UIColor+Hexcode

 

UIColor+Hexcode

 

 

참 다양한 케이스가 있는 것 같다. 

 

이번에는 웹뷰(UIWebView)에서 Native영역의 상단 타이틀 컬러를 변경해야하는 상황이라 잠시 고민을 했다. 기존에 사용하던 매크로는 다음과 같은 형식으로 정의 되어있다. 

 

#define UIColorFromRGB(rgbValue) [UIColor \

colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \

green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \

 

blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

 

 

사용할때는 [view setBackgroundColor:UIColorFromRGB(0xffffff)] 와 같은데 , 웹에서 올라온 color값을 NSString으로 받아서("FFFFFF") 처리할려니 살짝 당황스러웠다. 

 

가지고 있는 리소스들 중에서 찾아보니 적당히 괜찮은 Category Method가 있어서 옮겨보고자 한다. 

 

 

 

//

//  CATEGORY

//



/**

 * Translate a hexcode string ( i.e. #FFFFFF ) to a UIColor instance equivalent

 *

 * @return UIColor

 *

 * @example

 * NSString *hexcode = @"#FFFFFF";

 * UIColor *color = [UIColor colorFromHexCode:hexCode];

 */

+(UIColor *)colorFromHexCode:(NSString *)hexCode;







//

//  INSTANCE

//



/**

 * Returns a hexcode string ( i.e., #FFFFFF ) for the current color

 *

 * @return NSString

 *

 * @example

 * UIColor *color = [UIColor redColor];

 * NSString *hexColor = [color hexCodeColor];

 */

 

-(NSString *)hexCodeColor;

 

 

---

 

/**

 * This is some code I wrote for an app a buddy of mine and I work on from time to time called eLBee.

 */



+(UIColor *)colorFromHexCode:(NSString *)colorString {

    if (![colorString hasPrefix:@"#"]) {

        colorString = [NSString stringWithFormat:@"#%@", colorString];

    }

    

    if(colorString.length == 7) {

        const char *colorUTF8String = [colorString UTF8String];

        int r, g, b;

        sscanf(colorUTF8String, "#%2x%2x%2x", &r, &g, &b);

        return [UIColor colorWithRed:(r / 255.0) green:(g / 255.0) blue:(b / 255.0) alpha:1.0];

    }

    

    return [UIColor blackColor];

}







/**

 * Original Source for code below: https://github.com/nicklockwood/ColorUtils/blob/master/ColorUtils/ColorUtils.m

 *

 * Note: Made some minor mods... JGH 05/30/2014

 */



//

//  ColorUtils.m

//

//  Version 1.1.2

//

//  Created by Nick Lockwood on 19/11/2011.

//  Copyright (c) 2011 Charcoal Design

//

//  Distributed under the permissive zlib License

//  Get the latest version from here:

//

//  https://github.com/nicklockwood/ColorUtils

//

//  This software is provided 'as-is', without any express or implied

//  warranty.  In no event will the authors be held liable for any damages

//  arising from the use of this software.

//  Permission is granted to anyone to use this software for any purpose,

//  including commercial applications, and to alter it and redistribute it

//  freely, subject to the following restrictions:

//

//  1. The origin of this software must not be misrepresented; you must not

//  claim that you wrote the original software. If you use this software

//  in a product, an acknowledgment in the product documentation would be

//  appreciated but is not required.

//

//  2. Altered source versions must be plainly marked as such, and must not be

//  misrepresented as being the original software.

//

//  3. This notice may not be removed or altered from any source distribution.

//





//

-(NSString *)hexCodeColor {

    

    CGFloat alpha = CGColorGetAlpha( self.CGColor );

    

    if( alpha < 1.0f ) {

        return [NSString stringWithFormat:@"#%.8x", [self RGBAValue]];

    }

    

    //don't include alpha component

    return [NSString stringWithFormat:@"#%.6x", [self RGBValue]];

}



-(uint32_t)RGBValue {

    CGFloat rgba[4];

    

    CGColorSpaceModel model = CGColorSpaceGetModel(CGColorGetColorSpace(self.CGColor));

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

    

    switch(model) {

        case kCGColorSpaceModelMonochrome: {

            rgba[0] = components[0];

            rgba[1] = components[0];

            rgba[2] = components[0];

            rgba[3] = components[1];

        }

            break;

            

        case kCGColorSpaceModelRGB: {

            rgba[0] = components[0];

            rgba[1] = components[1];

            rgba[2] = components[2];

            rgba[3] = components[3];

        }

            break;

            

        default: {

            rgba[0] = 0.0f;

            rgba[1] = 0.0f;

            rgba[2] = 0.0f;

            rgba[3] = 1.0f;

        }

            break;

    }

    

    uint32_t red = (uint32_t)(rgba[0]*255);

    uint32_t green = (uint32_t)(rgba[1]*255);

    uint32_t blue = (uint32_t)(rgba[2]*255);

    

    return (red << 16) + (green << 8) + blue;

}



-(uint32_t)RGBAValue {

    CGFloat rgba[4];

    

    CGColorSpaceModel model = CGColorSpaceGetModel(CGColorGetColorSpace(self.CGColor));

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

    

    switch( model ) {

        case kCGColorSpaceModelMonochrome: {

            rgba[0] = components[0];

            rgba[1] = components[0];

            rgba[2] = components[0];

            rgba[3] = components[1];

        }

            break;

            

        case kCGColorSpaceModelRGB: {

            rgba[0] = components[0];

            rgba[1] = components[1];

            rgba[2] = components[2];

            rgba[3] = components[3];

        }

            break;

            

        default: {

            rgba[0] = 0.0f;

            rgba[1] = 0.0f;

            rgba[2] = 0.0f;

            rgba[3] = 1.0f;

        }

            break;

    }

    

    uint8_t red = (uint8_t)(rgba[0]*255);

    uint8_t green = (uint8_t)(rgba[1]*255);

    uint8_t blue = (uint8_t)(rgba[2]*255);

    uint8_t alpha = (uint8_t)(rgba[3]*255);

    

    return (red << 24) + (green << 16) + (blue << 8) + alpha;



}