var isIos
// #ifdef APP-PLUS
isIos = (plus.os.name == "iOS")
// #endif

// 判断推送权限是否开启 ios
function judgeIosPermissionPush() {
    if (isIos) { //ios
        var result = false;
        var UIApplication = plus.ios.import("UIApplication");
        var app = UIApplication.sharedApplication();
        var enabledTypes = 0;
        if (app.currentUserNotificationSettings) {
            var settings = app.currentUserNotificationSettings();
            enabledTypes = settings.plusGetAttribute("types");
            console.log("enabledTypes1:" + enabledTypes);
            if (enabledTypes == 0) {
                // gotoAppPermissionSetting()
                console.log("推送权限没有开启");
            } else {
                result = true;
                console.log("已经开启推送功能!")
            }
            plus.ios.deleteObject(settings);
        } else {
            enabledTypes = app.enabledRemoteNotificationTypes();
            if (enabledTypes == 0) {
                // gotoAppPermissionSetting()
                console.log("推送权限没有开启!");
            } else {
                result = true;
                console.log("已经开启推送功能!")
            }
            console.log("enabledTypes2:" + enabledTypes);
        }
        plus.ios.deleteObject(app);
        plus.ios.deleteObject(UIApplication);
        return result;
    } else { //android
        var result = false
        var main = plus.android.runtimeMainActivity();
        var pkName = main.getPackageName();
        var uid = main.getApplicationInfo().plusGetAttribute("uid");
        var NotificationManagerCompat = plus.android.importClass("androidx.core.app.NotificationManagerCompat")
        //("android.support.v4.app.NotificationManagerCompat");
        var areNotificationsEnabled = NotificationManagerCompat.from(main)
        // 未开通‘允许通知’权限，则弹窗提醒开通，并点击确认后，跳转到系统设置页面进行设置  
        if (!areNotificationsEnabled.areNotificationsEnabled()) {
            uni.showModal({
                title: '提示',
                content: '请先打开APP通知权限',
                showCancel: false,
                success: function (res) {
                    if (res.confirm) {
                        var Intent = plus.android.importClass('android.content.Intent');
                        var Build = plus.android.importClass("android.os.Build");
                        //android 8.0引导  
                        if (Build.VERSION.SDK_INT >= 26) {
                            var intent = new Intent('android.settings.APP_NOTIFICATION_SETTINGS');
                            intent.putExtra('android.provider.extra.APP_PACKAGE', pkName);
                        } else if (Build.VERSION.SDK_INT >= 21) { //android 5.0-7.0  
                            var intent = new Intent('android.settings.APP_NOTIFICATION_SETTINGS');
                            intent.putExtra("app_package", pkName);
                            intent.putExtra("app_uid", uid);
                        } else { //(<21)其他--跳转到该应用管理的详情页
                            var Settings = plus.android.importClass("android.provider.Settings");
                            var Uri = plus.android.importClass("android.net.Uri");
                            var intent = new Intent();
                            intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                            var uri = Uri.fromParts("package", main.getPackageName(), null);
                            intent.setData(uri);
                        }
                        // 跳转到该应用的系统通知设置页  
                        main.startActivity(intent);
                        return result
                    }
                }
            });
        } else {
            result = true
            return result
        }
    }
}
```直接使用即可，根据返回的 true 或false判断是否开启