I'd suggest to create a category on NSString with a method that converts it to NSAttributedString and then use that helper method across your project.
Like this:
@interface NSString (AttributedStringCreation)
- (NSAttributedString *)attributedString;
@end
@implementation NSString (AttributedStringCreation)
- (NSAttributedString *)attributedString {
return [[NSAttributedString alloc] initWithString:self];
}
@end