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in Technique[技术] by (31.9m points)

ios - How do I setup ZStack with Image filled to the widget bounds?

My code looks like this:

    ZStack {
        
        NetworkImage(url: url)
        VStack(alignment: .trailing, spacing: 5) {
            Spacer()
            Text("this is my quite long title here")
                    .font(.title)
                    .bold()
                    .foregroundColor(.white)
                    .lineLimit(nil)
                    .multilineTextAlignment(.trailing)
            Text("subtitle this is my long long subtitle to create multiply lines")
                    .font(.caption)
                    .foregroundColor(.white)
                    .lineLimit(nil)
                    .multilineTextAlignment(.trailing)
        }
        .padding()
    }

struct NetworkImage: View {
    let url: URL?
    var body: some View {
        if let url = url, let imageData = try? Data(contentsOf: url), let uiImage = UIImage(data: imageData) {
            Image(uiImage: uiImage)
                .resizable()
                .scaledToFill()
        }
    }
}

But this looks bad and it is not what I need t achieve.

I need to make it aligned to the right and to the bottom with some padding from the edges. That is all. How can I do this?

enter image description here enter image description here

After update from @user1046037 answer it looks like:

enter image description here enter image description here


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1 Answer

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by (31.9m points)

Code Changes:

1. ZStack Alignment

ZStack(alignment: Alignment(horizontal: .trailing, vertical: .bottom)) {

2. Crop in the center

In NetworkImage, center crop (code provided) in the image extension.

Thanks to @vacawama How to center crop an image in SwiftUI

Complete Code:

struct ContentView: View {
    var body: some View {
        ZStack(alignment: Alignment(horizontal: .trailing, vertical: .bottom)) {
            
            NetworkImage(url: URL(string: "https://unsplash.com/photos/KZv3Rb_OIXI/download?force=true"))
            VStack(alignment: .trailing, spacing: 5) {
                Spacer()
                Text("this is my quite long title here")
                        .font(.title)
                        .bold()
                        .foregroundColor(.white)
                        .lineLimit(nil)
                        .multilineTextAlignment(.trailing)
                Text("subtitle this is my long long subtitle to create multiply lines")
                        .font(.caption)
                        .foregroundColor(.white)
                        .lineLimit(nil)
                        .multilineTextAlignment(.trailing)
            }
            .padding()
        }
    }
}

//Center Crop
extension Image {
    func centerCropped() -> some View {
        GeometryReader { geo in
            self
            .resizable()
            .scaledToFill()
            .frame(width: geo.size.width, height: geo.size.height)
            .clipped()
        }
    }
}

struct NetworkImage: View {
    let url: URL?
    var body: some View {
        if let url = url, let imageData = try? Data(contentsOf: url), let uiImage = UIImage(data: imageData) {
            Image(uiImage: uiImage)
                .centerCropped()
        }
    }
}

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

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