Real 文档

语法

RealSignal.Once(signal: RealSignal, callback: (....any) -> ()): RealSignalConnection

参数

名称	类型	描述
`signal`	`RealSignal`	Signal object returned by Signal.new.
`callback`	`(....any) -> ()`	Function called at most once for this connection.

返回值

名称	类型	描述
`connection`	`RealSignalConnection`	Connection object with Disconnect.

说明

Connects a callback that is disconnected before its first callback invocation. The callback receives the arguments passed to Fire.

使用 2 个参数调用: signal, callback。参数表会说明哪些值必填，哪些值只用于细化行为。

返回 connection (RealSignalConnection)。使用返回表区分成功值、nil 结果和可恢复错误。

示例

Connect a callback that runs at most once.

local signal = Signal.new()

signal:Once(function(value)
    print(value)
end)

signal:Fire("first")
signal:Fire("second")

类型

RealSignal

Signal object returned by Signal.new.

Connect (callback: (...any) -> ()) -> RealSignalConnection Adds a callback that runs when Fire is called.Once (callback: (...any) -> ()) -> RealSignalConnection Adds a callback that is disconnected before its first callback invocation.Wait () -> ...any Yields until Fire resumes the waiter with the fired values.Fire (...values: any) -> () Runs connected callbacks and resumes waiters with the provided values.

RealSignalConnection

Connection object returned by RealSignal.Connect and RealSignal.Once.

Disconnect () -> () Disconnects the connection.