struct AvatarImage: View {
    var body: some View {

            Image("myImage")
                .resizable()
                .scaledToFill() // <=== Saves aspect ratio
                .frame(width: 60.0, height:60)
                .clipShape(Circle())

    }
}

建议使用以下代码来匹配多个屏幕尺寸:

Image("dog")
    .resizable()
    .frame(minWidth: 200, idealWidth: 400, maxWidth: 600, minHeight: 100, idealHeight: 200, maxHeight: 300, alignment: .center)

“图像属性”的定义如下:—

   Image("\(Image Name)")
   .resizable() // Let you resize the images
   .frame(width: 20, height: 20) // define frame size as required
   .background(RoundedRectangle(cornerRadius: 12) // Set round corners
   .foregroundColor(Color("darkGreen"))      // define foreground colour 

另一种方法是使用scaleEffect修饰符:

Image(room.thumbnailImage)
    .resizable()
    .scaleEffect(0.5)

在图像视图上使用带有动态类型的字体修饰符:

Image(systemName: "nose")
        .font(.largeTitle)

好吧，在SwiftUI中似乎很简单/按照他们给出的演示:https://developer.apple.com/videos/play/wwdc2019/204

struct RoomDetail: View {
     let room: Room
     var body: some View {

     Image(room.imageName)
       .resizable()
       .aspectRatio(contentMode: .fit)
 }

希望能有所帮助。