小编Gia*_*ang的帖子

在Objetive-C中,当我想要指针的设置/更改值时.我用

*pointer = value

但是在Swift中,如何获取/设置指针的值？

我正在使用位图像素:

  NSUInteger offsetPixelCountForInput = ghostOrigin.y * inputWidth + ghostOrigin.x;
  for (NSUInteger j = 0; j < ghostSize.height; j++) {
    for (NSUInteger i = 0; i < ghostSize.width; i++) {
      UInt32 * inputPixel = inputPixels + j * inputWidth + i + offsetPixelCountForInput;
      UInt32 inputColor = *inputPixel;

      newR = MAX(0,MIN(255, newR));
      newG = MAX(0,MIN(255, newG));
      newB = MAX(0,MIN(255, newB));

        *inputPixel = RGBAMake(newR, newG, newB, A(inputColor));
    }
  }

所以我想将这段代码转换成Swift,但我仍然坚持使用指针.

23.03.2016 - 更新代码

var inputPixels:UnsafeMutablePointer<UInt32> = nil
inputPixels …