在SwiftUI中创建一个VStack填充屏幕宽度

给定以下代码:

import SwiftUI

struct ContentView: View {
  var body: some View {
    VStack(alignment: .leading) {
      Text("Title")
        .font(.title)

      Text("Content")
        .lineLimit(nil)
        .font(.body)

      Spacer()
    }
    .background(Color.red)
  }
}

#if DEBUG
struct ContentView_Previews : PreviewProvider {
  static var previews: some View {
    ContentView()
  }
}
#endif

它的结果是这个接口:

我怎样才能使VStack填充屏幕的宽度，即使标签/文本组件不需要全宽度?

我发现的一个技巧是在结构中插入一个空的HStack，如下所示:

VStack(alignment: .leading) {
  HStack {
    Spacer()
  }
  Text("Title")
    .font(.title)

  Text("Content")
    .lineLimit(nil)
    .font(.body)

  Spacer()
}

产生所需的设计:

有没有更好的办法?

当前回答

方法1 ->使用MaxWidth和MaxHeight

import SwiftUI

struct SomeView: View {
    var body: some View {
        VStack {
            Text("Hello, World!")
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .background(.red)
    }
}

struct SomeView_Previews: PreviewProvider {
    static var previews: some View {
        SomeView()
    }
}

方法2 ->使用主屏幕边界

import SwiftUI

struct SomeView: View {
    var body: some View {
        VStack {
            Text("Hello, World!")
        }
        .frame(maxWidth: UIScreen.main.bounds.width, maxHeight: UIScreen.main.bounds.height)
        .background(.red)
    }
}

struct SomeView_Previews: PreviewProvider {
    static var previews: some View {
        SomeView()
    }
}

方法3 ->使用几何阅读器

import SwiftUI

struct SomeView: View {
    var body: some View {
        GeometryReader { geometryReader in
            VStack {
                Text("Hello, World!")
            }
            .frame(maxWidth: geometryReader.size.width, maxHeight: geometryReader.size.height)
            .background(.red)
        }
    }
}

struct SomeView_Previews: PreviewProvider {
    static var previews: some View {
        SomeView()
    }
}

方法4 ->使用间隔

import SwiftUI

struct SomeView: View {
    var body: some View {
        VStack {
            Text("Hello, World!")
            HStack{
                Spacer()
            }
            Spacer()
        }
        .background(.red)
    }
}

struct SomeView_Previews: PreviewProvider {
    static var previews: some View {
        SomeView()
    }
}

2022-01-28 06:17:28

其他回答

这里有另一种方法可以节省你的项目时间:

与其他不可重用的答案相比，代码和可重用性要少得多!

extension View {
    
    var maxedOut: some View {
        
        return Color.clear
            .overlay(self, alignment: .center)

    }
    
    func maxedOut(color: Color = Color.clear, alignment: Alignment = Alignment.center) -> some View {
        
        return color
            .overlay(self, alignment: alignment)
        
    }
    
}

用例:

struct ContentView: View {

    var body: some View {

        Text("Hello, World!")
            .maxedOut
            .background(Color.blue)
        
        Text("Hello, World!")
            .maxedOut(color: Color.red)
  
    }
}

2021-04-18 09:37:36

只需添加颜色。清除到VStack的底部，就这么简单:)

struct ContentView: View {
   var body: some View {
     VStack(alignment: .leading) {
       Text("Title")

       Color.clear
     }
     .background(Color.red)
   }
 }

2022-10-21 21:30:34

另一种可行且可能更直观的堆放方式如下:

struct ContentView: View {
    var body: some View {
        HStack() {
            VStack(alignment: .leading) {
                Text("Hello World")
                    .font(.title)
                Text("Another")
                    .font(.body)
                Spacer()
            }
            Spacer()
        }.background(Color.red)
    }
}

如果需要，还可以通过删除Spacer()来轻松地重新定位内容。

2019-06-07 14:43:19

使用这个

.edgesIgnoringSafeArea(.all)

2019-11-07 21:28:59

使用SwiftUI设计登录页面

import SwiftUI

struct ContentView: View {

    @State var email: String = "william@gmail.com"
    @State var password: String = ""
    @State static var labelTitle: String = ""


    var body: some View {
        VStack(alignment: .center){
            //Label
            Text("Login").font(.largeTitle).foregroundColor(.yellow).bold()
            //TextField
            TextField("Email", text: $email)
                .textContentType(.emailAddress)
                .foregroundColor(.blue)
                .frame(minHeight: 40)
                .background(RoundedRectangle(cornerRadius: 10).foregroundColor(Color.green))

            TextField("Password", text: $password) //Placeholder
                .textContentType(.newPassword)
                .frame(minHeight: 40)
                .foregroundColor(.blue) // Text color
                .background(RoundedRectangle(cornerRadius: 10).foregroundColor(Color.green))

            //Button
            Button(action: {

            }) {
                HStack {
                    Image(uiImage: UIImage(named: "Login")!)
                        .renderingMode(.original)
                        .font(.title)
                        .foregroundColor(.blue)
                    Text("Login")
                        .font(.title)
                        .foregroundColor(.white)
                }


                .font(.headline)
                .frame(minWidth: 0, maxWidth: .infinity)
                .background(LinearGradient(gradient: Gradient(colors: [Color("DarkGreen"), Color("LightGreen")]), startPoint: .leading, endPoint: .trailing))
                .cornerRadius(40)
                .padding(.horizontal, 20)

                .frame(width: 200, height: 50, alignment: .center)
            }
            Spacer()

        }.padding(10)

            .frame(minWidth: 0, idealWidth: .infinity, maxWidth: .infinity, minHeight: 0, idealHeight: .infinity, maxHeight: .infinity, alignment: .top)
            .background(Color.gray)

    }

}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

2020-02-19 13:47:22

在SwiftUI中创建一个VStack填充屏幕宽度

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