cocos2D iOS tutorial 4

Tutorial 4A: Shared Data Singleton

Create a class call GameData (inherit from NSObject) that is to be shared across the game, between multiple scenes. GameData should contain member variables such as player’s life, score, level, experience points, gold, state and so on. These data are persistent throughout the game and not just in a scene (those local data only used in a scene should be under the scene’s member variable). You may want to store the pointer to your Object Manager in GameData, so that it can be used in multiple scenes.

Sample code 1

GameData.h
@interface GameData : NSObject {
int hp;
int score;
int level;
int xp;
int gold;
int state;
};
@property(nonatomic) int hp;

+ (GameData *)sharedData;
@end

GameData.m
static GameData *data = nil;
@implementation GameData
+ (GameData *)sharedData {
if(data == nil) {
data = [[GameData alloc] init];
gold = 100;
hp = 20;
score = 0;

}
return data;
}

@end

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