Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
Relevant replacement documents include:
RemindersPlugIn/NSColorHexadecimalValue.m
/* |
File: NSColorHexadecimalValue.m |
Abstract: Adds the hexadecimalValueOfAnNSColor method to the NSColor class |
that returns the hexadecimal value of a color. |
Version: <1.0> |
Disclaimer: IMPORTANT: This Apple software is supplied to you by |
Apple Inc. ("Apple") in consideration of your agreement to the |
following terms, and your use, installation, modification or |
redistribution of this Apple software constitutes acceptance of these |
terms. If you do not agree with these terms, please do not use, |
install, modify or redistribute this Apple software. |
In consideration of your agreement to abide by the following terms, and |
subject to these terms, Apple grants you a personal, non-exclusive |
license, under Apple's copyrights in this original Apple software (the |
"Apple Software"), to use, reproduce, modify and redistribute the Apple |
Software, with or without modifications, in source and/or binary forms; |
provided that if you redistribute the Apple Software in its entirety and |
without modifications, you must retain this notice and the following |
text and disclaimers in all such redistributions of the Apple Software. |
Neither the name, trademarks, service marks or logos of Apple Inc. |
may be used to endorse or promote products derived from the Apple |
Software without specific prior written permission from Apple. Except |
as expressly stated in this notice, no other rights or licenses, express |
or implied, are granted by Apple herein, including but not limited to |
any patent rights that may be infringed by your derivative works or by |
other works in which the Apple Software may be incorporated. |
The Apple Software is provided by Apple on an "AS IS" basis. APPLE |
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION |
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS |
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND |
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. |
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL |
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, |
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED |
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), |
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE |
POSSIBILITY OF SUCH DAMAGE. |
Copyright (C) 2008 Apple Inc. All Rights Reserved. |
*/ |
#import "NSColorHexadecimalValue.h" |
@implementation NSColor(NSColorHexadecimalValue) |
/* Returns the hexadecimal value of a color. Several steps are involved in this process: |
-Convert the color object to the RGB color space |
-Get the red, green, and blue components of the color |
-Convert the components to the web color space, which consists of numbers (unsigned decimal integer) between 0 and 255 |
-Convert each number to a two-digit hex string |
-Concatenate the red, green, and blue components' hex strings together with a "#" |
*/ |
-(NSString *)hexadecimalStringValue |
{ |
float redFloatValue, greenFloatValue, blueFloatValue; |
int redIntValue, greenIntValue, blueIntValue; |
/* This step is important. We must convert an NSColor to the appropriate color space before accessing its individual components |
as recommended in the Can I Access the Components of Any NSColor Object? section of the Color Programming Topics for Cocoa. |
*/ |
NSColor *convertedColor = [self colorUsingColorSpaceName:NSCalibratedRGBColorSpace]; |
if(convertedColor) |
{ |
/* Get the red, green, and blue components of the color */ |
[convertedColor getRed:&redFloatValue green:&greenFloatValue blue:&blueFloatValue alpha:NULL]; |
/* Convert the components to numbers (unsigned decimal integer) between 0 and 255 */ |
redIntValue = redFloatValue*255.99999f; |
greenIntValue = greenFloatValue*255.99999f; |
blueIntValue = blueFloatValue*255.99999f; |
/* Convert the numbers to hex strings and concatenate all the hex strings together with a "#" */ |
return [NSString stringWithFormat:@"#%@%@%@", [NSString stringWithFormat:@"%02x", redIntValue], |
[NSString stringWithFormat:@"%02x", greenIntValue], |
[NSString stringWithFormat:@"%02x", blueIntValue]]; |
} |
return nil; |
} |
@end |
Copyright © 2008 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2008-07-25