ZLCollectionLeftLayout

left aligned CollectionView layout

• screenshot

中文版

• Description
• Installation
• Usage

Description

• layout collection cell from left to right automatically
• when you set property scrollDirection to .vertical, it will automatically wrap
• when you set property scrollDirection to .horizontal, and you might have to set height of colletion view to show only one line

Installation

cocoapods

• pod 'ZLCollectionLeftLayout'
• or specify a version: pod 'ZLCollectionLeftLayout', '~> 0.1.2'

download framwork

• download the repo.
• and add ZLCollectionLeftLayout.swift to your project

Usage

• import ZLCollectionLeftAlignLayout

  • import ZLCollectionLeftLayout

• set collectionViewLayout of collection view to a instance of ZLCollectionLeftLayout

  • private lazy var collectionView: UICollectionView = {
      // instance ZLCollectionLeftLayout
      let defaultLayout = ZLCollectionLeftLayout()
      defaultLayout.minimumLineSpacing = 10.0
      defaultLayout.minimumInteritemSpacing = 10.0
      defaultLayout.scrollDirection = .vertical
      defaultLayout.sectionInset = UIEdgeInsets(top: 10.0, left: 10.0, bottom: 20.0, right: 10.0)
      // set collectionViewLayout to a instance of ZLCollectionLeftLayout
      let collectionView = UICollectionView(frame: .zero, collectionViewLayout: defaultLayout)
      collectionView.backgroundColor = .magenta
      collectionView.showsVerticalScrollIndicator = false
      return collectionView
    }()

• impletation the method:

  • func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { 
      let w = CGFloat.random(in: 20.0 ... 50.0)
      return CGSize(width: 30.0 + w, height: 25.0)
    }