How do you add CSS with Javascript?
https://stackoverflow.com/questions/707565/how-do-you-add-css-with-javascript
https://stackoverflow.com/questions/707565/how-do-you-add-css-with-javascript
https://www.jianshu.com/p/f207b8ed67f6
https://www.jianshu.com/p/52c757747866
let source = """
var styles = `.netless-whiteboard div.editor-box{border: none ;border-color: transparent;}.netless-whiteboard div.editor-box >.operation-point-touch{display: none !important;}.netless-whiteboard div.editor-box >.operation-point-touch.right-bottom.RB{display: block !important;background: url('https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=4065216088,3626560770&fm=26&gp=0.jpg') no-repeat right bottom;height: 24px !important;width: 24px !important;background-size: 100%;background-color: transparent !important;bottom: 4px;right: 4px;}.netless-whiteboard div.editor-box >.operation-point-touch.right-bottom.RB div{display:none;}.cursor-box{border: none !important;border-radius: 0;background:url('https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=4065216088,3626560770&fm=26&gp=0.jpg') no-repeat !important;}.cursor-box img, .cursor-box-tool{display: none;}`
var styleSheet = document.createElement("style")
styleSheet.type = "text/css"
styleSheet.innerText = styles
document.head.appendChild(styleSheet)
"""
let userScript = WKUserScript(source: source,
injectionTime: .atDocumentEnd,
forMainFrameOnly: true)
let userContentController = WKUserContentController()
userContentController.addUserScript(userScript)
let preferences = WKPreferences()
preferences.javaScriptEnabled = true
// prefere
let configuration = WKWebViewConfiguration()
configuration.userContentController = userContentController
configuration.preferences = preferences
self.boardView = WhiteBoardView(frame: .zero,configuration: configuration)
self.boardView?.navigationDelegate = self
