HGPlaceholders

Example

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

Requirements

iOS 8.0+
Xcode 9.2

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Installation

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

pod 'HGPlaceholders'

HGPlaceholders is also available through Carthage. To install it, simply add the following line to your Cartfile:

github "HamzaGhazouani/HGPlaceholders"

Usage

Inherit your UITableView class from TableView Or inherit UICollectionView from CollectionView
Call the placeholder to show

tableView.showLoadingPlaceholder() or collectionView.showLoadingPlaceholder()
tableView.showNoResultsPlaceholder() or collectionView.showNoResultsPlaceholder()
tableView.showErrorPlaceholder() or collectionView.showErrorPlaceholder()
tableView.showNoConnectionPlaceholder() or collectionView.showNoConnectionPlaceholder()

Customization

If you want to change only images, just set them in your asset with this names (the framework check firstly in the main bundle):

loading : "hg_default-loading"
no_connection : "hg_default-no_connection"
no_results : "hg_default-no_results"
error : "hg_default-error"

The framework contains different defaults placeholders:

Basic :

tableView.placeholdersProvider = .basic or collectionView.placeholdersProvider = .basic

Default :

tableView.placeholdersProvider = .default or collectionView.placeholdersProvider = .default

Default2 :

tableView.placeholdersProvider = .default2 or collectionView.placeholdersProvider = .default2

Hallowen :

tableView.placeholdersProvider = .halloween or collectionView.placeholdersProvider = .halloween // for fun :)`

If you want to change the default palceholders for all table views in your project:

class ProjectNameTableView: TableView {

    override func customSetup() {
        placeholdersProvider = .basic
    }
}

class ProjectNameCollectionView: CollectionView {

    override func customSetup() {
        placeholdersProvider = .basic
    }
}

You can also add new placeholders fully customizable, you should keep in mind that the view will take table view frame, and placeholder can have only one action, please check the example project

Creating a new theme from scratch

static var summer: PlaceholdersProvider {
        
        var commonStyle = PlaceholderStyle()
        commonStyle.backgroundColor = UIColor(red: 1.0, green: 236.0/255, blue: 209.0/255.0, alpha: 1.0)
        commonStyle.actionBackgroundColor = .black
        commonStyle.actionTitleColor = .white
        commonStyle.titleColor = .black
        commonStyle.isAnimated = false
        
        commonStyle.titleFont = UIFont(name: "AvenirNextCondensed-HeavyItalic", size: 19)!
        commonStyle.subtitleFont = UIFont(name: "AvenirNextCondensed-Italic", size: 19)!
        commonStyle.actionTitleFont = UIFont(name: "AvenirNextCondensed-Heavy", size: 19)!
        
        var loadingStyle = commonStyle
        loadingStyle.actionBackgroundColor = .clear
        loadingStyle.actionTitleColor = .gray
        
        var loadingData: PlaceholderData = .loading
        loadingData.image = #imageLiteral(resourceName: "summer-hat")
        let loading = Placeholder(data: loadingData, style: loadingStyle, key: .loadingKey)
        
        var errorData: PlaceholderData = .error
        errorData.image = #imageLiteral(resourceName: "summer-ball")
        let error = Placeholder(data: errorData, style: commonStyle, key: .errorKey)
        
        var noResultsData: PlaceholderData = .noResults
        noResultsData.image = #imageLiteral(resourceName: "summer-cocktail")
        let noResults = Placeholder(data: noResultsData, style: commonStyle, key: .noResultsKey)
        
        var noConnectionData: PlaceholderData = .noConnection
        noConnectionData.image = #imageLiteral(resourceName: "summer-beach-slippers")
        let noConnection = Placeholder(data: noConnectionData, style: commonStyle, key: .noConnectionKey)
        
        let placeholdersProvider = PlaceholdersProvider(loading: loading, error: error, noResults: noResults, noConnection: noConnection)
        
        let xibPlaceholder = Placeholder(cellIdentifier: "CustomPlaceholderCell", key: PlaceholderKey.custom(key: "XIB"))
        
        placeholdersProvider.add(placeholders: xibPlaceholder)
        
        return placeholdersProvider
    }

Adding a custom placeholder to an existing theme

   private static var starWarsPlaceholder: Placeholder {
       var starwarsStyle = PlaceholderStyle()
       starwarsStyle.backgroundColor = .black
       starwarsStyle.actionBackgroundColor = .clear
       starwarsStyle.actionTitleColor = .white
       starwarsStyle.titleColor = .white
       starwarsStyle.isAnimated = false
       
       var starwarsData = PlaceholderData()
       starwarsData.title = NSLocalizedString("\"This is a new day, a\nnew beginning\"", comment: "")
       starwarsData.subtitle = NSLocalizedString("Star Wars", comment: "")
       starwarsData.image = #imageLiteral(resourceName: "star_wars")
       starwarsData.action = NSLocalizedString("OK!", comment: "")
       
       let placeholder = Placeholder(data: starwarsData, style: starwarsStyle, key: PlaceholderKey.custom(key: "starWars"))
       
       return placeholder
   }
   
   let provider = PlaceholdersProvider.summer 
   provider.addPlaceholders(MyUtilityClass.starWarsPlaceholder)