为什么颜色视图在swiftUI中是透明的

struct ContentView: View {
    var body: some View {
        ZStack {
            Color.black.opacity(0.5) // 父视图设置了透明度
            Color.red // 子视图颜色
        }
    }
}

struct ContentView: View {
    var body: some View {
        Color.red.background(Color.blue.opacity(0.5)) // 背景颜色设置了透明度
    }
}

struct ContentView: View {
    var body: some View {
        Color.red.opacity(0) // 错误地将opacity设置为0
    }
}

struct ContentView: View {
    var body: some View {
        ZStack {
            Color.black // 确保父视图不透明
            Color.red // 子视图颜色
        }
    }
}

struct ContentView: View {
    var body: some View {
        Color.red.background(Color.blue) // 确保背景颜色不透明
    }
}

struct ContentView: View {
    var body: some View {
        Color.red.opacity(1) // 确保opacity设置为1
    }
}