如何调用返回NSMutableAttributedString的方法

Question

I have create a method which I would like to create a NSMutableAttributedString that is partly bolded. However I am having some trouble calling it to return the data that it should.

This is how I have implements the code

//.h
// creates bold portion of the labels in toolbar
- (NSMutableAttributedString *)createBoldString:(NSString *)labelString intRangeA:(int)rangeA intRangeB:(int)rangeB;





//.m

       - (NSMutableAttributedString *)createBoldString:(NSString *)labelString intRangeA:(int)rangeA intRangeB:(int)rangeB {
            // iOS6 and above : Use NSAttributedStrings
            const CGFloat fontSize = 12;
            UIFont *boldFont = [UIFont boldSystemFontOfSize:fontSize];
            UIFont *regularFont = [UIFont systemFontOfSize:fontSize];
            UIColor *foregroundColor = [UIColor whiteColor];

            // Create the attributes
            NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys:
                                   boldFont, NSFontAttributeName,
                                   foregroundColor, NSForegroundColorAttributeName, nil];
            NSDictionary *subAttrs = [NSDictionary dictionaryWithObjectsAndKeys:
                                      regularFont, NSFontAttributeName, nil];
            const NSRange range = NSMakeRange(rangeA, rangeB); // range of " 2012/10/14 ". Ideally this should not be hardcoded

            // Create the attributed string (text + attributes)
            NSMutableAttributedString *attributedText =
            [[NSMutableAttributedString alloc] initWithString:labelString
                                                   attributes:attrs];
            [attributedText setAttributes:subAttrs range:range];

            // Set it in our UILabel and we are done!
            return attributedText;
        //    [firstToolBarLabel setAttributedText:attributedText];
        }

and this is how I am trying to call it without sucsess

NSAttributedString *firstAttr = [[NSAttributedString alloc] init];
    [firstAttr create.... // this dose not auto complete and I cannot see the method

I dont know why but I cannot use the method I created. Am I doing it right? is there a different way to pass the data back or am i missing something

any help would be appreciated.

Answer 1

You want to call [self create...] , not [firstAttr create... ]. Your create... method is an instance method of your object (self). It returns an attributed string, but it is not a method of the attributed string class.