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Counter

★ 53 Open GitHub ↗

Counter is powerful and multipurpose counter

// repository documentation

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![](http://cdn.juanpecatalan.com/images/github/Counter/counter_header_v1.jpg)

**Counter**  is powerful and multipurpose counter.

## Features 🚀

- [x] Easy to use
- [x] Increment/Decrement
- [x] You decide the start value
- [x] Sum several values in a single call
- [x] Use your own objects
- [x] Set Milestones (alarms)
- [x] Automatic counter

### Supported OS & SDK Versions 📋

* iOS 9.0+
* Swift 3

## 🗂 Table of Contents

* [Installation](#-installation)
    * [Cocoapods](#using-cocoapods)
    * [Manual](#manually)
  * [How to use](#-how-to-use)
    * [Advanced](#-advanced)
    * [Milestones](#-milestones)
    * [AutomaticCounter](#-automaticcounter)

## 📲 Installation

#### Using [CocoaPods](https://cocoapods.org)

Edit your `Podfile` and specify the dependency:

```ruby
pod "Counter"
```

#### Manually 💪🏼

If you prefer, you can integrate `Counter` into your project manually. Simply add the `Counter.swift` source file directly into your project.

## 🐒 How to use

Import Counter in proper place.
```swift
import Counter
```
Now, you only need to create a `Counter` instance and start to play 🙂

```swift
let counter = Counter() // 0
counter.increment()     // 1
```

You can specify how many units you want increment the counter

```swift
counter.increment(2)    // 3
```

Also you can decrement the count

```swift
counter.decrement()     // 2
```

And of course you can reset the counter

```swift
counter.reset()         // 0
```

Other powerful feature is that you can sum various values at the same time

```swift
counter.sum(countables: 2, 3, -1)  // 4
```

#### 🤓 Advanced

Can use your own objects to increment the counter. Only need implement `Countable` protocol:

```swift
protocol Countable {
    var deltaValue: Int { get }
}
```

Example:

```swift
struct Person {
    var age: Int
}

extension Person: Countable{
    var deltaValue: Int {
        return self.age
    }
}

let dad = Person(age: 45)
let mum = Person(age: 40)
let son = Person(age: 25)

let ageCounter = Counter()
ageCounter.increment(dad)
ageCounter.increment(mum)
ageCounter.increment(son)

print(ageCounter.currentValue) // 110

// Also you can use `sum` method or static method

ageCounter.sum(countables:dad, mum, son) // 110

let ages = Counter.sum(countables:dad, mum, son) // 110

```

#### 🔔 Milestones

![](http://cdn.juanpecatalan.com/images/github/Counter/milestone.png)

Sometimes you need to know when a counter has reached or will reach a value. With `Counter` will be a piece of cake.
You only need to add `milestones` and conform to `CounterDelegate` protocol. Then, your counter will notify you before reaching and when it reaches each previously defined milestone.

```swift
protocol CounterDelegate{
    func counter(_ counter: Counter, willReachValue value: Int)
    func counter(_ counter: Counter, hasReachedValue value: Int)
    func counter(_ counter: Counter, didChangeValue value: Int)
}
```

To add a new milestone:
```swift
counter.add(milestone: 3)
```

#### ⏱ AutomaticCounter

End counting manually
```swift
let automaticCounter = AutomaticCounter(startIn: 0) // takes default parameters (interval: 1, autoIncrement: 1)
automaticCounter.delegate = self
automaticCounter.automaticDelegate = self
automaticCounter.startCounting()

DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
    automaticCounter.endCounting()
}

/* output
counter(_:didChangeValue:) => 1
counter(_:didChangeValue:) => 2
counter(_:didChangeValue:) => 3
counter(_:didFinishCounting:) => 3
*/
```

End counting at value
```swift
let automaticCounter = AutomaticCounter(startIn: 0, interval: 0.5, autoIncrement: 1)
automaticCounter.delegate = self
automaticCounter.automaticDelegate = self
automaticCounter.startCounting(endingAt: 10)

/* output
counter(_:didChangeValue:) => 1
counter(_:didChangeValue:) => 2
counter(_:didChangeValue:) => 3
counter(_:didChangeValue:) => 4
counter(_:didChangeValue:) => 5
counter(_:didChangeValue:) => 6
counter(_:didChangeValue:) => 7
counter(_:didChangeValue:) => 8
counter(_:didChangeValue:) => 9
counter(_:didChangeValue:) => 10
counter(_:didFinishCounting:) => 10
*/

```

End counting after time interval
```swift
let automaticCounter = AutomaticCounter(startIn: 0, interval: 1)
automaticCounter.delegate = self
automaticCounter.automaticDelegate = self
automaticCounter.startCounting(endingAfter: 3)

/* output
counter(_:didChangeValue:) => 1
counter(_:didChangeValue:) => 2
counter(_:didChangeValue:) => 3
counter(_:didFinishCounting:) => 3
*/
```

## ❤️ Contributed
This is an open source project, so feel free to contribute. How?
- Open an [issue](https://github.com/Juanpe/Counter/issues/new).
- Send feedback via [email](mailto://juanpecatalan.com).
- Propose your own fixes, suggestions and open a pull request with the changes.

See [all contributors](https://github.com/Juanpe/Counter/graphs/contributors)

## 👨🏻‍💻 Author
[1.1]: http://i.imgur.com/tXSoThF.png
[1]: http://www.twitter.com/juanpecatalan

* Juanpe Catalán [![alt text][1.1]][1]

## 👮🏻 License

```
MIT License

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.
```

Counter

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