iOS/iPhone/iPad, Objective-C/Apple Development, Programming/Computer cocoa, code, ipad, iphone, mac, objective-c, programming, software 2 Comments
Until I find a home for my little snippets of code, here is where they will go.
While building an iOS (iPhone) application, I needed a quick little method in Objective-c that would take strings of color codes from data provided by web developer peeps and convert those string values into UIColor objects. For instance, sometimes we’d get “#ff7401″ from the data for our app. Sometimes it might be formatted like, “0xff7401″ or even just, “ff7401″. I simply created a category on NSString to make is super-simple.
NSString+meltutils.h
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// UIColor+meltutils.h // Created by Andy Frey on 10/15/10. #import <Foundation/Foundation.h> @interface NSString (meltutils) - (UIColor *)toUIColor; @end |
NSString+meltutils.m
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#import "NSString+meltutils.h" @implementation NSString (meltutils) - (UIColor *)toUIColor { unsigned int c; if ([self characterAtIndex:0] == '#') { [[NSScanner scannerWithString:[self substringFromIndex:1]] scanHexInt:&c]; } else { [[NSScanner scannerWithString:self] scanHexInt:&c]; } return [UIColor colorWithRed:((c & 0xff0000) >> 16)/255.0 green:((c & 0xff00) >> 8)/255.0 blue:(c & 0xff)/255.0 alpha:1.0]; } @end |
So, to use this, all you have to do is import the header file and send a message to your string that contains the color code:
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#import "NSString+meltutils.h" ... UIColor *c = [@"#ff840a" toUIColor]; ... |
Hope that helps someone out a little!