基本觀點
Text用於顯示一行或多行文本內容，效果與相同UILabel，但效果更好。
如果要創建Text，只需使用創建它Text("SwiftUI")；使用鏈接的語法，您還可以向文本添加多個屬性，例如字體，顏色，陰影，左上和右上的間距等等。
例：
Text("SwiftUI")
.foregroundColor(.orange)
.bold()
.font(.system(.largeTitle))
.fontWeight(.medium)
.italic()
.shadow(color: .black, radius: 1, x: 0, y: 2)
查看運行結果
HStack and VStack controls are used to host multiple views, as mentioned later.
文本域
TextField 用於添加普通輸入框，通常將其用作文本輸入。
Example：
TextField(self.$name, placeholder: self.nameText, onEditingChanged: { changed in
print("onEditing: \(changed)")
}) {
print("userName: \(self.name)")
self.endEditing(true)
}}
.padding(10)
.frame(height: 50)
.textFieldStyle(RoundedBorderTextFieldStyle())
.padding(EdgeInsets(top: 0, leading: 20, bottom: 0, trailing: 20))
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SecureField
SecureField is generally used as a password input. It is used in the same way as TextField. The example and the running effect are the same as TextField.
Image
The Image control is used to display images, example:
Image("icon") .resizable() .frame(width: 100, height: 100, alignment: .center)
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WebImage
webImage is used to download the web image, use the URLSession to download the original Image after successful download; you can also use Kingfisher in the downloadWebImage function .
Example：
var body: some View { Image(uiImage: self.uiImage ?? placeholderImage) .resizable() .onAppear(perform: downloadWebImage) .frame(width: 80, height: 80, alignment: .center) .onTapGesture { print("Tap ") } }
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Button
Button is used to respond to click events.
Example:
Button(action: { print("Tap") }) { Text("I'm a Button") }
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PullDownButton
Waiting for release.
ItemBasedPopUpButton
Waiting for release.
NavigationButton
NavigationButtonPage is used to push to the next navigation page.
Example:
NavigationLink(destination: NavigationButtonPage()) { Text("NavigationButton").bold() .foregroundColor(.orange) .font(.largeTitle) } .navigationBarTitle(Text("Page"))
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PresentationButton is deprecated
PresentationButton is used to pop up a page. has deprecated, please use NavigationLink
EditButton
EditButton is used to trigger the editing state, just use the navigationBarItems setting when using it.
Example:
navigationBarItems(trailing: EditButton())
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PasteButton
Waiting for release.
Picker
Picker can customize the selector of the data source.
Example:
Picker(selection: $leftIndex, label: Text("Picker")) { ForEach(0..<leftSource.count) { Text(self.leftSource[$0]).tag($0) } }.frame(width: UIScreen.main.bounds.width/2)
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DatePicker
DatePicker is used to select the absolute date of the control.
Example:
DatePicker(selection: $server.date, in: server.spaceDate, displayedComponents: .date, label: { Text("") })
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Toggle
Toggle is used to switch the selected state, for example:
Togglele(isOn: $isOn) { Text("State: \(self.isOn == true ? "Open":"open")") }.padding(20)
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Slider
Slider A control for selecting values from a finite range of values, example:
Slider(value: $data.rating)
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Stepper
Stepper is used to increase or decrease the value, example:
Stepper(value: $value, step: 2, onEditingChanged: { c in print(c) }) { Text("Stepper Value: \(self.value)") }.padding(50)
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SegmentedControl is deprecated
SegmentedControl is used for segmentation condition selection, example:
SegmentedControl(selection: $currentIndex) { ForEach(0..<items.count) { index in Text(self.items[index]).tag(index) } }.tapAction { print("currentIndex: \(self.currentIndex)") }
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WebView
WebView is used to display an open web page, example:
struct WebViewPage : UIViewRepresentable { func makeUIView(context: Context) -> WKWebView { return WKWebView() } func updateUIView(_ uiView: WKWebView, context: Context) { let req = URLRequest(url: URL(string: "https://www.apple.com")!) uiView.load(req) } }
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UIViewController
UIViewController is used to display the UIViewController that opens UIKit in SwiftUI and opens the SwiftUI View in UIViewController.
