iOS获取UIColor对象的RGB值

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- (NSDictionary *)getRGBDictionaryByColor:(UIColor *)originColor

{

  CGFloat r=0,g=0,b=0,a=0;

  if ([self respondsToSelector:@selector(getRed:green:blue:alpha:)]) {

    [originColor getRed:&r green:&g blue:&b alpha:&a];

  }

  else {

    const CGFloat *components = CGColorGetComponents(originColor.CGColor);

    r = components[0];

    g = components[1];

    b = components[2];

    a = components[3];

  }

  return @{@"R":@(r),

           @"G":@(g),

           @"B":@(b),

           @"A":@(a)};

}

iOS获取UIColor对象的RGB值

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原文地址：http://blog.csdn.net/shouqiangwei/article/details/42454755