Screen is blank, but it's supposed to be showing something

App Development
1

Hey y’all,
I’m building a health app where I can’t get the options to show up, it is a blank screen like this instead:

image
image1284×2778 97.1 KB

I also tried it on my phone, but the results were the same. What can I do? my source code is below:

My HealthView.swift file:

import SwiftUI
import HealthKit

struct Health: View {
    private var respository = HKRespository()
    var body: some View {
        NavigationView {
            ScrollView(.vertical, showsIndicators: false) {
                List {
                    ForEach(Activity.allActivities()) { activity in
                        Text(activity.title)
                    }
                }
                .onAppear {
                    respository.requestAuthorization { success in
                                   print("Auth success? \(success)")
                                }

                }
            }
            .navigationBarTitle("Health")
            .background(Color.black.opacity(0.03).ignoresSafeArea())
            .navigationViewStyle(StackNavigationViewStyle())
        }
        
    }
}
struct Health_Previews: PreviewProvider {
    static var previews: some View {
        Health()
    }
}

struct HealthTile: View {
    var title: String
    var icon: String
    var body: some View {
        HStack {
            Image(systemName: icon)
                .font(.largeTitle)
            Spacer()
            Text(title)
                .font(.largeTitle)
        }
        .frame(width: 200, height: 100)
        .cornerRadius(20)
    }
}

My HKRespository.swift file:

import Foundation
import HealthKit

final class HKRespository {
    var store: HKHealthStore?
    
    let allTypes = Set([
        HKObjectType.quantityType(forIdentifier: .activeEnergyBurned)!,
        HKObjectType.quantityType(forIdentifier: .appleExerciseTime)!,
        HKObjectType.quantityType(forIdentifier: .appleStandTime)!,
        HKObjectType.quantityType(forIdentifier: .distanceWalkingRunning)!,
        HKObjectType.quantityType(forIdentifier: .stepCount)!,
    ])
    var query: HKStatisticsCollectionQuery?
    
    init() {
        store = HKHealthStore()
    }
    
    func requestAuthorization(completion: @escaping (Bool) -> Void) {
        guard let store = store else {
            return
        }
        store.requestAuthorization(toShare: [], read: allTypes) { success, error in
            completion(success)
        }
    }
    
    func requestHealthStat(by category: String, completion: @escaping ([HealthStat]) -> Void) {
        guard let store = store, let type = HKObjectType.quantityType(forIdentifier: typeByCategory(category: category)) else {
            return
        }
        let startDate = Calendar.current.date(byAdding: .day, value: -7, to: Date()) ?? Date()
        let endDate = Date()
        let anchorDate = Date.firstDayOfWeek()
        let dailyComponents = DateComponents(day: 1)

        var healthStats = [HealthStat]()
        
        let predicate = HKQuery.predicateForSamples(withStart: startDate, end: endDate, options: .strictStartDate)
        
        query = HKStatisticsCollectionQuery(quantityType: type, quantitySamplePredicate: predicate, options: .cumulativeSum, anchorDate: anchorDate, intervalComponents: dailyComponents)
        
        query?.initialResultsHandler = { query, statistics, error in
            statistics?.enumerateStatistics(from: startDate, to: endDate, with: { stats, _ in
                let stat = HealthStat(stat: stats.sumQuantity(), date: stats.startDate)
                healthStats.append(stat)
            })
            completion(healthStats)
        }
        guard let query = query else {
            return
        }
        store.execute(query)
    }
    
    private func typeByCategory(category: String) -> HKQuantityTypeIdentifier {
        switch category {
        case "activeEnergyBurned":
            return .activeEnergyBurned
            
        case "appleExerciseTime":
            return .appleExerciseTime
            
        case "appleStandTime":
            return .appleStandTime
            
        case "distanceWalkingRunning":
            return .distanceWalkingRunning
            
        case "stepCount":
            return .stepCount
        default:
            return .stepCount
        }
        
        
    }
}

extension Date {
    static func firstDayOfWeek() -> Date {
        return Calendar(identifier: .iso8601).date(from: Calendar(identifier: .iso8601).dateComponents([.yearForWeekOfYear, .weekOfYear], from: Date())) ?? Date()
    }
}

And my Activities.swift file:

import Foundation
import HealthKit

struct Activity: Identifiable {
    var id: String
    var title: String
    var image: String
    
    static func allActivities()-> [Activity] {
        return [
            Activity(id: "activeEnergyBurned", title: "Calories Burned", image: "bolt.circle.fill"),
            Activity(id: "appleExerciseTime", title: "Exercise Time", image: "lungs.fill"),
            Activity(id: "appleStandTime", title: "Stand Time", image: "figure.stand"),
            Activity(id: "distanceWalkingRunning", title: "Distance Walking/Running", image: "figure.wave.circle.fill"),
            Activity(id: "stepCount", title: "Steps", image: "figure.walk.diamond.fill"),
        ]
    }
}

struct HealthStat: Identifiable {
    let id = UUID()
    let stat: HKQuantity?
    let date: Date
}

Any help on this would be appreciated, thanks!

2

it seems like its not getting any data supplied to it?

it also seems that you are only populating by using Activity but your are not putting any text(or anything) from those activities