UIColor+Hex.m

//
//  UIColor+Hex.m
//  Broken
//
//  Created by Mujtaba Hussain on 7/04/11.
//  Copyright (c) 2011, Kevin O'Neill
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are met:
//
//  * Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
//
//  * Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the distribution.
//
//  * Neither the name UsefulBits nor the names of its contributors may be used
//   to endorse or promote products derived from this software without specific
//   prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
//  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
//  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
//  DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
//  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
//  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
//  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
//  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
//  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
//  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#import "UIColor+Hex.h"

@implementation UIColor (Hex)

+ (UIColor *)colorWithHex:(NSInteger)color
{
  return [UIColor colorWithHex:color alpha:1.0];
}

+ (UIColor *)colorWithHex:(NSInteger)color alpha:(float)alpha
{
  return [UIColor colorWithRed:((float)((color & 0xFF0000) >> 16))/255.0
                         green:((float)((color & 0xFF00) >> 8))/255.0
                          blue:((float)(color & 0xFF))/255.0 alpha:alpha];
}

+ (UIColor *)colorWithHexString:(NSString *)hexString;
{
  if (nil == hexString) return nil;
  
  NSString *alphaString = nil;
  NSUInteger aValue = 0;
  
  if ([hexString length] == 10)
  {
    alphaString = [hexString substringWithRange:NSRangeFromString(@"2 2")];
    NSScanner *aScanner = [NSScanner scannerWithString:alphaString];
    
    BOOL parseSuccessful = [aScanner scanHexInt: &aValue];
    NSAssert(parseSuccessful, @"Invalid extended hex color alpha %@", alphaString);
    
    hexString = [NSString stringWithFormat:@"%@%@",[hexString substringWithRange:NSRangeFromString(@"0 2")],[hexString substringWithRange:NSRangeFromString(@"4 6")]];
  }
  
  NSScanner *pScanner = [NSScanner scannerWithString:hexString];
  
  NSUInteger iValue;
  BOOL parseSuccessful = [pScanner scanHexInt: &iValue];
  NSAssert(parseSuccessful, @"Invalid hex color %@", hexString);
  
  if (aValue > 0)
  {
    return [UIColor colorWithHex:iValue alpha:((float)aValue/255.0)];
  }
  
  return [UIColor colorWithHex:iValue];
}

@end