安卓苹果如何判断推送权限是否开启，未开启跳转到设置页面去

实现效果：
检查安卓和苹果是否具有推送通知权限，若没有权限则跳转到设置页面去

judgePushPermision(function(res){
if(res){
console.log("具有通知权限")
}else{
console.log("不具有通知权限");
toSystemAppPage(); //跳转到设置页面去
}
})

//判断用户是否具有推送通知权限
judgePushPermision(call){
// #ifdef APP-PLUS
let _this = this;
let system = uni.getSystemInfoSync();
if(system.platform == "ios"){
var UIApplication = plus.ios.import("UIApplication");
var app = UIApplication.sharedApplication();
var enabledTypes = 0;
if (app.currentUserNotificationSettings) {
var settings = app.currentUserNotificationSettings();
enabledTypes = settings.plusGetAttribute("types");
} else {
//针对低版本ios系统
enabledTypes = app.enabledRemoteNotificationTypes();
}
plus.ios.deleteObject(app);
if ( enabledTypes == 0 ) {
call && call(false);
}else{
call && call(true);
}
}else{
let main = plus.android.runtimeMainActivity();
let pkName = main.getPackageName();
let NotificationManagerCompat = plus.android.importClass("androidx.core.app.NotificationManagerCompat");/此处注意哈：若hbuilderx版本是使用的3.2.5以前的，则这里引入的包名更换为：android.support.v4.app.NotificationManagerCompat/
let packageNames = NotificationManagerCompat.from(main);
if (packageNames.areNotificationsEnabled()) {
call && call(true);
}else{
call && call(false);
}
}
// #endif
},

//前往系统设置的app页，打开推送  
toSystemAppPage(){  
    // #ifdef APP-PLUS  
    let _this = this;  
    let system = uni.getSystemInfoSync();  
    if(system.platform == "ios"){  
        var UIApplication = plus.ios.import("UIApplication");  
        var NSURL = plus.ios.import("NSURL");    
        var setting = NSURL.URLWithString("app-settings:");    
        var application = UIApplication.sharedApplication();    
        application.openURL(setting);    
        plus.ios.deleteObject(setting);    
        plus.ios.deleteObject(application);    
    }else{  
        let main = plus.android.runtimeMainActivity();  
        let pkName = main.getPackageName();    
        let Intent = plus.android.importClass('android.content.Intent');  
        let intent = new Intent('android.settings.APP_NOTIFICATION_SETTINGS');//可设置表中所有Action字段    
        intent.putExtra('android.provider.extra.APP_PACKAGE', pkName);    
        main.startActivity(intent);  
    }  
    // #endif  
}