小编Ily*_*ski的帖子

当我尝试发布字典时,我得到一个例外.

这是我的代码:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    if (!tableDataDictionary)
{
    DebugLog(@"initializing tableDataDictionary");
    tableDataDictionary = [ [NSMutableDictionary alloc] init];
}
}

-(void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [mainTableView deselectRowAtIndexPath: [mainTableView indexPathForSelectedRow] animated:NO];

    [tableDataDictionary release];
}

我该如何解决？

我有以下代码:

#define checkLiteMessage    \
{   \
    #ifdef LITE_VERSION \
    if (alertView.tag == 100)   \
    {   \
        if (buttonIndex == 1)   \
        [ [UIApplication sharedApplication] openURL: buyAppLink];   \
        [alertView release];    \
        return; \
    }   \
    #endif  \
}   \

我想要做的是每次调用checkLiteMessage时都要包含以下代码:

    #ifdef LITE_VERSION
    if (alertView.tag == 100)
    {
        if (buttonIndex == 1)
        [ [UIApplication sharedApplication] openURL: buyAppLink];
        [alertView release];
        return;
    }
    #endif

我的问题是什么？为什么这段代码不能编译？

谢谢.

我有一个结构,并在其中指向2D数组.但是当我尝试将一个实际的2D数组分配给该指针时,我没有成功 - 编译器说我的指针是指向一维数组的指针.

这是我的代码:

typedef GLfloat Vertex2f[2];
typedef GLfloat TextureCoordinate[2];

typedef struct { 
    GLuint texture_name;  // OpenGL ID of texture used for this sprite 
    Vertex2f *vertices; // array of vertices 
    TextureCoordinate *texture_coords; // texture vertices to match

    GLubyte *vertex_indices;
} game_sprite;

void loadState()
{
    game_sprite ballSprite;

    createAndLoadTexture("ball.png", &ballSprite.texture_name);

    const Vertex2f tempVerticesArray[4] =  {
        {-100.0f, -100.0f},
        {-100.0f, 100.0f},
        {100.0f, 100.0f},
        {100.0f, -100.0f}
    };

    ballSprite.vertices = &tempVerticesArray; //The problem appears to be here
}

我怎样才能使它工作？

谢谢.

我有一个小问题.当从objective-c函数传递给c函数时,我有一个数组并且它的大小发生了变化.

void test(game_touch *tempTouches)
{
    printf("sizeof(array): %d", sizeof(tempTouches) );
}

-(void)touchesEnded: (NSSet *)touches withEvent: (UIEvent *)event
{
    game_touch tempTouches[ [touches count] ];
    int i = 0;

    for (UITouch *touch in touches)
    {
        tempTouches[i].tapCount = [touch tapCount];

        tempTouches[i].touchLocation[0] = (GLfloat)[touch locationInView: self].x;
        tempTouches[i].touchLocation[1] = (GLfloat)[touch locationInView: self].y;

        i++;
    }

    printf("sizeof(array): %d", sizeof(tempTouches) );

    test(tempTouches);
}

控制台日志是:

[touchesEnded] sizeof(array): 12
[test] sizeof(array): 4

为什么两种方法的大小不同？

在[test]方法中,返回大小始终为4,而不依赖于数组的原始大小.

谢谢.