i want track my app status, i.e app is moving or stationary, I am using this module for location
https://github.com/mauron85/react-native-background-geolocation
for check the status of location i used this function
BackgroundGeolocation.on('stationary', (stationaryLocation) => {
console.log("stationaryLocation:"+JSON.stringify(stationaryLocation))
});
but it is not showing any response when i am stationary, can any one give me suggestion that how to resolve this.
Any help much appreciated.
Instead of using GeoLocation, you can use CMMotionActivityManager to track this.
public func getCurrentActivity(onRun:#escaping (_ activity: String?) -> Void) {
if(CMMotionActivityManager.isActivityAvailable()){
let mainQ = OperationQueue.main
self.activityManager?.startActivityUpdates(to: mainQ, withHandler: { (data: CMMotionActivity!) -> Void in
DispatchQueue.main.async(execute: {
var action = ""
if(data.stationary == true){
action = "Stationary"
} else if (data.walking == true){
action = "Walking"
} else if (data.running == true){
action = "Running"
} else if (data.automotive == true){
action = "Automotive"
} else if (data.cycling == true){
action = "cycling"
} else {
action = "Stationary"
}
onRun(action)
})
})
}
}
Related
import SwiftUI
struct ReserveView: View {
#State var searchT = ""
#State var isSearching = false
#State private var showCheckAlert = false
#Binding var roomnum:Int
#StateObject private var vm = ReserveViewModel(
service: ReserveService()
)
var body: some View {
VStack{
HStack{
TextField("Search", text:$searchT)
.padding(.leading, 30)
}
.padding()
.background(Color.gray.opacity(0.2))
.cornerRadius(6)
.padding(.horizontal)
.onTapGesture(perform: {
isSearching = true
})
.overlay(
HStack {
Image(systemName: "magnifyingglass")
Spacer()
}.padding(.horizontal,32)
.foregroundColor(.white)
)
if isSearching {
Button(action:{
isSearching = false
searchT = ""
UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for:nil)
}, label: {
Text("Cancle")
.padding(.trailing)
.padding(.leading,0)
})
.transition(.move(edge: .trailing))
}
switch vm.state{
case .success(let data):
List{
ForEach((data).filter({"\($0)".contains(searchT)||searchT.isEmpty}),
id: \.roomnum){ item in
HStack{
Text("\(item.when) \(item.time) \(item.username)").foregroundColor(Color.black)
}
}
}
.padding(.bottom,15)
//.padding(.top,20)
case .loading:
ProgressView()
default:
EmptyView()
}
}
.task {
await vm.getReserves()
}
}
}
struct ReserveView_Previews: PreviewProvider {
static var previews: some View {
ReserveView(roomnum:.constant(""))
}
}
import Foundation
import SwiftUI
struct ReserveService {
enum ReserveListError: Error {
case failed
case failedToDecode
case invalidStatusCode
}
func fetchReserves() async throws -> [Reserve] {
let url = URL(string: "https://f6d3-119-203-102/roomreserveview?roomnum=\(here i want use variable)")!
let configuration = URLSessionConfiguration.ephemeral
print(url)
let (data, response) = try await URLSession(configuration: configuration).data(from: url)
guard let response = response as? HTTPURLResponse,
response.statusCode == 200 else{
throw ReserveListError.invalidStatusCode
}
let decodedData = try JSONDecoder().decode(ReserveServiceResult.self, from: data)
return decodedData.reserveInfo
}
}
import SwiftUI
import Foundation
#MainActor
class ReserveViewModel: ObservableObject {
enum State {
case na
case loading
case success(data: [Reserve])
case failed(error: Error)
}
#Published private(set) var state: State = .na
#Published var hasError: Bool = false
private let service: ReserveService
init(service: ReserveService) {
self.service = service
}
func getReserves() async {
self.state = .loading
self.hasError = false
do {
let reserves = try await service.fetchReserves()
self.state = .success(data: reserves)
}catch {
self.state = .failed(error: error)
self.hasError = true
print(String(describing: error))
}
}
}
hello! I'd like to ask you a SwiftUI question.
Based on the ReserveService file, I am implementing the part that lists and displays the desired data in ReserveView.
I want to complete the url in the 'fetchReserves' function by receiving the variable 'roomnum' from the ReserveView model to the ReserveService.
