如何將RGB轉換爲HTML顏色？

Question

請你能告訴我如何將RGB UIColor轉換爲十六進制HTML顏色代碼字符串嗎？

Answer 1

- (NSString *)getHexStringForColor:(UIColor*)color { 
    const CGFloat *components = CGColorGetComponents(color.CGColor); 
    CGFloat r = components[0]; 
    CGFloat g = components[1]; 
    CGFloat b = components[2]; 

    return [NSString stringWithFormat:@"%02X%02X%02X", (int)(r * 255), (int)(g * 255), (int)(b * 255)]; 
}