如何将UIColor RGB颜色转换为uint32_t值

Question

如何将UIColor对象转换为uint32_t值。如果有人意识到这一点，请告诉我？

以下是代码：

const CGFloat *components = CGColorGetComponents([UIColor redColor].CGColor);
   CGFloat r = components[0];
   CGFloat g = components[1];
   CGFloat b = components[2];
  const  uint32_t rgb = ((uint32_t)r << 16 | (uint32_t)g << 8 | (uint32_t)b);

如何在uint32_t中传递0xFFFFFFFF值？

 const uint32_t white = 0xFFFFFFFF, black = 0xFF000000, transp = 0x00FFFFFF;

Answer 1

如果要将十六进制字符串转换为整数值，请尝试以下操作：

unsigned int outVal;
NSScanner* scanner = [NSScanner scannerWithString:@"0xFF000000"];
[scanner scanHexInt:&outVal];