我想在每次设置某个状态后两秒进行一些操作。
viewModel 内的代码:
var isLoading = mutableStateOf(LoadingState.NONE)
set(value) {
Timber.d("Custom Setter") //Not Firing
//Do something when the state is set to success.
if(value.value == LoadingState.SUCCESS){
viewModelScope.launch {
delay(2000L)
dispatchEvent(//some event)
}
}
field = value
}
set{} 块根本没有运行。但该值设置正确。
当使用委托时by
关键词,
Delegated property cannot have accessors with non-default implementations
有没有办法让自定义设置器适用于 Jetpack Compose 中的 mutableStateOf()?
我想你可以使用快照流 https://developer.android.com/reference/kotlin/androidx/compose/runtime/package-summary#snapshotFlow(kotlin.Function0)对于这个用例。它创建了一个Flow
从给定的组合State
.
var isLoading by mutableStateOf(LoadingState.NONE)
private set
init {
viewModelScope.launch {
snapshotFlow { isLoading }
.collect {
if(it == LoadingState.SUCCESS) {
delay(2000L)
dispatchEvent(//some event)
}
}
}
}
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