionary/CCArray by copying
[…]
>
The same idea can be used to convert CCObject subclasses to NSObject subclasses, type recognition possible with typeid
[…]

#6

Nice improvement! I’ve also implemented alike thing two weeks ago, but your solution is more general-purpose (for example, we used binary format on iOS for backward compatibility).

I want also mention (again) that CCDictionary::createWithContentsOfFile() works incorrectly with escaped text nodes. Just put “keytest” as dictionary key and similar text as dictionary value, than save it with CCDictionary::writeToFile(). Parser will read garbage on all platforms except iOS/OSX. Tinyxml-based reader works OK.

Dai tianqi wrote:

You can try my branch here:
https://github.com/cocos2d/cocos2d-x/pull/2361
>
I use NSDictionary to do the job for iOS & Mac, and using tinyxml2 for other platforms.
I put the implementation in CCFileUtils because CCDictionary::createWithContentsOfFile() is already in it.
It is not merged yet, because @Minggo though it may be not a good idea to implement this stuff in CCFileUtils.
>
What’s your opinion ?
>
>
Sergey Shambir wrote:
> I mean that you can write function that recursively visits nested NSObjects and constructs CCDictionary/CCArray by copying
> […]
>
> The same idea can be used to convert CCObject subclasses to NSObject subclasses, type recognition possible with typeid
> […]

#7

so can u give instruction for your idea.thank u very much. so if can i use ccdictionary to save and load data from plist ??

#8

i find way to write data to plist

NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile: path];
//here add elements to data file and write data to file 
int value = 5;
[data setObject:[NSNumber numberWithInt:value] forKey:@”value”];
[data writeToFile: path atomically:YES]; 
[data release]

anyone can convert it to cocos2dx

#9

Check this out for PLIST’s PLIST Video Tutorial