---
title: "init(_:children:columnCustomization:columns:)"
framework: swiftui
role: symbol
role_heading: Initializer
path: "swiftui/table/init(_:children:columncustomization:columns:)"
---

# init(_:children:columnCustomization:columns:)

Creates a hierarchical table that computes its rows based on a collection of identifiable data and key path to the children of that data.

## Declaration

```swift
nonisolated init<Data>(_ data: Data, children: KeyPath<Value, Data?>, columnCustomization: Binding<TableColumnCustomization<Value>>? = nil, @TableColumnBuilder<Value, Never> columns: () -> Columns) where Rows == TableOutlineGroupContent<Data>, Data : RandomAccessCollection, Columns.TableRowValue == Data.Element
```

## Parameters

- `data`: The identifiable data for computing the table rows.
- `children`: A key path to a property whose non-nil value gives the children of data, and whose nil value represents a leaf row of the hierarchy, which is not capable of having children.
- `columnCustomization`: A binding to the state of columns.
- `columns`: The columns to display in the table.

## Discussion

Discussion Each column in the table that should participate in customization is required to have an identifier, specified with customizationID(_:).

## See Also

### Creating a hierarchical table

- [init(_:children:selection:columnCustomization:columns:)](swiftui/table/init(_:children:selection:columncustomization:columns:).md)
- [init(_:children:selection:sortOrder:columnCustomization:columns:)](swiftui/table/init(_:children:selection:sortorder:columncustomization:columns:).md)
- [init(_:children:sortOrder:columnCustomization:columns:)](swiftui/table/init(_:children:sortorder:columncustomization:columns:).md)