-[_NSCFConstantString texture] error in Cocos2D - ios

Question

I am trying to create sprite animations for a game where when a user clicks on a button, it will spawn 1 unit/enemy, which will move across the screen in a running animation. At the moment, when I run the game, it will play and once I attempt to spawn a unit, the game crashes and gives me a -[__NSCFConstantString texture]: unrecognized selector sent to instance 0x11a15c error.
This is the header file for the Unit itself:
#import <Foundation/Foundation.h>
#import "cocos2d.h"
#import "mainGameLayer.h"
#class MainGameLayer, Waypoint, Tower;
#interface Unit : CCSprite {
CGPoint myPosition;
int maxHP;
int currentHP;
float walkingSpeed;
Waypoint *destinationWaypoint;
BOOL active;
float centerToBottom;
float centerToSides;
}
#property (nonatomic, assign) MainGameLayer *theGame;
#property (nonatomic, assign) CCSprite *mySprite;
#property (nonatomic, strong) CCAction *walkAction;
+(id) nodeWithTheGame: (MainGameLayer *)_game;
-(id) initWithTheGame: (MainGameLayer *)_game;
-(void) doActivate;
-(void) getRemoved;
#end
Below is the implementation file. The 'self = super initWithSpriteFrame' line is currently throwing a warning saying "Incompatible pointer types sending NSString * to parameter of type 'CCSpriteFrame *'.
Also, the "CCSprite *frame = [[CCSpriterameCache....." line is throwing another warning saying 'Flag 0 results in undefined behaviour with p conversion specifier.
#import "Unit.h"
#import "Tower.h"
#import "Waypoint.h"
#define HEALTH_BAR_WIDTH 20
#define HEALTH_BAR_ORIGIN -10
#implementation Unit
#synthesize mySprite, theGame;
+(id) nodeWithTheGame:(MainGameLayer *)_game
{
return [[self alloc] initWithTheGame:_game];
}
-(id) initWithTheGame:(MainGameLayer *)_game
{
if ((self = [super initWithSpriteFrame:#"hero_walk_00.png"])) {
theGame = _game;
maxHP = 40;
currentHP = maxHP;
active = FALSE;
walkingSpeed = 0.5;
centerToBottom = 39.0;
centerToSides = 29.0;
CCArray *walkFrames = [CCArray arrayWithCapacity: 8];
for (int i = 0; i < 8; i++) {
CCSprite *frame = [[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:[NSString stringWithFormat:#"hero_walk_%02.png", i]];
[walkFrames addObject: frame];
}
CCAnimation *walkAnimation = [CCAnimation animationWithSpriteFrames:[walkFrames getNSArray] delay:1.0/12.0];
self.walkAction = [CCRepeatForever actionWithAction:[CCAnimate actionWithAnimation:walkAnimation]];
Waypoint *waypoint = (Waypoint *)[theGame.waypoints objectAtIndex:([theGame.waypoints count]-1)];
destinationWaypoint = waypoint.nextWaypoint;
CGPoint pos = waypoint.myPosition;
myPosition = pos;
[mySprite setPosition: pos];
[theGame addChild: self];
[self scheduleUpdate];
}
return self;
}
-(void) doActivate
{
active = TRUE;
}
-(void) update:(ccTime)dt
{
if (!active) {
return;
}
if ([theGame circle:myPosition withRadius:1 collisionWithCircle:destinationWaypoint.myPosition collisionCircleRadius:1]) {
if (destinationWaypoint.nextWaypoint) {
destinationWaypoint = destinationWaypoint.nextWaypoint;
} else {
[theGame getHpDamage];
[self getRemoved];
}
}
CGPoint targetPoint = destinationWaypoint.myPosition;
float movementSpeed = walkingSpeed;
CGPoint normalized = ccpNormalize(ccp(targetPoint.x - myPosition.x, targetPoint.y - myPosition.y));
mySprite.rotation = CC_RADIANS_TO_DEGREES(atan2(normalized.y, -normalized.x));
myPosition = ccp(myPosition.x + normalized.x * movementSpeed, myPosition.y + normalized.y * movementSpeed);
[mySprite setPosition: myPosition];
}
-(void) getRemoved
{
[self.parent removeChild:self cleanup:YES];
[theGame.units removeObject: self];
// Notify the game that we killed an enemy so we can check if we can send another wave
[theGame enemyGotKilled];
}
-(void) draw
{
ccDrawSolidRect(ccp(myPosition.x + HEALTH_BAR_ORIGIN, myPosition.y + 16), ccp(myPosition.x + HEALTH_BAR_ORIGIN + HEALTH_BAR_WIDTH, myPosition.y + 14), ccc4f(1.0, 0, 0, 1.0));
ccDrawSolidRect(ccp(myPosition.x + HEALTH_BAR_ORIGIN, myPosition.y + 16), ccp(myPosition.x + HEALTH_BAR_ORIGIN + (float)(currentHP * HEALTH_BAR_WIDTH)/maxHP, myPosition.y + 14), ccc4f(0, 1.0, 0, 1.0));
}
#end
Here is the header file of the main game layer:
#import <Foundation/Foundation.h>
#import "cocos2d.h"
#interface MainGameLayer : CCLayer {
CCSpriteBatchNode *_actors;
}
+ (CCScene *) scene;
- (BOOL) circle:(CGPoint)circlePoint withRadius:(float)radius collisionWithCircle:(CGPoint)circlePointTwo collisionCircleRadius:(float)radiusTwo;
