withContext
suspend fun <T> withContext(
context: CoroutineContext,
block: suspend CoroutineScope.() -> T
): T (source)
Calls the specified suspending block with a given coroutine context, suspends until it completes, and returns the result.
suspend fun <R> coroutineScope(
block: suspend CoroutineScope.() -> R
): R (source)
Creates a CoroutineScope and calls the specified suspend block with this scope. The provided scope inherits its coroutineContext from the outer scope, but overrides the context’s Job.
withContext采用CoroutineContext，并且似乎都complete在其所有子级完成之后。
在什么情况下，withContext或者coroutineScope应该比其他的首选？ …