使用NSMutableAttributedString粗体显示字符串

Question

Im using the following code to bold a part of string. I want only the Shipment Ref. #: Shipment Ref. #: to be bolded. Following is my code

  UIFont *boldFont = [UIFont boldSystemFontOfSize:12];
    NSString *yourString = [NSString stringWithFormat:@"Shipment Ref. #: %@ ",[[[NSUserDefaults alloc] init] valueForKey:@"shipRef"]];
    NSRange boldedRange = NSMakeRange(10, 4);

    NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:yourString];

    [attrString beginEditing];
    [attrString addAttribute:NSFontAttributeName
                       value:boldFont
                       range:boldedRange];

    [attrString endEditing];
    self.shipRefHeader.text = [attrString mutableString];

The problem is that it is not getting bolded

Answer 1

try this code

    NSString * yourString = [NSString stringWithFormat:@"Shipment Ref. #: %@ ",[[[NSUserDefaults alloc] init] valueForKey:@"shipRef"]];;
    NSMutableAttributedString * attrString = [[NSMutableAttributedString alloc] initWithString:yourString];
    NSString *boldString = @"Shipment Ref. #:";
    NSRange boldRange = [yourString rangeOfString:boldString];
    [attrString addAttribute: NSFontAttributeName value:[UIFont boldSystemFontOfSize:12] range:boldRange];
    [self.shipRefHeader setAttributedText: attrString];