在iOS中具有可编辑段落的WKWebView中光标的位置

webView.isEditable = true

var range = window.getSelection().getRangeAt(0);
var offset = range.startOffset;
offset;

var range = document.createRange();
var sel = window.getSelection();
range.setStart(node, offset);
range.collapse(true);
sel.removeAllRanges();
sel.addRange(range);

webView.evaluateJavaScript("var range = window.getSelection().getRangeAt(0); var offset = range.startOffset; offset;") { (result, error) in
    if let offset = result as? Int {
        // 在这里处理光标位置
    }
}

let javascript = "var range = document.createRange(); var sel = window.getSelection(); range.setStart(node, offset); range.collapse(true); sel.removeAllRanges(); sel.addRange(range);"
webView.evaluateJavaScript(javascript, completionHandler: nil)