swiftui - Trying to get a chart to appear as a row in a table is chosen - Stack Overflow

admin管理员组

文章数量:1277314

I have a table to display player stats on iPads (I have a makeshift grid view for iPhones). I really like the table, being sortable by different columns, and generally looking more elegant. I can also have the rows being selectable which potentially allows for two interesting features:

1. to delete the user (which I managed with no problems)
2. to show a chart (line graph) with the user stats evolution over time.

I am trying to do this through a context menu on each row with two buttons: a show chart button, and a destructive delete button.

The second button works totally fine. The first one trying to show the chart (or, really, at this point, any view) doesn't do it. I'm trying to show this view (again, ideally, the line chart) through a sheet to be presented when the button is pressed. But nothing is shown when the button is pressed.

Below is the code with play data. For now I just have a Text("Chart goes here") where the chart is supposed to happen. Again, nothing happens when the button in the context menu is pressed. The delete button works fine. I'm assuming it might have to do with a sheet off a button in a context menu in a row in a table?

I welcome other ideas about how to go about this too.

Thanks to all.

import SwiftUI
import Charts

struct stats: Identifiable, Equatable {
    let id: UUID = UUID()
    var name: String
    var games: Int
    var wins: Int
    var carambolas: Int
    var innings: Int
    var longRun: Int
    var avgs: [Double]
}

let ale = stats(name: "Alejandro", games: 10, wins: 8, carambolas: 30, innings: 100, longRun: 10, avgs: [0.4, 0.5, 0.3, 0.28, 0.32, 0.35, 0.27, 0.24, 0.25, 0.3])
let luis = stats(name: "Luis", games: 12, wins: 4, carambolas: 35, innings: 140, longRun: 4, avgs: [0.4, 0.5, 0.3, 0.32, 0.28, 0.32, 0.35, 0.27, 0.24, 0.25, 0.28, 0.25])
let alfredo = stats(name: "Alfredo", games: 15, wins: 7, carambolas: 40, innings: 200, longRun: 3, avgs: [0.4, 0.5, 0.3, 0.28, 0.32, 0.35, 0.27, 0.27, 0.24, 0.25, 0.28, 0.25, 0.24, 0.25, 0.2])
let diego = stats(name: "Diego", games: 18, wins: 7, carambolas: 45, innings: 250, longRun: 5, avgs: [0.4, 0.5, 0.3, 0.28, 0.32, 0.35, 0.27, 0.27, 0.24, 0.25, 0.28, 0.25, 0.24, 0.25, 0.2, 0.22, 0.23, 0.18])

struct ContentView: View {
    @State var data = [ale, luis, alfredo, diego]
    
    @State private var sortOrder = [KeyPathComparator(\stats.carambolas)]
    @State private var selection: stats.ID?
    @State private var showChart: Bool = true
    
    var body: some View {
        Table(of: stats.self, selection: $selection, sortOrder: $sortOrder) {
            TableColumn("Player", value: \.name)
            TableColumn("Games", value: \.games) {data in Text("\(data.games)")}
            TableColumn("Wins", value: \.wins) {data in Text("\(data.wins)")}
            TableColumn("Carambolas", value: \.carambolas) {data in Text("\(data.carambolas)")}
            TableColumn("Innings", value: \.innings) {data in Text("\(data.innings)")}
            TableColumn("Long Run", value: \.longRun) {data in Text("\(data.longRun)")}
            TableColumn("Average", value: \.avgs.last!) {data in Text("\((data.avgs.last!), specifier: "%.3f")")}
        } rows: {
            ForEach(data) { row in
                TableRow(row)
                    .contextMenu {
                        Button("Average Graph") {
                            showChart.toggle()
                        }
                        .sheet(isPresented: $showChart) {
                            Text("Chart goes here")
                        }

                    Divider()
                    
                    Button(role: .destructive) {
                        if let index = data.firstIndex(of: row) {
                            data.remove(at: index)
                            }
                        } label: {
                            Label("Delete Player", systemImage: "trash")
                        }
                }
            }
        }
        .onChange(of: sortOrder) {
            data.sort(using: sortOrder)
        }
    }

I have a table to display player stats on iPads (I have a makeshift grid view for iPhones). I really like the table, being sortable by different columns, and generally looking more elegant. I can also have the rows being selectable which potentially allows for two interesting features:

1. to delete the user (which I managed with no problems)
2. to show a chart (line graph) with the user stats evolution over time.

I am trying to do this through a context menu on each row with two buttons: a show chart button, and a destructive delete button.

The second button works totally fine. The first one trying to show the chart (or, really, at this point, any view) doesn't do it. I'm trying to show this view (again, ideally, the line chart) through a sheet to be presented when the button is pressed. But nothing is shown when the button is pressed.

Below is the code with play data. For now I just have a Text("Chart goes here") where the chart is supposed to happen. Again, nothing happens when the button in the context menu is pressed. The delete button works fine. I'm assuming it might have to do with a sheet off a button in a context menu in a row in a table?

I welcome other ideas about how to go about this too.

