https://github.com/reactcomponentkit/emojicollection
EmojiCollection is a example for ReactComponentKit
https://github.com/reactcomponentkit/emojicollection
Last synced: 26 days ago
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EmojiCollection is a example for ReactComponentKit
- Host: GitHub
- URL: https://github.com/reactcomponentkit/emojicollection
- Owner: ReactComponentKit
- License: mit
- Created: 2018-08-26T08:24:38.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2019-09-15T06:23:54.000Z (about 6 years ago)
- Last Synced: 2025-04-09T01:41:59.168Z (7 months ago)
- Language: Swift
- Size: 5.97 MB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# EmojiCollection
This is [ReactComponentKit](https://github.com/ReactComponentKit/ReactComponentKit) example. EmojiCollection is built on Components, MVVM and Redux.
## Screenshot
## What is ReactComponentKit
ReactComponentKit is a library for building a UIViewController based on Component. Additionary, It architect UIViewController as Redux with MVVM. If you use ReactComponentKit, You can make many scenes(UIViewController) more easily. You can share components among scenes.
## Using Diff algorithm for UICollectionView and UITableview
ReactComponentKit provides easy way to update UICollectionView and UITableView. Using diff, you can easily insert, delete or shuffle items like below :)
## How to getting start?
### Define Actions
We'll defien three actions for our emoji collection app. AddEmojiAction, RemoveEmojiAction and ShuffleEmojiAction.
#### AddEmojiAction
```swift
struct AddEmojiAction: Action {
let section: Int
let emoji: String
}
```
#### RemoveEmojiAction
```swift
struct RemoveEmojiAction: Action {
let section: Int
let index: Int
}
```
#### ShuffleEmojiAction
```swift
struct ShuffleEmojiAction: Action {
}
```
### Define Reducers
We need three reducers to mutate our state. There is no when statement and type castring for actions. it is just a pure functions.
#### addEmoji
```swift
func addEmoji(state: EmojiCollectionState, action: AddEmojiAction) -> EmojiCollectionState {
return state.copy {
$0.emoji[action.section].append(action.emoji)
}
}
```
#### removeEmoji
```swift
func removeEmoji(state: EmojiCollectionState, action: RemoveEmojiAction) -> EmojiCollectionState {
return state.copy {
$0.emoji[action.section].remove(at: action.index)
}
}
```
#### shuffleEmoji
```swift
func shuffleEmoji(state: EmojiCollectionState, action: ShuffleEmojiAction) -> EmojiCollectionState {
return state.copy {
for (index, var section) in $0.emoji.enumerated() {
section.shuffle()
$0.emoji[index] = section
}
}
}
```
#### makeCollectionViewSectionModels
It is needed for our collection view. UICollectionView in ReactComponentKit is built up on the models for items and sections.
```swift
func makeCollectionViewSectionModels(state: EmojiCollectionState) -> EmojiCollectionState {
let emojiGroupList = state.emoji
let sections = emojiGroupList.enumerated().map { (groupIndex, emojiGroup) -> DefaultSectionModel in
let emojiBoxModels = emojiGroup.map({ (emoji) -> EmojiBoxModel in
EmojiBoxModel(emoji: emoji)
})
let section = DefaultSectionModel(items: emojiBoxModels, header: EmojiSectionHeaderModel(title: " Emoji Section \(groupIndex)"), footer: nil)
section.minimumInteritemSpacing = 0
section.minimumLineSpacing = 2
section.inset = UIEdgeInsets(top: 0, left: 8, bottom: 0, right: 8)
return section
}
return state.copy { $0.sections = sections }
}
```
### Define ViewModel and Action Flows
We need to define ViewModel and in there we should setup store and define action flows.
#### Set up store and define action flows
We can define action flows in initStore block. We couldn't access the store directly so we should access it with initStore method.
```swift
override func setupStore() {
initStore { store in
store.initial(state: EmojiCollectionState())
store.beforeActionFlow(logAction)
store.flow(action: AddEmojiAction.self)
.flow(
addEmoji,
{ state, _ in makeCollectionViewSectionModels(state: state) }
)
store.flow(action: RemoveEmojiAction.self)
.flow(
removeEmoji,
{ state, _ in makeCollectionViewSectionModels(state: state) }
)
store.flow(action: ShuffleEmojiAction.self)
.flow(
shuffleEmoji,
{ state, _ in makeCollectionViewSectionModels(state: state) }
)
}
}
```
#### Define ViewModel
```swift
struct EmojiCollectionState: State {
var emoji: [[String]] = [[], [], []]
var sections: [DefaultSectionModel] = []
var error: RCKError? = nil
}
class EmojiCollectionViewModel: RCKViewModel {
private var emojiGroupList: [[String]]? = nil
let sections = Output<[DefaultSectionModel]>(value: [])
override func setupStore() {
initStore { store in
store.initial(state: EmojiCollectionState())
store.beforeActionFlow(logAction)
store.flow(action: AddEmojiAction.self)
.flow(
addEmoji,
{ state, _ in makeCollectionViewSectionModels(state: state) }
)
store.flow(action: RemoveEmojiAction.self)
.flow(
removeEmoji,
{ state, _ in makeCollectionViewSectionModels(state: state) }
)
store.flow(action: ShuffleEmojiAction.self)
.flow(
shuffleEmoji,
{ state, _ in makeCollectionViewSectionModels(state: state) }
)
}
}
override func on(newState: EmojiCollectionState) {
emojiGroupList = newState.emoji
sections.accept(newState.sections)
}
func randomIndexToDelete(at section: Int) -> Int? {
guard let emojiGroupList = emojiGroupList else { return nil }
guard emojiGroupList[section].count > 0 else { return nil }
return Int(arc4random()) % emojiGroupList[section].count
}
}
```
## MIT License
The MIT License
Copyright © 2018 Sungcheol Kim, https://github.com/ReactComponentKit/EmojiCollectionView
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.