Ios -[NSAttributedString boundingRectWithSize]rect错误于html

如果html元素是

或

则rect将是错误的

如果html元素是

，则rect是正确的

例如

代码：

---

您还需要传递标志

nsStringDrawingUserFontLeading

，以考虑使用的字体

类似这样的内容（第41行）：

CGRect rect = [str boundingRectWithSize:CGSizeMake(200, CGFLOAT_MAX)
options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading
context:NULL];

NSRange tailRange = NSMakeRange(attributedString.length - 1, 1);
if (attributedString.length > 1 &&
    [[[attributedString attributedSubstringFromRange:tailRange] string] isEqualToString:@"\n"]) {
    [attributedString replaceCharactersInRange:tailRange withString:@""];
}

CGRect rect = [self.attributeString boundingRectWithSize:CGSizeMake(width,     CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading context:NULL];

ceilf(rect.size.height);