Android（安卓）IOS（苹果）判断是否开启通知权限

在首页onLoad调用permissions()方法；

this.permissions();

permissions()方法具体代码：

//判断是否有通知权限
            permissions () {
                // #ifdef APP-PLUS  
                if (plus.os.name == 'Android') {  // 判断是Android
                    var main = plus.android.runtimeMainActivity();
                    var pkName = main.getPackageName();
                    var uid = main.getApplicationInfo().plusGetAttribute("uid");
                    var NotificationManagerCompat = plus.android.importClass("android.support.v4.app.NotificationManagerCompat");
                    if (NotificationManagerCompat == null){ 
                        NotificationManagerCompat = plus.android.importClass("androidx.core.app.NotificationManagerCompat"); 
                    }
                    var areNotificationsEnabled = NotificationManagerCompat.from(main).areNotificationsEnabled();
                    // 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  
                    //console.log("通知状态",areNotificationsEnabled);
                    if (!areNotificationsEnabled) {
                        uni.showModal({
                            title:'通知权限开启提醒',
                            content:'您还没有开启通知权限，无法接受到消息通知，是否前往设置？',
                            confirmText:'去设置',
                            success: (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  
                                        intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                                        var uri = Uri.fromParts("package", mainActivity.getPackageName(), null);
                                        intent.setData(uri);
                                    }
                                    // 跳转到该应用的系统通知设置页  
                                    main.startActivity(intent);
                                }
                            }
                        })
                    }
                } else if (plus.os.name == 'iOS') {   // 判断是ISO
                    var isOn = undefined;
                    var types = 0;
                    var app = plus.ios.invoke('UIApplication', 'sharedApplication');
                    var settings = plus.ios.invoke(app, 'currentUserNotificationSettings');
                    if (settings) {
                        types = settings.plusGetAttribute('types');
                        plus.ios.deleteObject(settings);
                    } else {
                        types = plus.ios.invoke(app, 'enabledRemoteNotificationTypes');
                    }
                    plus.ios.deleteObject(app);
                    isOn = (0 != types);
                    if (isOn == false) {
                        uni.showModal({
                            title:'通知权限开启提醒',
                            content:'您还没有开启通知权限，无法接受到消息通知，是否前往设置？',
                            confirmText:'去设置',
                            success: (res) => {
                                if(res.confirm){
                                    var app = plus.ios.invoke('UIApplication', 'sharedApplication');
                                    var setting = plus.ios.invoke('NSURL', 'URLWithString:', 'app-settings:');
                                    plus.ios.invoke(app, 'openURL:', setting);
                                    plus.ios.deleteObject(setting);
                                    plus.ios.deleteObject(app);
                                }
                            }
                        })
                    }
                }
                // #endif  
            },