---
title: "init(source:labels:weights:lossDescriptor:)"
framework: metalperformanceshaders
role: symbol
role_heading: Initializer
path: "metalperformanceshaders/mpsnnforwardlossnode/init(source:labels:weights:lossdescriptor:)-9bsd7"
---

# init(source:labels:weights:lossDescriptor:)

## Declaration

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