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Description

Releasing this library with documentation available on GitHub, an example project, and high test coverage. It's been tested in production by the iOS team at VTS in multiple iOS applications.

Release blog: https://buildingvts.com/idiomatic-swift-safer-view-view-controller-instantiation-ab0c7f41245b

Programming language: Swift
License: MIT License
Tags: Layout     UI     UITableView     Storyboards     iOS     UICollectionView    
Latest version: v2.0.0

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README

ReusableViews

CI Status Version License Platform

Why?

This extension package solves the following problems:

  • Forces your team to adhere to standard practices by:
    • Making storyboard identifiers the same as their class names
    • Making UITableViewCell and UICollectionViewCell reuse identifiers the same as their class name
    • Making UICollectionView supplementary views and UITableViewHeaderFooterView reuse identifiers the same as their class name
  • Removes the need to force unwrap or force cast cells/headers as you dequeue
  • Removes the need to force unwrap or force cast UIViewControllers as you instantiate them from a storyboard

If you're a user of SwiftLint, you'll greatly appreciate the reduced number of warnings and no more need for snippets in the vein of:

guard let cell = tableView.dequeueReusableCell(withIdentifier: "...", for: indexPath) as? MyCustomCellType else {
  fatalError("We didn't get the cell")
}

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Convenient Instantiation of a View From a Nib

Requires that your view conforms to NibLoadableView.

let view = MyNibLoadableView.create()

Instantiation of a UIViewController From a Storyboard

Requires that a class has the same storyboard identifier as its class name.

let myStoryboard: UIStoryboard = ...
let myCustomViewController = myStoryboard.instantiateViewControllerOfType(MyCustomViewController.self) as MyCustomViewController

Dequeueing and Registering a UITableViewCell

Requires that a class has the same reuse identifier as its class name. You must register your cell type first.

// Registration
tableView.register(MyCustomCellType.self)

// Dequeueing
let cell = tableView.dequeueReusableCell(for: indexPath) as MyCustomCellType

Dequeueing and Registering a UICollectionViewCell

Requires that a class has the same reuse identifier as its class name. You must register your cell type first.

// Registration
collectionView.register(MyCustomCellType.self)

// Dequeueing
let cell = collectionView.dequeueReusableCell(for: indexPath) as MyCustomCellType

Dequeueing and Registering a UITableViewHeaderFooterView

Requires that a class has the same reuse identifier as its class name. You must register your cell type first.

// Registration
tableView.register(MyCustomHeaderFooterView.self)

/// Dequeueing
let header = tableView.dequeueReusableHeaderFooterView(inSection: section) as MyCustomHeaderFooterView

Dequeueing and Registering a UICollectionView Supplementary View

Requires that a class has the same reuse identifier as its class name. You must register your view type first.

// Registration
collectionView.register(MyCustomSupplementaryView.self, forSupplementaryViewElementOfKind: .sectionHeader) // or .sectionFooter

// Dequeueing
let view = collectionView.dequeueReusableSupplementaryView(ofKind: .sectionHeader, for: indexPath) as MyCustomSupplementaryView // also takes .sectionFooter

Registering a view backed by a nib

Views backed by nibs must implement the NibLoadableView protocol. The protocol has a pre-defined extension, such that your view doesn't need to add any methods or properties.

class MyCoolCell: UITableViewCell, NibLoadableView {
  ...
}

Installation

ReusableViews is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "ReusableViews"

Author

Hesham Salman, [email protected]

Twitter: @WhatsASoftware

License

ReusableViews is available under the MIT license. See the LICENSE file for more info.


*Note that all licence references and agreements mentioned in the ReusableViews README section above are relevant to that project's source code only.