UIWebView控件中字体大小和字体样式的修改

NSString *htmlString = [NSString stringWithContentsOfFile:self.webPath encoding:NSUTF8StringEncoding error:nil];

UIFont *font = [UIFont systemFontOfSize:12];

NSString *newHtmlString = [NSString stringWithFormat:@"%@", font.fontName,htmlString];

[self.myWebView loadHTMLString:newHtmlString baseURL:[NSURL URLWithString:self.webPath]];

NSString *str = @"document.getElementsByTagName('body')[0].style.webkitTextSizeAdjust= ླྀ%'";

[self.myWebView stringByEvaluatingJavaScriptFromString:str];