---
title: "init(source:labels:lossDescriptor:)"
framework: metalperformanceshaders
role: symbol
role_heading: Initializer
path: "metalperformanceshaders/mpsnnforwardlossnode/init(source:labels:lossdescriptor:)"
---

# init(source:labels:lossDescriptor:)

## Declaration

```swift
init(source: MPSNNImageNode, labels: MPSNNImageNode, lossDescriptor descriptor: MPSCNNLossDescriptor)
```