一些疑惑

[summer87279149]

你好 在LCTextSelectedHelper.m中

NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithAttributedString:label.attributedText];
NSRange textRange = NSMakeRange(0, attributedText.length);
[attributedText addAttribute:NSFontAttributeName value:label.font range:textRange];
NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle new];
paragraphStyle.alignment = label.textAlignment;
[attributedText addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:textRange];
[self.textStorage setAttributedString:attributedText];

这些代码 在 NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithAttributedString:label.attributedText];之后，为什么要再增加font和paragraphStyle的富文本样式呢？这些样式在label.attributedText已经包含了，不太明白这里为什么要再写一次，望回复