UILabel 中的 HTML 文本
NSString * htmlString = @"<html><body> <b> Example bold text in HTML </b> </body></html>";
NSAttributedString * attrStr = [[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
UILabel * yourLabel = [[UILabel alloc] init];
yourLabel.attributedText = attrStr;