DataSource

[](https://travis-ci.org/mbuchetics/DataSource) [](https://codecov.io/github/mbuchetics/DataSource?branch=master)

Framework to simplify the setup of UITableView data sources and cells. Separates the model (represented by a generic DataSource) from the representation (TableViewDataSource) by using type-safe cell configurators (TableViewCellConfigurator) to handle the table cell setup in an simple way.

DataSource is not limited to table views but could be extended to collection views or other custom representations as well.

Requirements

iOS 8.0+, Swift 2

Usage

An example app is included demonstrating DataSource's functionality. The example demonstrates various uses cases ranging from a simple list of strings to more complex examples with heterogenous section types.

Getting Started

Create a DataSource with a single section and some rows that all share the same row identifier:

let dataSource = DataSource([
    Section(rowIdentifier: "Text", rows: ["a", "b", "c", "d"])
])

Create a TableViewDataSource with a single TableViewCellConfigurator for the strings:

let tableDataSource = TableViewDataSource(
    dataSource: dataSource,
    configurator: TableViewCellConfigurator("Text") { (title: String, cell: UITableViewCell, indexPath: NSIndexPath) in
        cell.textLabel?.text = "\(indexPath.row): \(title)"
    })

Assign it to your tableView´s dataSource:

tableView.dataSource = tableDataSource

Note: Make sure to keep a strong reference to tableDataSource (e.g. by storing it in a property).

Multiple Sections and Row Types

Create a DataSource with multiple sections and rows:

let dataSource = DataSource([
    Section(title: "B", footer: "Names starting with B", rowIdentifier: "Person", rows: [
        Person(firstName: "Matthias", lastName: "Buchetics"),
        ]),
    Section(title: "M", footer: "Names starting with M", rowIdentifier: "Person", rows: [
        Person(firstName: "Hugo", lastName: "Maier"),
        Person(firstName: "Max", lastName: "Mustermann"),
        ]),
    Section(title: "Strings", rowIdentifier: "Text", rows: [
        "some text",
        "another text"
        ]),
    Section(rowIdentifier: "Button", rows: [
        Button.Add,
        Button.Remove
        ]),
    ])

Create a TableViewDataSource with a TableViewCellConfigurator for each row type:

let tableDataSource = TableViewDataSource(
    dataSource: dataSource,
    configurators: [
        TableViewCellConfigurator("Person") { (person: Person, cell: PersonCell, _) in
            cell.firstNameLabel?.text = person.firstName
            cell.lastNameLabel?.text = person.lastName
        },
        TableViewCellConfigurator("Text") { (title: String, cell: UITableViewCell, _) in
            cell.textLabel?.text = title
        },
        TableViewCellConfigurator("Button") { (button: Button, cell: ButtonCell, _) in
            switch (button) {
            case .Add:
                cell.titleLabel?.text = "Add"
                cell.backgroundColor = UIColor(red: 0, green: 0.7, blue: 0.2, alpha: 0.8)
            case .Remove:
                cell.titleLabel?.text = "Remove"
                cell.backgroundColor = UIColor(red: 1, green: 0, blue: 0, alpha: 0.8)
            }
        },
    ])

Assign it to your tableView´s dataSource and again make sure to keep a strong reference to the data source.

Creating rows using a creator closure

Instead of setting an array of rows you can also instantiate rows using a closure:

let dataSource = DataSource([
    Section(title: "test", rowCountClosure: { return 5 }, rowCreatorClosure: { (rowIndex) in
        return Row(identifier: "Text", data: ((rowIndex + 1) % 2 == 0) ? "even" : "odd")
    }),
    Section<Any>(title: "mixed", rowCountClosure: { return 5 }, rowCreatorClosure: { (rowIndex) in
        if rowIndex % 2 == 0 {
            return Row(identifier: "Text", data: "test")
        }
        else {
           return Row(identifier: "Person", data: Person(firstName: "Max", lastName: "Mustermann"))
        }
    })
    ])

Create a TableViewDataSource with cell configurators as shown above.

Convenience

Several extensions on Array and Dictionary exist to make creating data sources even easier.

Create a data source with a single section based on an array:

let dataSource = ["a", "b", "c", "d"].toDataSource("Text")

Create a data source based on a dictionary, using it's keys as the section titles:

let data = [
    "section 1": ["a", "b", "c"],
    "section 2": ["d", "e", "f"],
    "section 3": ["g", "h", "i"],
]

let dataSource = data.toDataSource("Text", orderedKeys: data.keys.sort())

Note: Because dictionaries are unordered, it's required to provide an array of ordered keys as well.

Realm Support

Check out RealmDataSource to create data sources based on Realm queries.

Installation

Carthage

Add the following line to your Cartfile.

github "mbuchetics/DataSource", ~> 1.0

Then run carthage update.

Manually

Just drag and drop the .swift files in the DataSource folder into your project.

License

DataSource is available under the MIT license. See the LICENSE file for details.

Contact

Contact me at matthias.buchetics.com or follow me on Twitter.

Made with ❤ at all about apps.