Tasks and task groups共18篇
Understanding how priority escalation works 了解优先级提升的工作原理-Stewed Noodles 资源

Understanding how priority escalation works 了解优先级提升的工作原理

Every task can be created with a specific priority level, or it can inherit a priority from somewhere else. But in two specific circumstances, Swift will raise the priori...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
400
How to cancel a Task 如何取消任务-Stewed Noodles 资源

How to cancel a Task 如何取消任务

Swift’s tasks use cooperative cancellation, which means that although we can tell a task to stop work, the task itself is free to completely ignore that instruction and carry...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
370
How to get a Result from a task 如何从任务中获取 Result-Stewed Noodles 资源

How to get a Result from a task 如何从任务中获取 Result

If you want to read the return value from a Task directly, you should read its value using await, or use try await if it has a throwing operation...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
360
How to create and run a task 如何创建和运行任务-Stewed Noodles 资源

How to create and run a task 如何创建和运行任务

Swift’s Task struct lets us start running some work immediately, and optionally wait for the result to be returned. And it is optional: sometimes you don’t ca...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
0340
How to discard results in a task group 如何丢弃任务组中的结果-Stewed Noodles 资源

How to discard results in a task group 如何丢弃任务组中的结果

Swift has a special task group type called a discarding task group, which has a very specialized function: tasks that complete are automatically discarded and destroyed, ...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
270
How to create a task group and add tasks to it 如何创建任务组并向其添加任务-Stewed Noodles 资源

How to create a task group and add tasks to it 如何创建任务组并向其添加任务

Swift’s task groups are collections of tasks that work together to produce a single result. Each task inside the group must return the same kind of data, but if you use enum assoc...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
260
How to voluntarily suspend a task  如何自愿暂停任务-Stewed Noodles 资源

How to voluntarily suspend a task 如何自愿暂停任务

If you’re executing a long-running task that has few if any suspension points, for example if you’re repeatedly iterating over an intensive loop, you can call Task.yield()&n...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
260
How to run tasks using SwiftUI’s task() modifier 如何使用 SwiftUI 的 task() 修饰符运行任务-Stewed Noodles 资源

How to run tasks using SwiftUI’s task() modifier 如何使用 SwiftUI 的 task() 修饰符运行任务

SwiftUI provides a task() modifier that starts a new task as soon as a view appears, and automatically cancels the task when the view disappears. This is sort of the equi...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
240
How to cancel a task group 如何取消任务组-Stewed Noodles 资源

How to cancel a task group 如何取消任务组

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 ...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
210
How to make async command-line tools and scripts 如何制作异步命令行工具和脚本-Stewed Noodles 资源

How to make async command-line tools and scripts 如何制作异步命令行工具和脚本

If you’re writing a command-line tool with Swift, you can use async code in two ways: if you're using main.swift you can immediately make and use async functions as norm...
jiulinxiri的头像-Stewed Noodles 资源烩之面大会员jiulinxiri1年前
210