应用程序崩溃 - 调试说"objc_msgsend"

Question

我已经为iphone启动了一款基于2d平铺的游戏,我将直接跳到我的课程和问题.我现在完全有2级Tile,Table和Base主类Tile

`@interface Tile : NSObject {
 CCSprite *sprite;
 CCSprite *outline;
 int row,column;
 BOOL highLight;
}


@property (nonatomic , retain)CCSprite *sprite;
@property (nonatomic , retain)CCSprite *outline;

@property (nonatomic, readonly) int row, column;
@property (nonatomic , readwrite)BOOL highLight;
-(id) initWithSpriteName: (NSString*)argSpriteName Row:(int)argRow Column:(int)argColumn Position:(CGPoint)argPosition;

@end`

表

`@interface Table : NSObject {
 CCLayer *layer;
 CGSize  size;
 NSArray *icons;
 NSMutableArray *content;


}
@property(nonatomic, retain) NSMutableArray *content;
@property(nonatomic, retain) CCLayer *layer;
@property(nonatomic, readonly) CGSize size;
-(id) initWithTableSize:(CGSize)argSize; 
-(void)render;
-(Tile *) objectAtX: (int) x Y: (int) y;
` 

通话课程(主要)

@interface HelloWorld : CCLayer
{
 CGSize  size;
 Table  *tableLayer;
}
@property (retain) Table  *tableLayer;

履行

-(id) init
{
 // always call "super" init
 // Apple recommends to re-assign "self" with the "super" return value
 if( (self=[super init] )) {
  ......
                tableLayer = [[Table alloc] initWithTableSize:CGSizeMake(4,7) ];
  tableLayer.layer = self;
  [tableLayer render];
  self.isTouchEnabled = YES;
  self.isAccelerometerEnabled = YES;
  [self schedule:@selector(render:)];
  [[UIAccelerometer sharedAccelerometer] setUpdateInterval:(1.0 / 30)];


}
 return self;
}

.
.
.

-(void) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInView: [touch view]];
    CGPoint touchCorrected;
    touchCorrected.x = location.x;
    touchCorrected.y = 480 - location.y;
    int x = (int)(touchCorrected.x/48);
    int y = (int)(touchCorrected.y/48);
    printf("X = %d Y = %d \n",x,y);
    if (x!=0 && y!=0) {
   Tile *tile = [tableLayer objectAtX:(1) Y:(1)];
   [tile setHighLight:YES];
     }
}

在触摸结束回调中调用以下语句时,我的程序崩溃了

   Tile *tile = [tableLayer objectAtX:(1) Y:(1)];

我已经阅读了很少的博客但是真的很难理解消息传递背后的概念,请你解释一下应用程序崩溃的原因是什么导致"objc_msgsend".

Answer 1

这很可能是内存管理错误.我会查看Hamster Emporium的博客文章"你在objc_msgSend()中崩溃了".这非常有帮助.