Thanks to all.

import SwiftUI
import Charts

struct stats: Identifiable, Equatable {
    let id: UUID = UUID()
    var name: String
    var games: Int
    var wins: Int
    var carambolas: Int
    var innings: Int
    var longRun: Int
    var avgs: [Double]
}

let ale = stats(name: "Alejandro", games: 10, wins: 8, carambolas: 30, innings: 100, longRun: 10, avgs: [0.4, 0.5, 0.3, 0.28, 0.32, 0.35, 0.27, 0.24, 0.25, 0.3])
let luis = stats(name: "Luis", games: 12, wins: 4, carambolas: 35, innings: 140, longRun: 4, avgs: [0.4, 0.5, 0.3, 0.32, 0.28, 0.32, 0.35, 0.27, 0.24, 0.25, 0.28, 0.25])
let alfredo = stats(name: "Alfredo", games: 15, wins: 7, carambolas: 40, innings: 200, longRun: 3, avgs: [0.4, 0.5, 0.3, 0.28, 0.32, 0.35, 0.27, 0.27, 0.24, 0.25, 0.28, 0.25, 0.24, 0.25, 0.2])
let diego = stats(name: "Diego", games: 18, wins: 7, carambolas: 45, innings: 250, longRun: 5, avgs: [0.4, 0.5, 0.3, 0.28, 0.32, 0.35, 0.27, 0.27, 0.24, 0.25, 0.28, 0.25, 0.24, 0.25, 0.2, 0.22, 0.23, 0.18])

struct ContentView: View {
    @State var data = [ale, luis, alfredo, diego]
    
    @State private var sortOrder = [KeyPathComparator(\stats.carambolas)]
    @State private var selection: stats.ID?
    @State private var showChart: Bool = true
    
    var body: some View {
        Table(of: stats.self, selection: $selection, sortOrder: $sortOrder) {
            TableColumn("Player", value: \.name)
            TableColumn("Games", value: \.games) {data in Text("\(data.games)")}
            TableColumn("Wins", value: \.wins) {data in Text("\(data.wins)")}
            TableColumn("Carambolas", value: \.carambolas) {data in Text("\(data.carambolas)")}
            TableColumn("Innings", value: \.innings) {data in Text("\(data.innings)")}
            TableColumn("Long Run", value: \.longRun) {data in Text("\(data.longRun)")}
            TableColumn("Average", value: \.avgs.last!) {data in Text("\((data.avgs.last!), specifier: "%.3f")")}
        } rows: {
            ForEach(data) { row in
                TableRow(row)
                    .contextMenu {
                        Button("Average Graph") {
                            showChart.toggle()
                        }
                        .sheet(isPresented: $showChart) {
                            Text("Chart goes here")
                        }

                    Divider()
                    
                    Button(role: .destructive) {
                        if let index = data.firstIndex(of: row) {
                            data.remove(at: index)
                            }
                        } label: {
                            Label("Delete Player", systemImage: "trash")
                        }
                }
            }
        }
        .onChange(of: sortOrder) {
            data.sort(using: sortOrder)
        }
    }

• swiftui
• swiftui-table

Share Improve this question Follow edited Feb 24 at 10:44 Joakim Danielson 52.1k55 gold badges3333 silver badges7171 bronze badges asked Feb 24 at 5:08 Alejandro AndreottiAlejandro Andreotti 1122 bronze badges 0

Add a comment  | 

1 Answer 1

Sorted by: Reset to default 0

Sheet is a modal view and should not be inside a ForEach loop. So just move the .sheet(isPresented: $showChart){...} outside the Table, for example, just after .onChange(of: sortOrder) {...} and the sheet with the Chart will appear.

Example code:

struct ContentView: View {
    @State var data = [ale, luis, alfredo, diego]
    
    @State private var sortOrder = [KeyPathComparator(\stats.carambolas)]
    @State private var selection: stats.ID?
    @State private var showChart: Bool = false
    
    var body: some View {
        Table(of: stats.self, selection: $selection, sortOrder: $sortOrder) {
            TableColumn("Player", value: \.name)
            TableColumn("Games", value: \.games) {data in Text("\(data.games)")}
            TableColumn("Wins", value: \.wins) {data in Text("\(data.wins)")}
            TableColumn("Carambolas", value: \.carambolas) {data in Text("\(data.carambolas)")}
            TableColumn("Innings", value: \.innings) {data in Text("\(data.innings)")}
            TableColumn("Long Run", value: \.longRun) {data in Text("\(data.longRun)")}
            TableColumn("Average", value: \.avgs.last!) {data in Text("\((data.avgs.last!), specifier: "%.3f")")}
        } rows: {
            ForEach(data) { row in
                TableRow(row)
                    .contextMenu {
                        Button("Average Graph") {
                            selection = row.id  // <--- here
                            showChart.toggle()
                        }
                        Divider()
                        Button(role: .destructive) {
                            if let index = data.firstIndex(of: row) {
                                data.remove(at: index)
                            }
                        } label: {
                            Label("Delete Player", systemImage: "trash")
                        }
                    }
            }
        }
        .onChange(of: sortOrder) {
            data.sort(using: sortOrder)
        }
        .sheet(isPresented: $showChart) {  // <--- here
            if let selected = data.first(where: {$0.id == selection}) {
                ChartView(theStat: selected)
            } else {
                Text("NO DATA").font(.title).bold()
            }
        }
    }
}

struct ChartView: View {
    let theStat: stats
    
    var body: some View {
        VStack {
            Text(theStat.name).font(.title).bold()
            Chart {
                ForEach(Array(theStat.avgs.enumerated()), id: \.offset) { index, value in
                    LineMark(
                        x: .value("Index", index),
                        y: .value("Value", value)
                    )
                }
            }
        }
    }
}

本文标签： swiftuiTrying to get a chart to appear as a row in a table is chosenStack Overflow