In my effort to save a ScrollingBackground object I've subclassed the CCSprites to conform to NSCoding. The ScrollingBackground doesn't display. Please see the relevant code below. I'm not really sure whats wrong. Please help.
ScrollingBackground.h: (CCBackgroundSprite's interface)
@interface CCBackgroundSprite: NSObject <NSCoding>
@property (nonatomic, assign) float xValue;
@property (nonatomic, assign) float yValue;
@property (nonatomic, retain) NSString* backgroundStringName;
@end
ScrollingBackground.m: (CCBackgroundSprite's implementation)
@implementation CCBackgroundSprite
-(id)init
{
if((self = [super init])){
}
return self;
}
-(id) initWithCoder:(NSCoder *) aDecoder {
self = [super init];
if(self != nil) {
self.xValue = [aDecoder decodeFloatForKey:@"xValue"];
self.yValue = [aDecoder decodeFloatForKey:@"yValue"];
self.backgroundStringName = [aDecoder decodeObjectForKey:@"backgroundStringName"];
}
return self;
}
-(void) encodeWithCoder:(NSCoder *)aCoder {
[aCoder encodeFloat:self.xValue forKey:@"xValue"];
[aCoder encodeFloat:self.yValue forKey:@"yValue"];
[aCoder encodeObject:self.backgroundStringName forKey:@"backgroundStringName"];
}
@end
Setting CCBackgroundSprite's instances for the CCSprite properties:
-(void)spriteProperties {
background1 = [[CCBackgroundSprite alloc] init];
[background1 setXValue:bg.position.x];
[background1 setYValue:bg.position.y];
[background1 setBackgroundStringName:@"bg"];
background2 = [[CCBackgroundSprite alloc] init];
[background2 setXValue:bgSwap.position.x];
[background2 setYValue:bgSwap.position.y];
[background2 setBackgroundStringName:@"bgSwap"];
background3 = [[CCBackgroundSprite alloc] init];
[background3 setXValue:bgSwap2.position.x];
[background3 setYValue:bgSwap2.position.y];
[background3 setBackgroundStringName:@"bgSwap2"];
}
encoding/decoding of other non-Sprite related properties of the ScrollingBackground:
-(void) encodeWithCoder:(NSCoder *)aCoder {
[aCoder encodeInt:self.backgroundCount forKey:@"backgroundCount"];
[aCoder encodeInt:self.backgroundRepeatCount forKey:@"backgroundRepeatCount"];
[aCoder encodeFloat:self.scrollSpeed forKey:@"scrollSpeed"];
[aCoder encodeObject:self.backgroundArray forKey:@"backgroundArray"];
[aCoder encodeObject:self.changeArray forKey:@"changeArray"];
.
.
.
}
-(id) initWithCoder:(NSCoder *) aDecoder {
self = [super init];
if(self != nil) {
self.backgroundCount = [aDecoder decodeIntForKey:@"backgroundCount"];
self.backgroundRepeatCount = [aDecoder decodeIntForKey:@"backgroundRepeatCount"];
self.scrollSpeed = [aDecoder decodeFloatForKey:@"scrollSpeed"];
self.backgroundArray = [aDecoder decodeObjectForKey:@"backgroundArray"];
self.changeArray = [aDecoder decodeObjectForKey:@"changeArray"];
.
.
.
}
}
Saving and loading of ScrollingBackground object:
- (void)saveBackgroundObject:(ScrollingBackground *)object key:(NSString *)key {
[self spriteProperties];
NSData *encodedObject = [NSKeyedArchiver archivedDataWithRootObject:object];
NSString *dataToString = [NSString stringWithFormat:@"%@", encodedObject];
CCLOG(@"encodedObject = %@ \n", dataToString);
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:encodedObject forKey:key];
[defaults synchronize];
}
-(ScrollingBackground *)loadBackgroundWithKey:(NSString *)key {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSData *encodedObject = [defaults objectForKey:key];
NSString *dataToString = [NSString stringWithFormat:@"%@", encodedObject];
CCLOG(@"encodedObject = %@ \n", dataToString);
ScrollingBackground *object = [NSKeyedUnarchiver unarchiveObjectWithData:encodedObject];
return object;
}
UPDATED:
I have made the following changes the spriteProperties method:
-(void)spriteProperties {
background1 = [[CCBackgroundSprite alloc] init];
[background1 setXValue:bg.position.x];
[background1 setYValue:bg.position.y];
[background1 setBackgroundImageName:bg.displayFrame.textureFilename];
[self addChild:background1];
background2 = [[CCBackgroundSprite alloc] init];
[background2 setXValue:bgSwap.position.x];
[background2 setYValue:bgSwap.position.y];
[background2 setBackgroundImageName:bgSwap.displayFrame.textureFilename];
[self addChild:background2];
background3 = [[CCBackgroundSprite alloc] init];
[background3 setXValue:bgSwap2.position.x];
[background3 setYValue:bgSwap2.position.y];
[background3 setBackgroundImageName:bgSwap2.displayFrame.textureFilename];
[self addChild:background3];
}
The main reason I am using displayFrame.textureFilename above is because I'm reusing the sprites along the way.
Also to setup of the background images I did:
-(void)startingSprites //change later to setupInitialBackground
{
CGSize s = [[CCDirector sharedDirector] winSize];
bg = [CCSprite spriteWithSpriteFrameName:@"bgImage1.png"];
bg.position = ccp(s.width/2, s.height/2);
[currentBackgroundBatchNode addChild:bg];
swapbg = [CCSprite spriteWithSpriteFrameName:@"bgImage2.png"];
swapbg.position = ccp(s.width/2, 3*s.height/2 -1.0);
[currentBackgroundBatchNode addChild: swapbg];
swapbg2 = [CCSprite spriteWithSpriteFrameName:@"bgImage3.png"];
swapbg2.position = ccp(s.width/2, 5*s.height/2 - 2.0);
[currentBackgroundBatchNode addChild: swapbg2];
CCLOG(@"bg background is %@", bg.displayFrame.textureFilename);
CCLOG(@"bgSwap background is %@", swapbg.displayFrame.textureFilename);
CCLOG(@"bgSwap2 background is %@", swapbg2.displayFrame.textureFilename);
}
I've just realized a few things:
- the CCLOG's in
startingSpritesare null - I reuse the
currentBackgroundBatchNode(which is aCCSpriteBatchNode) along the way, meaning that I have to encode/decode it. How do I subclass it and with what properties? Not too sure how it'll work out.
