después de anotar no se puede eliminar el texto anotado en ios usando webview

 "var annotation;\n" + "var json =" + annotation + ";\n" + "annotation = $('#htmlreadingcontent').annotator();\n" + " annotation.annotator('addPlugin', 'Touch', {\n" + " force: location.search.indexOf('force') > -1,\n" + " useHighlighter: location.search.indexOf('highlighter') > -1\n" + "