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January 4, 2020 03:32
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| // Authoer: The SwiftUI Lab | |
| // Full article: https://swiftui-lab.com/scrollview-pull-to-refresh/ | |
| import SwiftUI | |
| struct ContentView: View { | |
| @ObservedObject var model = MyModel() | |
| @State private var alternate: Bool = true | |
| let array = Array<String>(repeating: "Hello", count: 100) | |
| let transaction = Transaction(animation: .easeInOut(duration: 2.0)) | |
| var body: some View { | |
| return VStack(spacing: 0) { | |
| HeaderView(title: "Dog Roulette") | |
| RefreshableScrollView(height: 70, refreshing: self.$model.loading) { | |
| DogView(dog: self.model.dog).padding(30).background(Color(UIColor.systemBackground)) | |
| }.background(Color(UIColor.secondarySystemBackground)) | |
| } | |
| } | |
| struct HeaderView: View { | |
| var title = "" | |
| var body: some View { | |
| VStack { | |
| Color(UIColor.systemBackground).frame(height: 30).overlay(Text(self.title)) | |
| Color(white: 0.5).frame(height: 3) | |
| } | |
| } | |
| } | |
| struct DogView: View { | |
| let dog: Dog | |
| var body: some View { | |
| VStack { | |
| Image(dog.picture, defaultSystemImage: "questionmark.circle.fill") | |
| .resizable() | |
| .aspectRatio(contentMode: .fit) | |
| .frame(height: 160) | |
| .clipShape(Circle()) | |
| .overlay(Circle().stroke(Color.white, lineWidth: 2)) | |
| .padding(2) | |
| .overlay(Circle().strokeBorder(Color.black.opacity(0.1))) | |
| .shadow(radius: 3) | |
| .padding(4) | |
| Text(dog.name).font(.largeTitle).fontWeight(.bold) | |
| Text(dog.origin).font(.headline).foregroundColor(.blue) | |
| Text(dog.description) | |
| .lineLimit(nil) | |
| .frame(height: 1000, alignment: .top) | |
| .padding(.top, 20) | |
| } | |
| } | |
| } | |
| } | |
| extension Image { | |
| init(_ name: String, defaultImage: String) { | |
| if let img = UIImage(named: name) { | |
| self.init(uiImage: img) | |
| } else { | |
| self.init(defaultImage) | |
| } | |
| } | |
| init(_ name: String, defaultSystemImage: String) { | |
| if let img = UIImage(named: name) { | |
| self.init(uiImage: img) | |
| } else { | |
| self.init(systemName: defaultSystemImage) | |
| } | |
| } | |
| } |
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