iOS 10.3中的WebView字体不正确

<style>
    body {
        font-family: "Helvetica Neue", Arial, sans-serif;
    }
</style>

<script>
    document.body.style.fontFamily = "Helvetica Neue, Arial, sans-serif";
</script>

import WebKit

// 创建一个WKWebViewConfiguration对象
let configuration = WKWebViewConfiguration()

// 创建一个WKWebsiteDataStore对象
let dataStore = WKWebsiteDataStore.default()

// 清除所有缓存数据
dataStore.fetchDataRecords(ofTypes: WKWebsiteDataStore.allWebsiteDataTypes()) { records in
    dataStore.removeData(ofTypes: WKWebsiteDataStore.allWebsiteDataTypes(), for: records) {
        // 缓存清除完成后，创建一个新的WKWebView对象
        let webView = WKWebView(frame: CGRect(x: 0, y: 0, width: 320, height: 480), configuration: configuration)
        // 加载WebView页面
        webView.load(URLRequest(url: URL(string: "https://example.com")!))
    }
}