{"id":2137,"date":"2015-02-27T14:46:44","date_gmt":"2015-02-27T22:46:44","guid":{"rendered":"http:\/\/www.wellgolly.com\/?p=2137"},"modified":"2015-02-27T14:46:44","modified_gmt":"2015-02-27T22:46:44","slug":"setting-colors-with-an-nsstring","status":"publish","type":"post","link":"https:\/\/www.wellgolly.com\/?p=2137","title":{"rendered":"Setting colors with an NSString"},"content":{"rendered":"

I wanted to color some letters in an NSAttributed string using a random list of colors that I generated. What I wanted to do was something like this:<\/p>\n

\nNSString colorName = [NSString stringWithFormat:@"%@Color", colorList[i] ];\nimageColor = [UIColor colorName];\n<\/code><\/pre>
\nBut you can\u2019t feed an NSString to the UIColor method. Use a selector to do it.
\nLike this:
\n
 \nNSString *colorname = [NSString stringWithFormat:@"%@Color", colorList[i] ];\nSEL labelColor = NSSelectorFromString(colorname);\nUIColor *imageColor = [Utilities uiColorFromColorName:colorname];\nimageColor = [UIColor performSelector:labelColor];\n<\/code><\/pre><\/p>\n
I had to create pink separately since it is not in the Apple supplied color list. However, I don\u2019t really like the other colors so I created a Utility method to create a UIColor from our RGB color values. It generates a UIColor that I can use for my attributed string.<\/p>\n
\nUIColor *imageColor = [Utilities uiColorFromColorName:[lettersExploded[2] lowercaseString] ];\n<\/code><\/pre><\/p>\n
\n+ (UIColor *)uiColorFromColorName:(NSString *)colorName {\n\nUIColor *imageColor = nil;\n\n    if ( [colorName isEqualToString:@"black"] ) {\n        imageColor = [UIColor colorWithRed:0.0f\/255.0f green:0.0f\/255.0f blue:0.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"blue"] ) {\n        imageColor = [UIColor colorWithRed:8.0f\/255.0f green:41.0f\/255.0f blue:247.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"brown"] ) {\n        imageColor = [UIColor colorWithRed:95.0f\/255.0f green:47.0f\/255.0f blue:0.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"gray"] ) {\n        imageColor = [UIColor colorWithRed:140.0f\/255.0f green:140.0f\/255.0f blue:140.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"green"] ) {\n        imageColor = [UIColor colorWithRed:51.0f\/255.0f green:153.0f\/255.0f blue:51.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"orange"] ) {\n        imageColor = [UIColor colorWithRed:255.0f\/255.0f green:116.0f\/255.0f blue:0.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"pink"] ) {\n        imageColor = [UIColor colorWithRed:255.0f\/255.0f green:90.0f\/255.0f blue:148.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"purple"] ) {\n        imageColor = [UIColor colorWithRed:140.0f\/255.0f green:0.0f\/255.0f blue:140.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"red"] ) {\n        imageColor = [UIColor colorWithRed:233.0f\/255.0f green:17.0f\/255.0f blue:0.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"white"] ) {\n        imageColor = [UIColor colorWithRed:255.0f\/255.0f green:255.0f\/255.0f blue:255.0f\/255.0f alpha:1];\n    } else if ( [colorName isEqualToString:@"yellow"] ) {\n        imageColor = [UIColor colorWithRed:255.0f\/255.0f green:255.0f\/255.0f blue:0.0f\/255.0f alpha:1];\n    }\n\n  return imageColor;\n}\n\n<\/code><\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"
I wanted to color some letters in an NSAttributed string using a random list of colors that I generated. What I wanted to do was something like this: NSString colorName = [NSString stringWithFormat:@"%@Color", colorList[i] ]; imageColor = [UIColor colorName]; But you can\u2019t feed an NSString to the UIColor method. Use a selector to do it. … Continue reading Setting colors with an NSString<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-2137","post","type-post","status-publish","format-standard","hentry","category-ios"],"_links":{"self":[{"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=\/wp\/v2\/posts\/2137","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2137"}],"version-history":[{"count":0,"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=\/wp\/v2\/posts\/2137\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2137"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2137"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wellgolly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}