如何等待暂停函数在Kotlin中执行其他代码之前完成

Question

我想知道我是否可以等到暂停功能完成之前完成其他代码？ loadParticleswithOutSetCall，我在setparticlepicking的内部称呼，具有悬挂函数。我不希望调用setParticlePicking中的其他任何内容，直到悬挂功能完成为止。请告诉我。

fun setParticlePicking(particlePicking: ParticlePicking) {
    loadParticlesWithoutSetCall()

    manualParticleMarkers?.forEach {
        imageContainerElem.remove(it)
    }
    currentParticlePicking = particlePicking
    manualParticleMarkers = (particlePicking.pickings [imageID]?.map {
        val marker = ManualParticleMarker(it.x, it.y, image = imageElem, trueHeight = particlesDat!!.imageHeight, trueWidth = particlesDat!!.imageWidth, h = particlesDat!!.h(0), w = particlesDat!!.w(0), parentElem = [email protected])
        imageContainerElem.add(marker)
        marker
    }?: mutableListOf()) as MutableList<ManualParticleMarker>
    placeMarkers()
}



fun loadParticlesWithoutSetCall() {
    AppScope.launch {
        // clear everything
        particlesElem.removeAll()


        // load the particles
        val loadingElem = particlesElem.loading("Fetching particles ...")
        val particles: ParticlesData? = try {
            loader()
        } catch (t: Throwable) {
            errorMessage(t)
            null
        } finally {
            particlesElem.remove(loadingElem)
            toWait = true
        }

        particlesDat = particles
    }
}

Answer 1

通过在fun之前添加暂停修饰符，标记两个功能暂停功能。然后移动appscope.launch {}呼叫以将调用打到setParticlePicking，无论它在哪里（您未包含在示例中）。

It should look something like this:

AppScope.launch {
    setParticlePicking(particlePicking)
}

Since you will have removed the AppScope.launch {} call from loadParticlesWithoutSetCall, setParticlePicking will wait for its code to在使用其余代码之前完成之前，因为悬挂功能为默认情况下顺序。