如图使用苹果机打开文档文字底色会消失，安卓正常

https://jingdaka-doc.oss-cn-shanghai.aliyuncs.com/document/2019/04/15/QPeDFxKhX5EZXBaH2SBzwp6Yi82yZeHZ.docx

"{\"language\":\"en\",\"wifiEnabled\":true,\"bluetoothEnabled\":false,\"deviceOrientation\":\"portrait\",\"locationAuthorized\":true,\"notificationSoundAuthorized\":false,\"screenHeight\":812,\"windowHeight\":724,\"system\":\"iOS 12.2\",\"version\":\"7.0.3\",\"fontSizeSetting\":17,\"notificationAuthorized\":false,\"statusBarHeight\":44,\"windowWidth\":375,\"pixelRatio\":3,\"notificationBadgeAuthorized\":false,\"model\":\"iPhone XS<iPhone11,2>\",\"batteryLevel\":42,\"screenWidth\":375,\"locationEnabled\":true,\"microphoneAuthorized\":true,\"cameraAuthorized\":true,\"albumAuthorized\":true,\"notificationAlertAuthorized\":false,\"brand\":\"iPhone\",\"platform\":\"ios\",\"SDKVersion\":\"2.6.6\"}",