However, Binding does not seem to work because ReserveService is not a view model. Is there any way I can get this variable from the viewmodel?
If you don't understand my explanation, please ask the question again.
This is my first time asking a question. Please forgive me if there is something missing in my question
It is possible to inject it as function argument, like
func fetchReserves(_ roomnum: Int) async throws -> [Reserve] {
let url = URL(string:
"https://f6d3-119-203-102/roomreserveview?roomnum=\(roomnum)")!
i have the following code in which i'm trying to download exchange rates into my app to use in currency conversion.
The data fetch seems to work ok, as does the json decoding model, but i'm unable to get the data through the Rates variable
import SwiftUI
struct ExchangeRates: Codable {
var conversionRates: [String: Double]?
init(conversionRates:[String:Double]) {
self.conversionRates = conversionRates
}
enum CodingKeys: String, CodingKey {
case conversionRates = "conversion_rates"
}
}
class DownloadingData:ObservableObject{
#Published var Rates:ExchangeRates = ExchangeRates.init(conversionRates: ["test" : 0])
init() {
datatask()
}
func datatask() {
guard let url = URL(string: "https://v6.exchangerate-api.com/v6/********************/latest/GBP") else {return}
URLSession.shared.dataTask(with: url){(data,response,error) in
guard let data = data else {
print("no data")
return
}
guard error == nil else {
print("error :\(String(describing: error))")
return
}
guard let response = response as? HTTPURLResponse else {
print("invalid response")
return
}
guard response.statusCode >= 200 && response.statusCode < 300 else {
print("status code should be 2xx, but is \(response.statusCode)")
return
}
guard let rates = try? JSONDecoder().decode(ExchangeRates.self, from: data) else {return}
print(rates) **// this works and prints out data**
DispatchQueue.main.async {
[weak self] in
self?.Rates = rates
print(self?.Rates) **// this works and prints out the data**
}
print(self.Rates) **// this doesnt print out anything**
}.resume()
print(Rates) **// this doesnt print out anything**
}
}
i can't seem to get the data into the Rates Variable
any guidance please
thanks
here is a sample of the console output :
ExchangeRates(conversionRates: Optional(["test": 0.0]))
Optional(test3.ExchangeRates(conversionRates: Optional(["BZD": 2.7002, "PHP": 68.7948, "PGK": 4.725, "BND": 1.8176, "HNL": 32.8885, "TND": 3.7553, "BDT": 115.2218, "SBD": 10.6866, "NIO": 47.4824, "XDR": 0.963, "IDR": 19213.9064, "XCD": 3.6453, "CAD": 1.7152, "UGX": 4778.6135,])
you could try this, using your ExchangeRates struct:
class DownloadingData: ObservableObject{
#Published var rates = ExchangeRates(conversionRates: ["test" : 0])
init() {
datatask()
}
func datatask() {
guard let url = URL(string: "https://v6.exchangerate-api.com/v6/********************/latest/GBP") else {return}
URLSession.shared.dataTask(with: url){(data,response,error) in
guard let data = data else {
print("no data")
return
}
guard error == nil else {
print("error :\(error)")
return
}
guard let response = response as? HTTPURLResponse else {
print("invalid response")
return
}
guard response.statusCode >= 200 && response.statusCode < 300 else {
print("status code should be 2xx, but is \(response.statusCode)")
return
}
guard let exRates = try? JSONDecoder().decode(ExchangeRates.self, from: data) else {return}
print(exRates)
DispatchQueue.main.async {
self.rates = exRates // <--- here
print(self.rates) // <--- here
}
// print(self.rates) // <--- NEVER here
}.resume()
}
}
EDIT-1: with completion closure:
class DownloadingData: ObservableObject{
#Published var rates = ExchangeRates(conversionRates: ["test" : 0])
init() {
datatask() { isDone in
print(self.rates) // <--- here OK
}
}
func datatask(completion: #escaping(Bool) -> ()) { // <--- here
guard let url = URL(string: "https://v6.exchangerate-api.com/v6/********************/latest/GBP") else {return}
URLSession.shared.dataTask(with: url){(data,response,error) in
guard let data = data else {
print("no data")
return
}
guard error == nil else {
print("error :\(error)")
return
}
guard let response = response as? HTTPURLResponse else {
print("invalid response")
return
}
guard response.statusCode >= 200 && response.statusCode < 300 else {
print("status code should be 2xx, but is \(response.statusCode)")
return
}
guard let exRates = try? JSONDecoder().decode(ExchangeRates.self, from: data) else {return}
print(exRates) // <--- here OK
DispatchQueue.main.async {
self.rates = exRates
print(self.rates) // <--- here OK
completion(true) // <--- here return completion
}
}.resume()
}
}
Declare rates – please with starting lowercase letter – as empty dictionary
#Published var rates = [String:Double]()
In the struct delete the init method and declare the dictionary also non-optional
struct ExchangeRates: Decodable {
let conversionRates: [String: Double]
enum CodingKeys: String, CodingKey {
case conversionRates = "conversion_rates"
}
}
in the DispatchQueue closure assign the value of conversionRates to rates
DispatchQueue.main.async { // no weak self needed
self.rates = rates.conversionRates
}
In the view enumerate the dictionary rates
Scenario
Our app aims to detect beacons placed inside the restaurants our app
uses react-native-beacons-manager
When our app detects a beacon, I have developed a cloud function that accepts the beacon's major key and use it to query data of that restaurant from my database
The Cloud function then sends a push notification on the user about the restaurant details.