void ccFillPoly (CGPoint *poli, int points, BOOL closePolygon);
- (void) enemyGotKilled;
- (void) getHpDamage;
#property (nonatomic, strong) NSMutableArray *towers;
#property (nonatomic, strong) NSMutableArray *waypoints;
#property (nonatomic, strong) NSMutableArray *units;
#end
And the implementation file:
#import "MainGameLayer.h"
#import "Tower.h"
#import "Waypoint.h"
#import "Unit.h"
#implementation MainGameLayer
#synthesize towers;
#synthesize waypoints;
#synthesize units;
+ (CCScene *) scene
{
CCScene *scene = [CCScene node];
MainGameLayer *layer = [MainGameLayer node];
[scene addChild: layer];
return scene;
}
- (id) init
{
if ((self = [super init])) {
// Initialize
self.isTouchEnabled = TRUE;
CGSize winSize = [CCDirector sharedDirector].winSize;
// Setting the background (Map)
CCSprite *background = [CCSprite spriteWithFile:#"layout.png"];
[self addChild: background];
[background setPosition: ccp(winSize.width/2, winSize.height/2)];
[self addWaypoints];
// In Game Buttons / Menu
CCMenuItem *sampleButton = [CCMenuItemImage itemWithNormalImage:#"sample.jpg" selectedImage:#"sample.jpg" target:self selector:#selector(samplePurchased:)];
CCMenu *PurchaseUI = [CCMenu menuWithItems:sampleButton, nil];
[PurchaseUI setScale:0.5];
[PurchaseUI setPosition:ccp(63, 51)];
[PurchaseUI alignItemsHorizontally];
PurchaseUI.isTouchEnabled = TRUE;
[self addChild: PurchaseUI];
// Set up the sprite sheets (Currently in testing)
[[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:#"pd_sprites.plist"];
_actors = [CCSpriteBatchNode batchNodeWithFile:#"pd_sprites.pvr.ccz"];
[_actors.texture setAliasTexParameters];
[self addChild: _actors];
}
return self;
}
-(BOOL) canBuyTower
{
return YES;
}
-(void) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
for (UITouch *touch in touches) {
CGPoint location = [touch locationInView: [touch view]];
location = [[CCDirector sharedDirector] convertToGL: location];
CCLOG(#"X: %f Y: %f", location.x, location.y);
if ([self canBuyTower]) {
// Spend the gold later
Tower *tower = [Tower nodeWithTheGame:self location: location];
[towers addObject: tower];
}
}
}
-(void) addWaypoints
{
waypoints = [[NSMutableArray alloc] init];
Waypoint * waypoint1 = [Waypoint nodeWithTheGame:self location:ccp(-25,360)];
[waypoints addObject:waypoint1];
Waypoint * waypoint2 = [Waypoint nodeWithTheGame:self location:ccp(73,360)];
[waypoints addObject:waypoint2];
waypoint2.nextWaypoint =waypoint1;
Waypoint * waypoint3 = [Waypoint nodeWithTheGame:self location:ccp(467,360)];
[waypoints addObject:waypoint3];
waypoint3.nextWaypoint =waypoint2;
Waypoint * waypoint4 = [Waypoint nodeWithTheGame:self location:ccp(905,360)];
[waypoints addObject:waypoint4];
waypoint4.nextWaypoint =waypoint3;
Waypoint * waypoint5 = [Waypoint nodeWithTheGame:self location:ccp(1050,360)];
[waypoints addObject:waypoint5];
waypoint5.nextWaypoint =waypoint4;
}
-(BOOL) circle:(CGPoint)circlePoint withRadius:(float)radius collisionWithCircle:(CGPoint)circlePointTwo collisionCircleRadius:(float)radiusTwo
{
float xdif = circlePoint.x - circlePointTwo.x;
float ydif = circlePoint.y - circlePointTwo.y;
float distance = sqrt(xdif*xdif + ydif*ydif);
if (distance <= radius + radiusTwo) {
return TRUE;
}
return FALSE;
}
-(void) samplePurchased: (id)sender
{
Unit *tempUnit = [Unit nodeWithTheGame: self];
[units addObject: tempUnit];
[tempUnit doActivate];
}
#end
I'm basically just working off some of the tutorials on the Ray Wenderlich website; I haven't run into any of these errors before and haven't been able to find much help on Google. Any help here is much appreciated! Thank you in advance!
EDIT: After making the changes I am now getting an invisible sprite move across the screen. The sprite's health bar will appear and move across the screen but not the actual sprite / animation itself. Any reasons for this?

Answer 1

[super initWithSpriteFrame:#"hero_walk_00.png"]
expects a CCSpriteFrame* as parameter, not a NSString*. This is why you get a compiler warning for this line - don't ignore compiler warnings!
The fix is simple, use the correct initializer:
[super initWithSpriteFrameName:#"hero_walk_00.png"]
And this returns a CCSpriteFrame* not a CCSprite*:
CCSprite *frame = [[CCSpriteFrameCache sharedSpriteFrameCache]
spriteFrameByName:[NSString stringWithFormat:#"hero_walk_%02.png", i]];
Hence the other warning. The fix:
CCSpriteFrame *frame = ...