如何改變NSColor對象的值轉換成其8位值

Question

我需要值轉換NSColor對象轉換到8位的整數值

代碼：我收到

uint8_t r = (uint32_t)(MIN(1.0f, MAX(0.0f, [[CWhiteBoardController ReturnFillColor] redComponent])) * 0xff); 

uint8_t g = (uint32_t)(MIN(1.0f, MAX(0.0f, [[CWhiteBoardController ReturnFillColor] greenComponent])) * 0xff); 

uint8_t b = (uint32_t)(MIN(1.0f, MAX(0.0f, [[CWhiteBoardController ReturnFillColor] blueComponent])) * 0xff); 

uint8_t a = (uint32_t)(MIN(1.0f, MAX(0.0f, [[CWhiteBoardController ReturnFillColor] alphaComponent])) * 0xff); 

uint8_t value = (a << 24) | (r<< 16) | (g << 8) | b; 

值爲0

我沒有得到我錯的地方。 因此，任何人都可以幫我解決問題。

Answer 1

我來認識這個問題，其實我需要寫

int值=（A < < 24）| （r < < 16）| （g < < 8）| b; 代替 uint8_t value =（a < < 24）| （r < < 16）| （g < < 8）| b;