The Problem
The way I detect the beacons is not stable. this is my flow. I created a function located at
this.beaconsDidRangeEvent = Beacons.BeaconsEventEmitter.addListener(
//function-here
);
I can receive the beacons information like uuid, major and minor key and proximity (immediate, near, far, unknown) . Now inside that function I use the major key to determine the individuality of each beacons. Now, I've made a condition like this:
let beaconArr = data.beacons;
console.log(beaconArr);
console.log(count);
if (beaconArr.length > 0) {
console.log("beacons detected!");
let major = data.beacons[0].major;
let prox = data.beacons[0].proximity;
if ((prox === "near" || prox === "far") && beaconFlag === false && count === 0) {
console.log("beacon Action");
this.props.beaconAction(major);
this.props.createCheckInHistory(user.uid);
beaconFlag = true;
count++;
} else {
console.log("counter turned to 1!");
console.log(data);
beaconFlag = true;
}
} else {
console.log("no beacons detected!");
count = 0;
beaconFlag = false;
}
Expected Result
I expect that the functions inside the condition is true will only fire once.
Actual Result
Sometimes, its ok sometimes its not. even if im still at the range of the beacon, suddenly the beacon's array got 0. Then suddenly i'll receive a push notification again and again.
componentDidMount() Code
componentDidMount() {
this.props.selectedIcon('map');
firebase
.messaging()
.getInitialNotification()
.then(notification => {
console.log("Notification which opened the app: ", notification);
});
const user = firebase.auth().currentUser;
let count = 0;
let beaconFlag = false;
// will be set as a reference to "regionDidEnter" event:
this.beaconsDidRangeEvent = Beacons.BeaconsEventEmitter.addListener(
"beaconsDidRange",
_.throttle(data => {
let beaconArr = data.beacons;
console.log(beaconArr);
console.log(count);
if (beaconArr.length > 0) {
console.log("beacons detected!");
let major = data.beacons[0].major;
let prox = data.beacons[0].proximity;
if ((prox === "near" || prox === "far") && beaconFlag === false && count === 0) {
console.log("beacon Action");
this.props.beaconAction(major);
this.props.createCheckInHistory(user.uid);
beaconFlag = true;
count++;
} else {
console.log("counter turned to 1!");
console.log(data);
beaconFlag = true;
}
} else {
console.log("no beacons detected!");
count = 0;
beaconFlag = false;
}
}, 3000)
);
// monitoring events
this.regionDidEnterEvent = Beacons.BeaconsEventEmitter.addListener(
"regionDidEnter",
data => {
console.log("monitoring - regionDidEnter data: ", data);
}
);
// Monitoring: Listen for device leaving the defined region
this.regionDidExitEvent = Beacons.BeaconsEventEmitter.addListener(
"regionDidExit",
data => {
console.log("monitoring - regionDidExit data: ", data);
}
);
}
This is a common problem when ranging in beacon apps. Sometimes the detected beacons will briefly drop out then come back again. This can be solved by a software filter where you keep track of all beacons you have recently seen, and only perform an operation of it has not happened recently. In your case, you may use the major as the key to the index into the filter object.
