SwiftUI使用

查询超过两次的必须记录😂

方法

常规

预览显示暗黑模式 .environment(\.colorScheme, .dark)

/// push 跳转
@State var selection: Int? = nil
NavigationLink(destination: TOMainView(), tag: 1, selection: $selection) {

    Button(action: {
        self.selection = 1
    }) {
        Text("Get Started")
            .frame(minWidth: 220)
            .font(.system(size: 24, weight: .semibold))
            .padding()
            .foregroundColor(Color(uiColor: UIColor(rgb: 0x6644ab)))
            .overlay(
                RoundedRectangle(cornerRadius: 25)
                    .stroke(Color.white, lineWidth: 0)
        )
    }
    .background(Color.white.opacity(0.85)) // If you have this
.cornerRadius(25)
}
/// 直接更换vc
if let window = UIApplication.shared.windows.first {
        window.rootViewController = UIHostingController(rootView: HomeScreen())
        window.makeKeyAndVisible()
    }

ObservedObject,StateObject,EnvironmentObject

@state，wrapped reference，系统自动update ui
@binding，binding type 链接 state object
Struct作为数据源，某一个property更改，会mutate整个struct，因为它是valuetype
ObservableObject不存储数据，class可以继承为此类型，然后定义@published属性，@ObservedObject就让@published产生一个类似@state的属性
StateObject存储数据
EnvironmentObject

• environmentObject(_:)，存
• @EnvironmentObject，取

list等局部刷新

iOS13后出了 tableView collectionView 的 Diffable Data Sources，可以方便的管理刷新了。
但是swiftui里怎么操作的

• 学学这研究素质Understanding how and when SwiftUI decides to redraw views
• SwiftUI 合理使用 EquatableView
• The Mystery Behind View Equality

网络访问及retry按钮

客户端请求的队列话，失败retry，及主动取消？类似tweetbot的发送失败，顶部浮窗点击后一键重试

normalHTTP Request
AdvancedMVVM & Networking with SwiftUI and Combine
AdvancedError Handling with Combine and SwiftUI

loading及Redacted Placeholder

多语言

Localized SwiftUI Views in a Swift Package
SwiftUI: Localization on the Fly

apple login

SwiftUI Sign in With Apple
Sign in with Apple -SwiftUI

参考

SwiftUI: How to get content offset from ScrollView
自定一个badgeSwiftUI Tutorial: Showing Badge on Tab Bar Item
貌似不能改tabbarimage的位置SwiftUI: Adjusting position of Image in a TabView
Building Grid Layouts Using LazyVGrid and LazyHGrid
SwiftUI main list scrollable header view without sections?
prefersLargeTitles 时候，如果有 rightbaritem，怎么对齐？How To Build Resizing Image In Navigation Bar With Large Title