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SACollectionViewVerticalScalingFlowLayout

★ 271 Open GitHub ↗

UICollectionViewLayout that performs scaling up and down automatically on disappearing cells, and applies UIDynamics.

// repository documentation

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# SACollectionViewVerticalScalingFlowLayout

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## About

SACollectionViewVerticalScalingFlowLayout applies scaling up or down effect to appearing or disappearing cells. In addition, animation of UIDynamics applies each cell.

![sample1](https://raw.githubusercontent.com/marty-suzuki/SACollectionViewVerticalScalingFlowLayout/master/SampleImage/sample1.gif) ![sample2](https://raw.githubusercontent.com/marty-suzuki/SACollectionViewVerticalScalingFlowLayout/master/SampleImage/sample2.gif)

[ManiacDev.com](https://maniacdev.com/) referred.  
[https://maniacdev.com/2015/07/open-source-uicollectionview-layout-that-automatically-scales-images-scrolling-inout-of-view](https://maniacdev.com/2015/07/open-source-uicollectionview-layout-that-automatically-scales-images-scrolling-inout-of-view)

## Features

- [x] Vertical Scaling
- [x] Rewrite in Swift 
- [x] Support Horizonal Scaling
- [x] Supoort Swift2.3
- [x] Support Swift3

## Installation

#### CocoaPods

SACollectionViewVerticalScalingFlowLayout is available through [CocoaPods](http://cocoapods.org). If you have cocoapods 1.1.0.rc.2 or greater, you can install
it, simply add the following line to your Podfile:

pod "SACollectionViewVerticalScalingFlowLayout"

## Usage

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

#### From Storyboard or Xib

Go to 'Attributes Inspector' of Storyboard or Xib, and set Layout tab 'Custom'. And set class tab 'SACollectionViewVerticalScalingFlowLayout'.

![Alert](https://raw.githubusercontent.com/marty-suzuki/SACollectionViewVerticalScalingFlowLayout/master/SampleImage/CollectionView.png)

#### From Code

Write this code at viewDidLoad method and so on.

```swift

collectionView.registerClass(SACollectionViewVerticalScalingCell.self, forCellWithReuseIdentifier:kCellIdentifier)
let layout = SACollectionViewVerticalScalingFlowLayout()
layout.scaleMode = .hard
layout.alphaMode = .easy
layout.scrollDirection = .Vertical
collectionView.collectionViewLayout = layout
    
```

if you want to use Horizontal mode.

```swift

layout.scrollDirection = .horizontal

```

## Customization

You can customize scaling and alpha of apearing or disapering cells.

#### For Scale

You can change alpha to set ScaleModeType for scaleMode property of SACollectionViewVerticalScalingFlowLayout.(default: .easy)

```swift

var scaleMode: SACollectionViewVerticalScalingFlowLayoutScaleMode

enum SACollectionViewVerticalScalingFlowLayoutScaleMode {
    case none, easy, hard
}

```

#### For Alpha

You can change alpha to set AlphaModeType for alphaMode property of SACollectionViewVerticalScalingFlowLayout. (default: .easy)

``` swift
	
var alphaMode: SACollectionViewVerticalScalingFlowLayoutScaleMode
	
enum SACollectionViewVerticalScalingFlowLayoutAlphaMode {
    case none, easy, hard
}

```

#### For Cell

You use containerView instead of contentView like this code, then you can add what kind of view you want to add.

``` swift

let cell = collectionView.dequeueReusableCellWithReuseIdentifier(kCellIdentifier, forIndexPath: indexPath)
let imageView = UIImageView(frame: cell.bounds)
imageView.image = UIImage(named: "cat")
cell.containerView?.addSubview(imageView)

```

## Requirements
- Xcode 8 or greater
- iOS 8 or greater
- ARC

## Author

Taiki Suzuki, s1180183@gmail.com

## License

SACollectionViewVerticalScalingFlowLayout is available under the MIT license. See the LICENSE file for more info.

SACollectionViewVerticalScalingFlowLayout

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