LazyVGrid 中的 SwiftUI 中心项目

Question

我是 SwiftUI 的新手，正在尝试将LazyVGrid视图中的元素居中。

这是我目前拥有的：

使用：

var body: some View {
    ZStack {
        Color(red: 75/255, green: 0, blue: 130/255).ignoresSafeArea()
        VStack {
            LazyVGrid(columns: [GridItem(.adaptive(minimum: 30))], alignment: .center, spacing: 10) {
                let letters = wordToArray(word: testWord)
                ForEach(Array(letters.enumerated()), id: \.offset) { letter in
                    Text(String(letter.element).capitalized)
                        .foregroundColor(.blue)
                        .frame(width:30, height: 40)
                        .background(Color.yellow)
                        .cornerRadius(5)
                }
            }
            .padding()
        }
    }
}

但是正如您所看到的，这只会将元素向左对齐 - 我也不知道我可能需要显示的字符数。 我还希望它们之间的间距与上面相同。

任何帮助将不胜感激！

谢谢。

Answer 1

2个选项

struct CenteredLVSView: View {
    @State var letters: [String] = ["A", "B", "C", "D", "E","A", "B", "C", "D", "E","A", "B", "C", "D", "E"]
    //Specify column count and it will justify/center by width
    @State var columnCount: Int = 5
    var body: some View {
        ZStack {
            Color(red: 75/255, green: 0, blue: 130/255).ignoresSafeArea()
            LazyVGrid(columns: Array(repeating: GridItem(.flexible(minimum: 30
                 //If you set max it will center on width if smaller than max, uncomment below
                 //, maximum: 40
            )), count: columnCount), spacing: 10){
                ForEach(Array(letters.enumerated()), id: \.offset) { letter in
                    Text(String(letter.element).capitalized)
                        .foregroundColor(.blue)
                        .frame(width:30, height: 40)
                        .background(Color.yellow)
                        .cornerRadius(5)
                }
            }
            .padding()
        }
    }
}

更改为LazyHGrid

struct CenteredLVSView: View {
    @State var letters: [String] = ["A", "B", "C", "D", "E","A", "B", "C", "D", "E","A", "B", "C", "D", "E"]
    //Specify row count and it will justify/center height
    @State var rowCount: Int = 5
    var body: some View {
        ZStack {
            Color(red: 75/255, green: 0, blue: 130/255).ignoresSafeArea()
            LazyHGrid(rows: Array(repeating: GridItem(.flexible(minimum: 30
                //If you set max it will center if smaller than max, height uncomment below
                //, maximum: 40
            )), count: rowCount), spacing: 10){
                ForEach(Array(letters.enumerated()), id: \.offset) { letter in
                    Text(String(letter.element).capitalized)
                        .foregroundColor(.blue)
                        .frame(width:30, height: 40)
                        .background(Color.yellow)
                        .cornerRadius(5)
                }
            }
            .padding()
        }
    }
}

正如评论中所述，如果您设置了maximum它们将居中/对齐到该最大值

LazyHGrid w/ 3 行，最多 40

LazyVGrid 有 5 列，最多 40

Answer 2

我遇到了同样的问题但无法解决，所以我使用了 ScrollView 和 foreach 来实现我需要的相同方式

struct Subview: View {
var Items = ["a","b","c","d","e"]
var body: some View {
    ZStack(){
        Color("AccentColor").edgesIgnoringSafeArea(.all)
        VStack{
            HStack(alignment:.center){
            GeometryReader { geo in
                ScrollView(.horizontal,showsIndicators: false){
                HStack(alignment:.center){
                ForEach(Items, id: \.self) { item in
                Button {
                    } label: {
                Text("\(item)")
                }.frame(width:50,height: 50, alignment: .center).background(Color.red).cornerRadius(25)
                                
                }
                            
                            
                }.frame(width:geo.size.width,height: geo.size.height ,alignment: .center)
                        }
                    }
            }.frame(width: UIScreen.main.bounds.width - 40, height: 100, alignment: .center)
        }
        
    }.frame(width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height, alignment: .center)
            
}    }