AZCollectionView Controller
Features
- Automatic pagination handling
- No more awkward empty CollectionView screen
- AZ CollectionVIew controller give you advantage to connect your (Loading, no result, error ) views via Interface builder
- You can also add your custom xib as dummy views (loading, error, no result)
Installation
CocoaPods
CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:
$ gem install cocoapods
To integrate AZ CollectionVIew controller into your Xcode project using CocoaPods, specify it in your Podfile:
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '10.0'
use_frameworks!
target '<Your Target Name>' do
pod 'AZCollectionViewController'
end
Then, run the following command:
$ pod install
Usage
Step 1
- Extend your view controller from AZCollectionViewController
class ViewController: AZCollectionViewController {
var lastIndex = 0
var results = [String]()
override func viewDidLoad() {
nextLoadingCellNibName = "LoadingCollectionViewCell"
nextLoadingCellIdentifier = "LoadingCollectionViewCell"
loadNextPageLoaderCell(nibName: nextLoadingCellNibName, cellIdentifier: nextLoadingCellIdentifier) // Only if you want personal NextPage loading cell
super.viewDidLoad()
self.fetchData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
Step 2
- Same as AZTableVIewController
- Set the loading views outlet as given below
- Connect collectionView outlet as well
- To load views from custom .xib files
class ViewController: AZCollectionViewController {
override func viewDidLoad() {
self.loadLoadingView(nibName: "your nib name") // if bundle is nil
self.loadErrorView(nibName: "your nib name", bundle: yourBundle) // if custom bundle
super.viewDidLoad()
self.fetchData()
}
}
- If your xibs are in main bundle than use
self.loadLoadingView(nibName: "your nib name") // if bundle is nil
Else use
self.loadLoadingView(nibName: "your nib name", bundle: yourBundle)
Step 3
- And override AZCollectionView cellForRow function.
extension ViewController {
override func AZCollectionView(_ collectionView: UICollectionView, cellForRowAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! TestCollectionViewCell
cell.feedImage.image = UIImage(named: self.results[indexPath.row])
return cell
}
override func AZCollectionView(_ collectionView: UICollectionView, heightForRowAt indexPath: IndexPath) -> CGSize {
return CGSize(width: (collectionView.frame.size.width / 3) - 6, height: (collectionView.frame.size.width / 3) - 4)
}
}
Step 4
- Override two more functions "fetchData" and "fetchNextData"
//MARK: - API Call
extension ViewController {
override func fetchData() {
super.fetchData()
FakeService.getData { (error, results) in
if let resu = results {
self.results.removeAll()
self.results.append(contentsOf: resu)
self.didfetchData(resultCount: resu.count, haveMoreData: true)
}
else if let error = error {
self.errorDidOccured(error: error)
}
}
}
override func fetchNextData() {
super.fetchNextData()
FakeService.getData (offset: results.count) { (error, results) in
if let resu = results {
self.results.append(contentsOf: resu)
if self.results.count < 45 { // you probably get next page exist from service.
self.didfetchData(resultCount: resu.count, haveMoreData: true)
}
else {
self.didfetchData(resultCount: resu.count, haveMoreData: false)
}
}
else if let error = error {
self.errorDidOccured(error: error)
}
}
}
}
Done
Thats it, you successfully integrate AZCollectionViewController
License
AZCollectionViewController is available under the MIT license. See the LICENSE file for more info.
Author
Afroz Zaheer - (https://github.com/AfrozZaheer)
