我正在尝试为游戏创建精灵动画，当用户单击按钮时，它将生成 1 个单位/敌人，这些单位/敌人将在正在运行的动画中在屏幕上移动。目前，当我运行游戏时，它会播放，一旦我尝试生成一个单位，游戏就会崩溃并给我一个 -[__NSCFConstantString纹理]：无法识别的选择器发送到实例0x11a15c错误。
这是单元本身的头文件：
#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
下面是实现文件。"self = super initWithSpriteFrame"行当前抛出警告，指出"不兼容的指针类型将 NSString * 发送到类型为"CCSpriteFrame *"的参数。
此外，"CCSprite *frame = [[CCSpriterameCache....."line 抛出另一个警告，指出"标志 0 会导致 p 转换说明符出现未定义的行为。
#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
以下是主游戏层的头文件：
#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
和实现文件：
#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
我基本上只是在研究雷·温德利希网站上的一些教程;我以前没有遇到过任何这些错误，也无法在 Google 上找到太多帮助。这里的任何帮助都非常感谢！提前谢谢你！
编辑：进行更改后，我现在在屏幕上移动了一个不可见的精灵。精灵的生命条将出现并在屏幕上移动，但实际的精灵/动画本身不会。这有什么原因吗？
[super initWithSpriteFrame:@"hero_walk_00.png"]
需要 CCSpriteFrame* 作为参数，而不是 NSString*。这就是为什么您会收到此行的编译器警告 - 不要忽略编译器警告！
修复很简单，使用正确的初始值设定项：
[super initWithSpriteFrameName:@"hero_walk_00.png"]
这将返回一个 CCSpriteFrame* 而不是 CCSprite*：
CCSprite *frame = [[CCSpriteFrameCache sharedSpriteFrameCache]
spriteFrameByName:[NSString stringWithFormat:@"hero_walk_%02.png", i]];
因此，另一个警告。修复：
CCSpriteFrame *frame = ...