UITextView 属性字符串不变

Question

我正在尝试将属性字符串字体设置为 18。这是代码

NSString *str = [NSString stringWithFormat: @"We notice you've been pre-registrated here. Can you please confirm you are from %@?", visitor.company_name];

NSMutableAttributedString * string = [[NSMutableAttributedString alloc] initWithString:str];


NSRange range = [str.lowercaseString rangeOfString:visitor.company_name.lowercaseString];

[string addAttribute:NSForegroundColorAttributeName value:[UIColor lightGrayColor] range:NSMakeRange(0, str.length)];
[string addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Helvetica-Bold" size:18.0] range:range];

self.textView.attributedText = string;

这只会增加公司名称的大小。字符串大小不会改变原始大小。

Answer 1

这条线救了我一命：

[string addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Helvetica" size:18.0] range:NSMakeRange(0, str.length)];

Answer 2

问题出在定义字符串范围的行上。

NSRange range = NSMakeRange(0,string.length);
[string addAttribute:NSForegroundColorAttributeName value:[UIColor lightGrayColor] range:NSMakeRange(0,string.length)];