// scope this globally
var minimumRetriggerMillis = 3600 * 1000; // 1hr
var recentTriggers = {};
// Before executing your trigger action:
var now = new Date().getTime();
if (recentTriggers[minor] == null || now-recentTriggers[minor] > minimumRetriggerMillis) {
recentTriggers[minor] = now;
// TODO: execute trigger logic here
}
I'm trying to combine observables and I want them to run in sequence (e.g., perform step 1, if some condition is met then perform step 2, if some condition is met then perform step 3). The only way I've found to do this is to add the conditions to each step, which I'm not a fan of: Here's a sample of my current solution:
enum Status {
case unknown, exists, missing
}
func refresh() -> Observable<Status> {
return checkLocalStatus()
.flatMapLatest { $0 == .exists ? Observable.just($0) : self.attemptRemoteStatusOverride() }
.flatMapLatest { $0 == .exists ? Observable.just($0) : self.attemptRemoteStatusUpdate() }
}
private func checkLocalStatus() -> Observable<Status> {
return Observable.create { observer in
// Regarding Maxim Volgin's comment, here I'm converting a closure to an
// observable... why not use Observable.create?
self.cache.status { (status) in
guard status != .exists else {
observer.onNext(status) // .exists
observer.onCompleted()
}
/* I don't want this condition to be here */
if ignoreRemote {
// status is !exists and we should ignore remote, throw error
observer.onError(Errors.remoteDisabled)
}
observer.onNext(.missing)
observer.onCompleted()
}
}
}
private func attemptRemoteStatusOverride() -> Observable<Status> {
return remote.statusOverride()
}
private func attemptRemoteStatusUpdate() -> Observable<Status> {
return Observable.create { observer in
// Regarding Maxim Volgin's comment, here I'm converting a closure to an
// observable... why not use Observable.create?
self.remote.updateStatus { (status, error) in
guard error == nil else {
observer.onError(error!)
}
observer.onNext(status)
observer.onCompleted()
}
}
}
I'd like to do something like:
func refresh() -> Observable<Status> {
return checkLocalStatus()
.if({ $0 != .exists && !ignoreRemote },
then: { self.attemptRemoteStatusOverride() },
else: { return $0 })
.if({ $0 != .exists },
then: { self.attemptRemoteStatusUpdate() },
else: { return $0 })
}
or
func refresh() -> Observable<Status> {
return checkLocalStatus()
.flatMapLatest(if: { $0 != .exists && !ignoreRemote }) { self.attemptRemoteStatusOverride() }
.flatMapLatest(if: { $0 != .exists }) { self.attemptRemoteStatusUpdate() }
}
I haven't been able to find anything like what I'm attempting, so I assume I'm going about this wrong. Does anyone have suggestions or alternatives on how to go about this route of combining observables? I've seen examples using combineLatest and returning some results based on the result of something else, but I want to perform each step only if a condition is met. combineLatest would perform each step (every time) and then I would return the result(s) of some steps based on the output of other steps. I also started looking into writing a custom operator, but can't figure a way to do it.
