如何将暂停函数作为参数传递给另一个函数? Kotlin协程 [英] how to pass suspend function as parameter to another function? Kotlin Coroutines

问题描述

我想将暂停函数作为参数发送，但是它显示修饰符'suspend'不适用于'value parameter'.怎么做?

I want to send suspending function as a parameter, but it shows " Modifier 'suspend' is not applicable to 'value parameter" . how to do it?

fun MyModel.onBG(suspend bar: () -> Unit) {
  launch {
    withContext(Dispatchers.IO) {
        bar()
    }

  }
}

推荐答案

Lambda的suspend修饰符应放在冒号后面，而不是前面.示例:

Lambda's suspend modifier should be placed after the colon character, not in front. Example:

fun MyModel.onBG(bar: suspend () -> Unit) {
  launch {
    withContext(Dispatchers.IO) {
      bar()
    }
  }
}

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