# MultiSlider
UISlider clone with multiple thumbs and values, range highlight, optional snap values, optional value labels, either vertical or horizontal.
[![Swift Version][swift-image]][swift-url]
[![Build Status][travis-image]][travis-url]
[![License][license-image]][license-url]
[](https://img.shields.io/cocoapods/v/MultiSlider.svg)
[](http://cocoapods.org/pods/MultiSlider)
[](http://makeapullrequest.com)
## Features
* Multiple thumbs
* Range slider (optional) - track color between thumbs different from track color outside thumbs
* Vertical (optional)
* Value labels (optional)
* Snap steps or specific snap values (optional)
* Haptic feedback (optional)
* Configurable thumb image, minimum and maximum images.
* Configurable track width, color, rounding.
## Usage
```swift
let slider = MultiSlider()
slider.minimumValue = 1 // default is 0.0
slider.maximumValue = 5 // default is 1.0
slider.value = [1, 4.5, 5]
slider.addTarget(self, action: #selector(sliderChanged(_:)), for: .valueChanged) // continuous changes
slider.addTarget(self, action: #selector(sliderDragEnded(_:)), for: . touchUpInside) // sent when drag ends
```
### SwiftUI Usage
```swift
@State var valueArray: [CGFloat] = [7, 13]
// ...
MultiValueSlider(value: $valueArray, minimumValue: 1, maximumValue: 5)
```
The properties mentioned below can be used as modifiers, or passed as arguments to the `MultiValueSlider` initializer. For example:
```swift
MultiValueSlider(value: $valueArray, outerTrackColor: .lightGray)
.thumbTintColor(.blue)
```
### Getting multiple thumb values
Use `value` to get all thumbs values, and `draggedThumbIndex` to find which thumb was last moved.
```swift
func sliderChanged(slider: MultiSlider) {
print("thumb \(slider.draggedThumbIndex) moved")
print("now thumbs are at \(slider.value)") // e.g., [1.0, 4.5, 5.0]
}
```
### Range slider
```swift
slider.outerTrackColor = .lightGray // outside of first and last thumbs
```
### Vertical / horizontal orientation
```swift
slider.orientation = .horizontal // default is .vertical
slider.isVertical = false // same effect, but accessible from Interface Builder
```
### Value labels
```swift
slider.valueLabelPosition = .left // .notAnAttribute = don't show labels
slider.valueLabelAlternatePosition = true // alternate left and right positions (false by default)
slider.isValueLabelRelative = true // show differences between thumbs instead of absolute values
slider.valueLabelFormatter.positiveSuffix = " 𝞵s"
slider.valueLabelColor = .green
slider.valueLabelFont = someFont
```
For more control over the label text:
```swift
slider.valueLabelTextForThumb = { thumbIndex, thumbValue in
["Parasol", "Umbrella"][thumbIndex] + " \(thumbValue)"
}
```
### Snap steps
```swift
slider.snapStepSize = 0.5 // default is 0.0, i.e. don't snap
slider.snapValues = [1, 2, 4, 8] // specify specific snap values instead uniform steps
slider.isHapticSnap = false // default is true, i.e. generate haptic feedback when sliding over snap values
slider.snapImage = UIImage(systemName: "circle.fill") // default: no image
```
### Changing Appearance
```swift
slider.tintColor = .cyan // color of track
slider.thumbTintColor = .blue // color of thumbs
slider.trackWidth = 32
slider.hasRoundTrackEnds = true
slider.showsThumbImageShadow = false // wide tracks look better without thumb shadow
slider.centerThumbOnTrackEnd = true // when thumb value is minimum or maximum, align it's center with the track end instead of its edge
```
### Images
```swift
// add images at the ends of the slider:
slider.minimumImage = UIImage(named: "clown")
slider.maximumImage = UIImage(named: "cloud")
// change image for all thumbs:
slider.thumbImage = UIImage(named: "balloon")
// or let each thumb have a different image:
slider.thumbViews[0].image = UIImage(named: "ball")
slider.thumbViews[1].image = UIImage(named: "club")
// expand drag area when using a small thumb image:
slider.thumbTouchExpansionRadius = 16
```
### Distance/Overlap Between Thumbs
```swift
// allow thumbs to overlap:
slider.keepsDistanceBetweenThumbs = false
// make thumbs keep a greater distance from each other (default = half the thumb size):
slider.distanceBetweenThumbs = 3.14
```
### Disabling/freezing thumbs
```swift
slider.disabledThumbIndices = [1, 3]
```
## Requirements
- iOS 9.0+
- Xcode 10
## Installation
### CocoaPods:
```ruby
pod 'MultiSlider'
```
Legacy versions:
| Swift version | MultiSlider version |
| :---: | :--- |
| 4.0 (Xcode 9.4) | `pod 'MiniLayout', '~> 1.2.1'`
`pod 'MultiSlider', '~> 1.6.0'` |
| 3 | `pod 'MiniLayout', '~> 1.1.0'`
`pod 'MultiSlider', '~> 1.1.2'` |
| 2.3 | `pod 'MiniLayout', '~> 1.0.1'`
`pod 'MultiSlider', '~> 1.0.1'` |
### Swift Package Manager:
```swift
dependencies: [
.package(url: "https://github.com/yonat/MultiSlider", from: "2.2.0")
]
```
## Meta
[@yonatsharon](https://twitter.com/yonatsharon)
[https://github.com/yonat/MultiSlider](https://github.com/yonat/MultiSlider)
[swift-image]:https://img.shields.io/badge/swift-5.0-orange.svg
[swift-url]: https://swift.org/
[license-image]: https://img.shields.io/badge/License-MIT-blue.svg
[license-url]: LICENSE.txt
[travis-image]: https://img.shields.io/travis/dbader/node-datadog-metrics/master.svg?style=flat-square
[travis-url]: https://travis-ci.org/dbader/node-datadog-metrics