iOS - UITextView 显示html

1.展示包含html的文字：

NSAttributedString * attrStr = [[NSAttributedString alloc] initWithData:[str dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
 self.contentTextView.attributedText = attrStr;

2.计算包含html的文字的高度：

CGFloat h = [attrStr boundingRectWithSize:CGSizeMake(ScreenWidth-75-20, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin context:nil].size.height + 10;

3.获取文字中链接的点击事件：

self.contentTextView.delegate = self;

代理方式：

- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange {

    NSLog(@"点击链接-%@",URL);
    
    return YES;
}