Update: I've changed to the following and plan to write a method to remove duplication:
func refresh() -> Observable<Status> {
return checkLocalStatus()
.flatMapLatest { status -> Observable<Status>
guard status != .exists && !ignoreRemote else {
return Observable.just(status)
}
return self.attemptRemoteStatusOverride()
}
.flatMapLatest { status -> Observable<Status>
guard status != .exists && !ignoreRemote else {
return Observable.just(status)
}
return self.attemptRemoteStatusUpdate()
}
}
Maybe you need some version of flatMapLatest function with conditions? You can make some function that does what you want with the syntax you want:
extension Observable {
func flatMapLatest(condition: #escaping (E) -> Bool, then: #escaping (E) -> Observable, otherwise: #escaping () -> Observable) -> Observable {
let observable = self.shareReplayLatestWhileConnected()
let observableCondition = observable.map({ condition($0) }).shareReplayLatestWhileConnected()
let observableThen: Observable<E> = observableCondition
.filter({ $0 })
.withLatestFrom(observable)
.flatMapLatest({ then($0) })
.shareReplayLatestWhileConnected()
let observableOtherwise: Observable<E> = observableCondition
.filter({ !$0 })
.withLatestFrom(observable)
.flatMapLatest({ _ in otherwise() })
.shareReplayLatestWhileConnected()
return Observable<Observable<E>>
.from([observableThen, observableOtherwise])
.merge()
}
}
and use it
func refresh() -> Observable<Status> {
let condition = { (status: Status) -> Bool in
return status == .exists
}
let then = { (status: Status) -> Observable<Status> in
return Observable.just(status)
}
return checkLocalStatus()
.flatMapLatest(condition: condition, then: then, otherwise: self.attemptRemoteStatusOverride)
.flatMapLatest(condition: condition, then: then, otherwise: self.attemptRemoteStatusUpdate)
}
I can't call any external functions inside an axios promise. My error is
[Uncaught (in promise) TypeError: this.showNotification is not a function]
showNotification is an external function inside mixin but i can't call it in userCompInfo function
var mixin = {
methods: {
//function to get all user info
userInfo:function(){
//alert(localStorage.getItem("sessionKey"))
if(localStorage.getItem("sessionKey")==null)
session = "null";
else
session= localStorage.getItem("sessionKey");
return axios.post("/api/user/info",{
user_id:localStorage.getItem("userId"),
session_key:session
});
},
//function to get all competition info
compInfo:function()
{ //calling API competition info to get the avaliable competition for now
return axios.post("/api/competition/info",{
lang:source.lang
});
},
userCompInfo:function()
{
axios.all([this.userInfo(),this.compInfo()])
.then(axios.spread(function (user, comp){
if(comp.data.result.errorcode == 0)
{
source.competition = comp.data.competiton_detail;
}
//set the user id in local storage
localStorage.setItem("userId",user.data.user_info.user_id);
//check on session key to save it in local storage
if(user.data.user_info.session_key != "") // for testing
localStorage.setItem("sessionKey",user.data.user_info.session_key);
// get user data successfuly
if(user.data.result.errorcode == 0)
{ //set response data in user
source.user = user.data.user_info;
//to set this user status
this.renderUserInfo();
///////////
//source.competition.is_active=1;
//check on user status to show notification
if(source.user.vip && source.user.suspended)
{
this.showNotification(context.suspended_vip.title+" "+source.user.msisdn, context.suspended_vip.body,["btn_notifi_ok"]);
}
//check if this valid competition is active or not to show notification according to it and to user status
if(source.competition.is_active==1)
{
if(source.user.registered && newUser==1)
{
this.showNotification(context.registered_firstTime.title, context.registered_firstTime.body, ["btn_notifi_start_play"]);
}
else if(source.user.free && source.user.newFreeUser)
{
this.showNotification(context.freeUser_firstTime.title, context.freeUser_firstTime.body, ["btn_notifi_start_play"]);
}
}
}
}));
},
// function to show notification modal
showNotification:function(title, body, buttons)
{
//to hide all modal buttons first
$("#notification").find(".btn").hide();
//set the modal title
$("#notification_title").html(title);
//set the modal body
$("#notification_body").html(body);
//for on buttons array to show all buttons that we want
for(i=0;i<buttons.length;i++)
{
$("#notification").find("#"+buttons[i]).show();
}
//to display modal
$("#notification").modal("show");
},
//function to show the current user statue VIP, registered,free or suspended
renderUserInfo:function()
{ // intialize all flags of user status to false
source.user.vip = false;
source.user.registered = false;
source.user.free = false;
//check on user mode and set the according flag to it to true
if(source.user.sub_mode == "vip")
{
source.user.vip = true;
}
else if(source.user.sub_mode == "sub")
{
source.user.registered = true;
}
else
{
source.user.free = true;
}
},}}
This is a very common mistake. this in userCompInfo doesn't refer to the Vue because of they way you have written the callback.
In your code, make this change.
userCompInfo:function()
{
axios.all([this.userInfo(),this.compInfo()])
.then(axios.spread(function (user, comp){
// a bunch of code...
}.bind(this)));
},
Or
userCompInfo:function()
{
let self = this;
axios.all([this.userInfo(),this.compInfo()])
.then(axios.spread(function (user, comp){
// a bunch of code...
self.showNotification(...)
// some more code...
}));
},
See How to access the correct this inside a callback?