Make UIColor support hex color codes
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// | |
// UIColor+PXExtensions.h | |
// Creates UIColor from hex string. "#" prefix is optional. Supports 3 and 6 hex digits. | |
// Originally from http://pixelchild.com.au/post/12785987198/how-to-convert-a-html-hex-string-into-uicolor-with | |
// But that link seems to be broken. | |
// Revived by Thongchai Kolyutsakul (21 May 2015). | |
// | |
// USAGE: UIColor *mycolor = [UIColor pxColorWithHexValue:@"#BADA55"]; | |
// UIColor *mycolor = [UIColor pxColorWithHexValue:@"FFFFFF"]; | |
// UIColor *mycolor = [UIColor pxColorWithHexValue:@"1AD"]; | |
// | |
#import <UIKit/UIKit.h> | |
@interface UIColor (UIColor_PXExtensions) | |
+ (UIColor*)pxColorWithHexValue:(NSString*)hexValue; | |
@end |
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// | |
// UIColor+PXExtensions.m | |
// | |
#import "UIColor+UIColor_PXExtensions.h" | |
@implementation UIColor (UIColor_PXExtensions) | |
+ (UIColor*)pxColorWithHexValue:(NSString*)hexValue | |
{ | |
//Default | |
UIColor *defaultResult = [UIColor blackColor]; | |
//Strip prefixed # hash | |
if ([hexValue hasPrefix:@"#"] && [hexValue length] > 1) { | |
hexValue = [hexValue substringFromIndex:1]; | |
} | |
//Determine if 3 or 6 digits | |
NSUInteger componentLength = 0; | |
if ([hexValue length] == 3) | |
{ | |
componentLength = 1; | |
} | |
else if ([hexValue length] == 6) | |
{ | |
componentLength = 2; | |
} | |
else | |
{ | |
return defaultResult; | |
} | |
BOOL isValid = YES; | |
CGFloat components[3]; | |
//Seperate the R,G,B values | |
for (NSUInteger i = 0; i < 3; i++) { | |
NSString *component = [hexValue substringWithRange:NSMakeRange(componentLength * i, componentLength)]; | |
if (componentLength == 1) { | |
component = [component stringByAppendingString:component]; | |
} | |
NSScanner *scanner = [NSScanner scannerWithString:component]; | |
unsigned int value; | |
isValid &= [scanner scanHexInt:&value]; | |
components[i] = (CGFloat)value / 256.0f; | |
} | |
if (!isValid) { | |
return defaultResult; | |
} | |
return [UIColor colorWithRed:components[0] | |
green:components[1] | |
blue:components[2] | |
alpha:1.0]; | |
} | |
@end |
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