Jetpack compose TopAppBar gives a call error

Question

I get an error when I write the following in Jetpack compose TopAppBar. I think it's a rudimentary mistake, but I don't know. write error

TopAppBar( // ← error:None of the following functions can be called with the arguments supplied.
    title = Text(text = "hogrhoge"),
    actions = {IconButton(...)}

Answer 1

Parameter title is of type @Composable () -> Unit, which means you have to pass composable function there. You are instead passing value returned from Text function, which is Unit. And it's the same with actions parameter. What you should do is this:

TopAppBar(
    title = { Text(...) },
    actions = { IconButton(...) },
    ...
)