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मी एक साधा होम व्ह्यू लिहिला आहे जो माझ्या सर्व प्लेलिस्ट प्रदर्शित करण्यासाठी LazyVGrid वापरतो. SwiftData च्या @Query वापरून प्लेलिस्टची चौकशी केली आहे, पण UI का गोठते हे मला माहीत नाही. डेटाबेसमध्ये फक्त एकच प्लेलिस्ट आहे, त्यामुळे जास्त डेटामुळे हे होऊ शकत नाही.

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मी क्वेरी योग्यरित्या वापरत आहे का?

माझ्या घराचे दृश्य खालीलप्रमाणे आहे:

import SwiftUI
import SwiftData

enum stateMode  {
    case deleteMode
    case updateMode
    case normalMode
}

struct Home: View {
    @State private var mode: stateMode = .normalMode
    var columns: [GridItem] {
        return [
            GridItem(.flexible(), spacing: 10, alignment: .center),
            GridItem(.flexible(), spacing: 10, alignment: .center),
            GridItem(.flexible(), spacing: 10, alignment: .center)
        ]
    }
    @Query var playList : [PlayListModel] = []
    var body: some View {
        NavigationStack {
            
            
            ScrollView {
                LazyVGrid(columns: columns, spacing: 20) {
                    ForEach(playList) { playlist in
                        Button {
                            
                        } label: {
                            PlaylistItemView(/*playlist: playlist,*/ mode: mode)
                        }
                    }
                }
            }
            .toolbar {
                ToolbarItemGroup {
                    Menu {
                        Button(action: {
                            withAnimation {
                                mode = .deleteMode
                            }
                        }) {
                            Label("Delete Mode", systemImage: "trash.circle.fill")
                        }
                        Button(action: {
                            withAnimation {
                                mode = .updateMode
                            }
                        }) {
                            Label("Update Mode", systemImage: "arrow.clockwise.circle.fill")
                        }
                    } label: {
                        Image(systemName: "ellipsis.circle")
                    }
                }
            }
        }
    }
}

struct PlaylistItemView: View {
    let mode: stateMode

    var body: some View {
        VStack {
            if mode == .normalMode {
                Image(systemName: "tv")
                    .resizable()
                    .aspectRatio(contentMode: .fit)
                    .frame(width: 50, height: 50)
                    .padding()
            } else if mode == .deleteMode {
                Image(systemName: "trash.circle.fill")
                    .resizable()
                    .aspectRatio(contentMode: .fit)
                    .frame(width: 50, height: 50)
                    .padding()
            } else {
                Image(systemName: "arrow.clockwise.circle.fill")
                    .resizable()
                    .aspectRatio(contentMode: .fit)
                    .frame(width: 50, height: 50)
                    .padding()
            }

            Text("TEST")
                .foregroundColor(.white)
        }
        .background(Color.black.opacity(0.2))
        .cornerRadius(10)
    }
}

// the data mode:

import Foundation
import SwiftData

@Model
final class PlayListModel {
    var id = UUID()
    var timestamp: Date
    var playlistName: String
    var playlistUrl: String
    var lastUpdate: Date
    
    @Relationship(deleteRule: .cascade, inverse: \PlaylistGroup.playlistModel)
    var groups: [PlaylistGroup]
    
    init(timestamp: Date, playlistName: String, playlistUrl: String, lastUpdate: Date) {
        self.timestamp = timestamp
        self.playlistName = playlistName
        self.playlistUrl = playlistUrl
        self.lastUpdate = lastUpdate
        self.groups = []
    }
}

@Model
class PlaylistGroup: Hashable, Identifiable {
    var id = UUID()
    var groupName: String
    var playlistModel: PlayListModel
    
    @Relationship(deleteRule: .cascade, inverse: \PlaylistItem.group)
    var playlistItems: [PlaylistItem]
    
    init(id: UUID = UUID(), groupName: String, playlistModel: PlayListModel) {
        self.id = id
        self.groupName = groupName
        self.playlistModel = playlistModel
        self.playlistItems = []
    }
    
    // Required for Hashable conformance
    static func == (lhs: PlaylistGroup, rhs: PlaylistGroup) -> Bool {
        lhs.id == rhs.id
    }
    
    func hash(into hasher: inout Hasher) {
        hasher.combine(id)
    }
}

@Model
class PlaylistItem: Hashable, Identifiable {
    var id = UUID()
    var duration: Int?
    var tvgId: String?
    var tvgName: String?
    var tvgCountry: String?
    var tvgLanguage: String?
    var tvgLogo: String?
    var tvgChno: String?
    var tvgShift: String?
    var groupTitle: String
    var seasonNumber: Int?
    var episodeNumber: Int?
    var kind: String?
    var url: URL?
    var lastPlay: Date
    
    var group: PlaylistGroup?
    
    init(id: UUID = UUID(), duration: Int? = nil, tvgId: String? = nil, tvgName: String? = nil, tvgCountry: String? = nil, tvgLanguage: String? = nil, tvgLogo: String? = nil, tvgChno: String? = nil, tvgShift: String? = nil, groupTitle: String, seasonNumber: Int? = nil, episodeNumber: Int? = nil, kind: String? = nil, url: URL? = nil, lastPlay: Date) {
        self.id = id
        self.duration = duration
        self.tvgId = tvgId
        self.tvgName = tvgName
        self.tvgCountry = tvgCountry
        self.tvgLanguage = tvgLanguage
        self.tvgLogo = tvgLogo
        self.tvgChno = tvgChno
        self.tvgShift = tvgShift
        self.groupTitle = groupTitle
        self.seasonNumber = seasonNumber
        self.episodeNumber = episodeNumber
        self.kind = kind
        self.url = url
        self.lastPlay = lastPlay
    }
    
    // Required for Hashable conformance
    static func == (lhs: PlaylistItem, rhs: PlaylistItem) -> Bool {
        lhs.id == rhs.id
    }
    
    func hash(into hasher: inout Hasher) {
        hasher.combine(id)
    }
}

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