---
title: MPSNNOptimizer
framework: metalperformanceshaders
role: symbol
role_heading: Class
path: metalperformanceshaders/mpsnnoptimizer
---

# MPSNNOptimizer

The base class for optimization layers.

## Declaration

```swift
class MPSNNOptimizer
```

## Topics

### Instance Properties

- [applyGradientClipping](metalperformanceshaders/mpsnnoptimizer/applygradientclipping.md)
- [gradientClipMax](metalperformanceshaders/mpsnnoptimizer/gradientclipmax.md)
- [gradientClipMin](metalperformanceshaders/mpsnnoptimizer/gradientclipmin.md)
- [gradientRescale](metalperformanceshaders/mpsnnoptimizer/gradientrescale.md)
- [learningRate](metalperformanceshaders/mpsnnoptimizer/learningrate.md)
- [regularizationScale](metalperformanceshaders/mpsnnoptimizer/regularizationscale.md)
- [regularizationType](metalperformanceshaders/mpsnnoptimizer/regularizationtype.md)

### Instance Methods

- [setLearningRate(_:)](metalperformanceshaders/mpsnnoptimizer/setlearningrate(_:).md)

## Relationships

### Inherits From

- [MPSKernel](metalperformanceshaders/mpskernel.md)

### Inherited By

- [MPSNNOptimizerAdam](metalperformanceshaders/mpsnnoptimizeradam.md)
- [MPSNNOptimizerRMSProp](metalperformanceshaders/mpsnnoptimizerrmsprop.md)
- [MPSNNOptimizerStochasticGradientDescent](metalperformanceshaders/mpsnnoptimizerstochasticgradientdescent.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)

## See Also

### Optimization Layers

- [MPSNNOptimizerAdam](metalperformanceshaders/mpsnnoptimizeradam.md)
- [MPSNNOptimizerRMSProp](metalperformanceshaders/mpsnnoptimizerrmsprop.md)
- [MPSNNOptimizerStochasticGradientDescent](metalperformanceshaders/mpsnnoptimizerstochasticgradientdescent.md)
- [MPSNNOptimizerDescriptor](metalperformanceshaders/mpsnnoptimizerdescriptor.md)