WebView设置字体颜色, 字体大小,背景

1.第一种方式：在WebView的代理方法webViewDidFinishLoad中：

字体大小： [webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName(‘body‘)[0].style.webkitTextSizeAdjust= ‘12%‘"];

字体颜色：[webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName(‘body‘)[0].style.webkitTextFillColor= ‘green‘"];

背景颜色：[webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName(‘body‘)[0].style.background=‘#F6F7F3‘"];

2.第一种方式：在下面可以通过改变margin大小来改变webview文字距离边距大小，13代表字体大小，self.strBookTips是要被操作的字符串。

NSString *BookStr = [NSString stringWithFormat:@"<html> "

"<head> "

"<style type="text/css"> "

"body {margin:10;font-size: %d;} "

"</style> "

"</head> "

"<body>%@</body> "

"</html>",13,self.strBookTips];

[self.webView loadHTMLString:BookStr baseURL:nil];

3.第三种方式，这种缺少了改变背景颜色

NSString * formatString = @"<span style="font-size:13px;color:#7E7C8A">%@</span>";

NSString * htmlString = [NSString stringWithFormat:formatString,self.strBookTips];

[self.webView loadHTMLString:BookStr baseURL:nil];