如何在 SwiftUI 预览中使用 SwiftData
基于模型扩展在模型的基础上进行扩展,这里以 movie 模型为例import Foundation import SwiftData @Model final class Movie { var title: String var year: Int @Relationship(deleteRule: .ca...
如何动态更改查询的排序顺序或谓词
要实现动态排序,您需要将@Query属性移至 SwiftUI 层次结构中的视图中 - 您需要将其放入子视图中,在其中可以使用依赖项注入提供排序值。 这意味着创建一个新的 SwiftUI,它使用@Query来显示您...
Animation
当指定的值发生变化时,将给定的动画应用于此视图。 struct ContentView: View { @State private var scale = 0.5 var body: some View { VStack { Circle().scale(scale).animation(.easeIn, v...
withAnimation
使用提供的动画重新计算视图主体,并返回结果。 struct ContentView: View { @State private var isActive = false var body: some View { VStack(alignment: isActive ? .trailing : .leading)...
phaseAnimator
一个容器,通过自动循环遍历你提供的一系列阶段来对其内容进行动画处理,每个阶段定义了动画中的一个离散步骤。 具有阶段动画的弹跳 例如,前面展示的表情符号弹跳动画具有两个阶段:向上移动和...
Transaction
当前状态处理更新的上下文。 transaction(value:_:) 使用.transaction 修饰符来更改或替换视图中使用的动画。考虑一个由按钮控制的三个相同视图,同时改变所有三个的情况: 第一个视图通过旋转...
What is a synchronous function? 什么是同步函数?
By default, all Swift functions are synchronous, but what does that mean? A synchronous function is one that executes all its work in a simple, straight line on a single threa...
What is an asynchronous function?什么是异步函数?
Although Swift functions are synchronous by default, we can make them asynchronous by adding one keyword: async. Inside asynchronous functions, we can call other asy...
How to create and call an async function如何创建和调用异步函数
Using async functions in Swift is done in two steps: declaring the function itself as being async, then calling that function using await.在 Swift 中使用异步函数分两步完...
How to call async throwing functions 如何调用异步 throwing 函数
Just like their synchronous counterparts, Swift’s async functions can be throwing or non-throwing depending on how you want them to behave. However, there is a twist: although we ...





