# FullyConnectedNetworkClassifier A classifier that uses a fully connected network. ``` struct FullyConnectedNetworkClassifier where Scalar : MLShapedArrayScalar, Scalar : BinaryFloatingPoint, Label : Comparable, Label : Decodable, Label : Encodable, Label : Hashable ``` ## Topics ### Creating the classifier [`init(labels: Set, configuration: FullyConnectedNetworkConfiguration)`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/init(labels:configuration:)) Creates a fully connected network classifier. ### Getting the properties [`var labels: Set`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/labels) The set of possible labels. [`var configuration: FullyConnectedNetworkConfiguration`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/configuration) The fully-connected-network configuration. ### Encoding and decoding [`func encodeWithOptimizer(FullyConnectedNetworkClassifier.Transformer, to: inout any EstimatorEncoder) throws`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/encodeWithOptimizer(_:to:)) Encodes a fitted transformer with an optimizer. [`func decode(from: inout any EstimatorDecoder) throws -> FullyConnectedNetworkClassifierModel`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/decode(from:)) Decodes the estimator. ### Fitting a classifier [`func fitted(to: Input, eventHandler: EventHandler?) async throws -> FullyConnectedNetworkClassifierModel`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/fitted(to:eventHandler:)) Fits a fully connected network classifier model to a sequence of examples. [`func fitted(to: Input, validateOn: Validation, eventHandler: EventHandler?) async throws -> FullyConnectedNetworkClassifierModel`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/fitted(to:validateOn:eventHandler:)) Fits a fully connected network classifier model to a sequence of examples. [`typealias Annotation`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/Annotation) The annotation type. [`typealias Transformer`](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/Transformer) The transformer type created by this estimator. ### Default Implementations [SupervisedEstimator Implementations](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/SupervisedEstimator-Implementations) [UpdatableSupervisedEstimator Implementations](/documentation/CreateMLComponents/FullyConnectedNetworkClassifier/UpdatableSupervisedEstimator-Implementations) ## Relationships ### Conforms To [`UpdatableSupervisedEstimator`](/documentation/CreateMLComponents/UpdatableSupervisedEstimator) [`Copyable`](/documentation/Swift/Copyable) [`Sendable`](/documentation/Swift/Sendable) [`Escapable`](/documentation/Swift/Escapable) [`SupervisedEstimator`](/documentation/CreateMLComponents/SupervisedEstimator) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)