Example:
First define:
struct ControllerPage<T: UIViewController> : UIViewControllerRepresentable { typealias UIViewControllerType = UIViewController func makeUIViewController(context: UIViewControllerRepresentableContext<ControllerPage>) -> UIViewController { return T() } func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<ControllerPage>) { debugPrint("\(#function)：\(type(of: T.self))") } }
Then use this:
NavigationButton(destination: ControllerPage<UIKitController>()) { PageRow(title: "UIViewController",subTitle: "Open UIViewController") }
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Layout
HStack
HStack is used to arrange the subviews on a horizontal line.
Example:
HStack {
Text("made in China.") Divider() // Just add a line. Text("the People's Republic Of China.") }
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VStack
VStack is used to arrange the subviews on a vertical line.
Example:
VStack {
Text("made in China.") Divider() // Just add a line. Text("the People's Republic Of China.") }
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ZStack
ZStack is used to override the subview, aligned on two axes.
Example:
ZStack {
Text("made in China.") Divider() // Just add a line. Text("the People's Republic Of China.") }
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List
List list container to display a list of data.
Examples:
List(0..<5) { item in Text("Hello World !") }.navigationBarTitle(Text("List"), displayMode: .large)
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ScrollView
ScrollView is a scroll view container.
Example:
ScrollView {
Text("SwiftUI").padding(20) Divider() Image("icon").resizable() .frame(width: 300, height: 300, alignment: .center) Divider() Text("Views and ... user interface.") } .border(Color.gray.gradient, width: 1) .cornerRadius(10) .padding(10) .navigationBarTitle(Text("ScrollView"))
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ForEach
ForEach is used to present a view based on a collection of existing data.
Example:
let data = (0..<5) var body: some View { ForEach(data) { e in Text("Hello \(e)") .bold() .font(.system(size: 25, design: .monospaced)) .padding(5) }
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Group
Group is used to aggregate multiple views, and the properties set on the Group will be applied to each child view.
Example:
Group {
Text("Hello World !") Text("Hello World !") }
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GroupBox
Waiting for release.
Section
Section is used to create the header/footer view content, which is generally used in conjunction with the List component.
Example:
Section(header: Text("I'm header"), footer: Text("I'm footer")) { ForEach(0..<3) { Text("Hello \($0)") } }
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Form
Form A container for grouping controls used for data entry, such as in settings or inspectors.
Example:
Form {
TextField("First Name", text: $firstName) TextField("Last Name", text: $lastName) }
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NavigationView
NavigationView is used to create a view container that contains the top navigation bar.
Example:
NavigationView {
Text("🧚♂️🧚♀️🧜♂️🧜♀️🧞♂️🧞♀️").blur(radius: 5) Text("Swifter Swifter") .bold() .foregroundColor(.orange) .font(.largeTitle) } .navigationBarTitle(Text("NavigationView"))
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TabView
TabView is used to create a view container that contains the bottom ** TabBar**.
Example:
TabView(selection: $index) { ForEach(0..<imgs.count) { item in TabItemPage(index: item) .tabItem{ Image(self.imgs[item]) Text("\(item)") } .tag(item) } }
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HSplitView
Waiting for release.
VSplitView
Waiting for release.
Alert
Alert is used to display a bullet reminder that needs to be associated with a trigger event.
Example:
alert(isPresented: $showAlert, content: { Alert(title: Text("確定要支付這100000000美元嗎？"), message: Text("請謹慎操作\n一旦確認，錢款將立即轉入對方賬戶"), primaryButton: .destructive(Text("確認")) { print("轉出中...") }, secondaryButton: .cancel()) }).navigationBarTitle(Text("Alert"))
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ActionSheet
ActionSheet is used to pop up a selection box.
Example:
ActionSheet(title: Text("Title"), message: Text("Message"), buttons: [.default(Text("Default"), onTrigger: { print("Default") self.showSheet = false }),.destructive(Text("destructive"), onTrigger: { print("destructive") self.showSheet = false }),.cancel({ print("Cancel") self.showSheet = false })])
usage：
.actionSheet(isPresented: $showSheet, content: {sheet})
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Modal
Modal is used to pop up a view.
Example:
Modal(Text("Modal View"),onDismiss: { print("View Dismiss !") })
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Popover
Popover is used to pop up a view, see the results below.
Example:
.popover(isPresented: $showPop, content: { ImagePage() })
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