一，代码：
//
// ContentView.swift
// helloworld2
//
// Created by liuhongdi on 2026/3/28.
//import SwiftUIstruct ContentView: View {let imageUrl = "https://imgs-qn.iliangcang.com/ware/slider/1938.png"var body: some View {GeometryReader { geometry inVStack {Text("屏幕宽度: \(geometry.size.width)").padding()Text("屏幕高度: \(geometry.size.height)")AsyncImage(url: URL(string: imageUrl)) { image inimage.resizable().aspectRatio(contentMode: .fit)} placeholder: {ProgressView() // 加载中显示的进度指示器}.frame(width: geometry.size.width, height: 400) // 设置固定尺寸.background(Color.gray)Image(systemName: "heart.fill").resizable() // 使用系统图标名称.foregroundColor(.red) // 设置图标颜色.frame(width: 200, height: 200)}}.background(Color.yellow)}
}#Preview {ContentView()
}
二，测试效果：
![image]()
