状态管理:我们使用@State声明几个状态变量,如items(存储列表项),showingActionSheet(控制是否显示ActionSheet),以及selectedItem(存储当前选择的项)。 列表展示:使用List显示所有的项,并为每一项添加点击手势,当用户点击的时候,会更新selectedItem并显示ActionSheet。 ActionSheet 的配置:在actionSheet修饰符中,我们定义了两个...
11.Accessibility Value 12.Action 13.Adjustable Action 14.Element 15.Scroll Action 十.Events Events修饰符当控件发生改变时候响应事件 1.On Appear 2.On Change 3.On Continue User Activity 4.On Delete On Delete 手势右滑删除 主要用于List列表 也可以在导航栏添加 Edit/Done 按钮来删除 structsonStruct :...
sureBtn.addTarget(self, action: #selector(sureClick), for: UIControl.Event.touchUpInside) sureBtn.setTitleColor(UIColor.black, for: UIControl.State.normal) v.addSubview(sureBtn) return v }() //确定按钮 @objc func sureClick(sender:UIButton){ print("确定") selectAllcell(isselectOrcancel...
复制 List { ForEach(items) { item in Text(item.title) .onTapGesture { withAnimation { // 切换列表行的展开和折叠状态 self.items.toggle() } } if item.isExpanded { Text(item.detail) .padding() .animation(.easeInOut) } } } 在上述代码中,我们首先将列表行的标题显示为文本,并在其上添加...
import SwiftUI struct ContentView: View { @State private var selectedOption = "Option 1" let options = ["Option 1", "Option 2", "Option 3"] var body: some View { VStack { Picker("Select an option", selection: $selectedOption) { ForEach(options, id: \.self) { option in Text(opt...
addTarget(self, action: #selector(textFieldDidChange(_:)), for: .editingChanged) button.isEnabled = false } @objc private func textFieldDidChange(_ textField: UITextField) { button.isEnabled = textField.text?.isEmpty == false } } 这段代码应该是很直观的,因为我们已经在命令式编程中写过...
() for model in parent.modelSettings.modelList { let menuItem = NSMenuItem(title: model.name, action: #selector(selectModel(_:)), keyEquivalent: "") menuItem.target = self menuItem.representedObject = model menu.addItem(menuItem) } print("Instance address: \(Unmanaged.passUnretained(self)...
Button(action: {print("Tap") }) {Text("I'm a Button") } View running results 🔝 PullDownButton Waiting for release. ItemBasedPopUpButton Waiting for release. NavigationButton NavigationButtonPageis used to push to the next navigation page. ...
Continue where you left off from Part 1, or traverse time and space and begin with the Part 2 starter project to jump right into the action. Find out how you can integrate system intelligence... 10:26 What's new in PencilKit WWDC20 iOS, iPadOS PencilKit helps power creativity, ...
小册子之 List、Lazy 容器、ScrollView、Grid 和 Table 数据集合 SwiftUI 视图 小册子之详说 Navigation、ViewThatFits、Layout 协议等布局 SwiftUI 组件 【本篇】小册子之 Form、Picker、Toggle、Slider 和 Stepper 表单相关 SwiftUI 视图 小册子之 SwiftUI 动画 ...