55 Divide the UICollectionView in each section

Swift3.0 UIViewController.swift // // ViewController.swift // UIKit055_3.0 // // Created by KimikoWatanabe on 2016/08/21. // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource { var myCollectionView : UICollectionView! override func viewDidLoad() { super.viewDidLoad() // CollectionViewのレイアウトを生成. let layout = UICollectionViewFlowLayout() // Cell一つ一つの大きさ. layout.itemSize = CGSize(width:50, height:50) // Cellのマージン. layout.sectionInset = UIEdgeInsetsMake(16, 16, 32, 16) // セクション毎のヘッダーサイズ. layout.headerReferenceSize = CGSize(width:100,height:50) // CollectionViewを生成. myCollectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout) // Cellに使われるクラスを登録. myCollectionView.register(CustomUICollectionViewCell.self, forCellWithReuseIdentifier: "MyCell") myCollectionView.register(UICollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "Section") myCollectionView.delegate = self myCollectionView.dataSource = self self.view.addSubview(myCollectionView) } /* Sectionの数 */ internal func numberOfSections(in collectionView: UICollectionView) -> Int { return 3 } /* Cellが選択された際に呼び出される */ func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { print("Num: \(indexPath.row)") print("SectionNum:\(indexPath.section)") } /* Cellの総数を返す */ func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { // Section毎にCellの総数を変える. switch(section){ case 0: return 5 case 1: return 8 case 2: return 20 default: print("error") return 0 } } /* Sectionに値を設定する */ func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView { let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "Section", for: indexPath) headerView.backgroundColor = UIColor.white return headerView } /* Cellに値を設定する */ func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell : CustomUICollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "MyCell", for: indexPath as IndexPath) as! CustomUICollectionViewCell // Section毎にCellのプロパティを変える. switch(indexPath.section){ case 0: cell.backgroundColor = UIColor.red cell.textLabel?.text = "0" case 1: cell.backgroundColor = UIColor.green cell.textLabel?.text = "1" case 2: cell.backgroundColor = UIColor.blue cell.textLabel?.text = "2" default: print("section error") cell.backgroundColor = UIColor.white } return cell } } CustomUICollectionViewCell.swift // // CustomUICollectionViewCell.swift // UIKit055_3.0 // // Created by KimikoWatanabe on 2016/08/21. // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit class CustomUICollectionViewCell : UICollectionViewCell{ var textLabel : UILabel? required init(coder aDecoder: NSCoder) { super.init(coder: aDecoder)! } override init(frame: CGRect) { super.init(frame: frame) // UILabelを生成. textLabel = UILabel(frame: CGRect(x:0, y:0, width:frame.width, height:frame.height)) textLabel?.text = "nil" textLabel?.textAlignment = NSTextAlignment.center // Cellに追加. self.contentView.addSubview(textLabel!) } } Swift 2.3 UIViewController.swift // // ViewController.swift // UIKit055_2.3 // // Created by KimikoWatanabe on 2016/08/21. // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource { var myCollectionView : UICollectionView! override func viewDidLoad() { super.viewDidLoad() // CollectionViewのレイアウトを生成. let layout = UICollectionViewFlowLayout() // Cell一つ一つの大きさ. layout.itemSize = CGSizeMake(50, 50) // Cellのマージン. layout.sectionInset = UIEdgeInsetsMake(16, 16, 32, 16) // セクション毎のヘッダーサイズ. layout.headerReferenceSize = CGSizeMake(100,50) // CollectionViewを生成. myCollectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout) // Cellに使われるクラスを登録. myCollectionView.registerClass(CustomUICollectionViewCell.self, forCellWithReuseIdentifier: "MyCell") myCollectionView.registerClass(UICollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "Section") myCollectionView.delegate = self myCollectionView.dataSource = self self.view.addSubview(myCollectionView) } /* Sectionの数 */ func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int { return 3 } /* Cellが選択された際に呼び出される */ func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) { print("Num: \(indexPath.row)") print("SectionNum:\(indexPath.section)") } /* Cellの総数を返す */ func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { // Section毎にCellの総数を変える. switch(section){ case 0: return 5 case 1: return 8 case 2: return 20 default: print("error") return 0 } } /* Sectionに値を設定する */ func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView { let headerView = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: "Section", forIndexPath: indexPath) headerView.backgroundColor = UIColor.whiteColor() return headerView } /* Cellに値を設定する */ func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell { let cell : CustomUICollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier("MyCell", forIndexPath: indexPath) as! CustomUICollectionViewCell // Section毎にCellのプロパティを変える. switch(indexPath.section){ case 0: cell.backgroundColor = UIColor.redColor() cell.textLabel?.text = "0" case 1: cell.backgroundColor = UIColor.greenColor() cell.textLabel?.text = "1" case 2: cell.backgroundColor = UIColor.blueColor() cell.textLabel?.text = "2" default: print("section error") cell.backgroundColor = UIColor.whiteColor() } return cell } } CustomUICollectionViewCell.swift // // CustomUICollectionViewCell.swift // UIKit055_2.3 // // Created by KimikoWatanabe on 2016/08/21. // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit class CustomUICollectionViewCell : UICollectionViewCell{ var textLabel : UILabel? required init(coder aDecoder: NSCoder) { super.init(coder: aDecoder)! } override init(frame: CGRect) { super.init(frame: frame) // UILabelを生成. textLabel = UILabel(frame: CGRectMake(0, 0, frame.width, frame.height)) textLabel?.text = "nil" textLabel?.textAlignment = NSTextAlignment.Center // Cellに追加. self.contentView.addSubview(textLabel!) } } 2.3と3.0の差分 UIColorの参照方法が変更(UIColor.grayColor()->UIColor.gray) CGRect,CGPointの初期化方法の変更(CGRectMake,CGPointMakeの廃止) dequeueReusableSupplementaryViewOfKindがdequeueReusableSupplementaryViewに変更 NSIndexPathの廃止、IndexPathに変更 UICollectionViewDelegateのメソッドの引数の変更