let markdown = "# Hello"
var html = ""
do {
    html = try EFMarkdown().markdownToHTML(markdown, options: EFMarkdownOptions.safe)
    print(html) // This will return "<h1>Hello</h1>\n"
} catch let error as NSError {
    print ("Error: \(error.domain)")
}

let screenSize = UIScreen.main.bounds
let markView = EFMarkdownView()
markView.frame = CGRect(x: 0, y: 20, width: screenSize.width, height: screenSize.height - 20)
markView.onRendered = {
    [weak self] (height) in
    if let _ = self {
        // Optional: you can know the change of height in this block
        print("onRendered height: \(height ?? 0)")
    }
}
self.view.addSubview(markView)
markView.load(markdown: testMarkdownFileContent(), options: [.default]) {
    [weak self] (_, _) in
    if let _ = self {
        // Optional: you can change font-size with a value of percent here
        markView.setFontSize(percent: 128)
        printLog("load finish!")
    }
}