当 Lambda 表达式或匿名函数只接收 一个参数 时，it 会作为这个参数的 隐式名称（默认参数名）。 val numbers = listOf(1, 2, 3, 4, 5) // it 表示参数 println(numbers.map { it * it }) // [1...

Scrolling Column Modifier.verticalScroll(scrollState) 将 Column 变为可滚动。 @Composable fun ScrollingColumn() { // 创建一个滚动状态 val scrollState = rememberScrollState() Column(...

创建 Screen HomeScreen 的可组合函数 @Composable fun HomeScreen() { Column( modifier = Modifier.fillMaxSize(), horizontalAlignment = Alignment.CenterHorizontally ) { Button( onClick...

猜单词游戏的基本业务流程如下所示 生成单词，检测答案 生成随机单词，并检测用户输入的单词是否在选定的单词中 import random word_list = ['aardvark', 'baboon', 'camel'] chosen_word = ran...

Widget 的 Container Background（容器背景） 是在 iOS 17 中引入的。在 Widget 的开发过程中，可能会在预览中遇到如下的错误 Widget needs to adopt container background. 容器背景用途 iOS 1...

您将使用 @Model 宏来定义所有 SwiftData 模型类。该宏会自动使您的类能够从 SwiftData 加载和存储数据，支持观察更改，并添加 Hashable、Identifiable、Observable 和 PersistentModel 的遵循...

There are only three differences between creating an AsyncSequence and creating a regular Sequence, none of which are complicated.创建 AsyncSequence 和创建...

Swift’s task groups can be cancelled in one of three ways: if the parent task of the task group is cancelled, if you explicitly call cancelAll() on the group, or if one of your ...

Each task in a Swift task group must return the same type of data as all the other tasks in the group, which is often problematic – what if you need one task group to handle ...

Previously I talked about the concept of thread explosion, which is when you create many more threads than CPU cores and the system struggles to manage them effectively. Howev...