objective-c - 我很困惑。我的代码怎么了？关于malloc和函数将指针传递给指针

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- (void) rgbMatrix:(UIImage *)i toRGB:(uint32_t **)rgbArray{
    int m_width = i.size.width;
    int m_height = i.size.height;
    *rgbArray = (uint32_t *) malloc(m_width * m_height * sizeof(uint32_t));
}

uint32_t *rgbArray = NULL;
[self rgbMatrix:image toRGB:&rgbArray];

有人可以帮忙吗？这是行不通的。在Objective-c中使用malloc不支持这种方式吗？

最佳答案

您似乎正确地通过引用传递了指针。

唯一可能存在问题的区域是将rgbArray声明为null（我认为只写uint32_t * rgbArray;是不正确的）。另一个问题是释放内存