使用NSMutableAttributedString加粗字符串

Question

使用以下代碼來加粗字符串的一部分。我只想要Shipment Ref. #:加粗。下面是我的代碼

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]; 

的問題是，它是沒有得到加粗

Answer 1

試試這個代碼

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];