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એݴత
6*$PMMFDUJPO7JFX
JTILBXB
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w גࣜձࣾ9$50
w 4XJGU
,PUMJO
(P
+BWB4DSJQU
w "1*,JU
%*,JU
w 4XJGU࣮ફೖ
J041SPHSBNNJOH
JTILBXB
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No content
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࣮͠·͢
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class VenueDetailViewController: UIViewController {
var venue: Venue
var reviews: [Review]
var relatedVenues: [Venue]
}
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func collectionView(
_ collectionView: UICollectionView,
numberOfItemsInSection section: Int) -> Int {
switch section {
case 0:
return 1
case 1:
return reviews.count
case 2:
return relatedVenues.count
default:
fatalError("unknown section \(section)")
}
}
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func collectionView(
_ collectionView: UICollectionView,
cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch indexPath.section {
case 0:
let cell = collectionView.dequeueReusableCell(
withReuseIdentifier: "VenueOutline", for: indexPath) as! VenueOutlineCell
cell.bind(venue)
return cell
case 1:
let cell = collectionView.dequeueReusableCell(
withReuseIdentifier: "Review", for: indexPath) as! ReviewCell
cell.bind(reviews[indexPath.item])
return cell
case 2:
let cell = collectionView.dequeueReusableCell(
withReuseIdentifier: "RelatedVenue", for: indexPath) as! RelatedVenueCell
cell.bind(relatedVenues[indexPath.item])
return cell
default:
fatalError()
}
}
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func collectionView(
_ collectionView: UICollectionView,
viewForSupplementaryElementOfKind kind: String,
at indexPath: IndexPath) -> UICollectionReusableView {
guard kind == UICollectionView.elementKindSectionHeader else {
fatalError()
}
switch indexPath.section {
case 1:
let view = collectionView.dequeueReusableCell(
withReuseIdentifier: "SectionHeader", for: indexPath) as! SectionHeaderCell
view.bind("Reviews")
return view
case 2:
let view = collectionView.dequeueReusableCell(
withReuseIdentifier: "SectionHeader", for: indexPath) as! SectionHeaderCell
view.bind("Related Venues")
return view
default:
fatalError()
}
}
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func collectionView(
_ collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
referenceSizeForHeaderInSection section: Int) -> CGSize {
let flowLayout = collectionViewLayout as! UICollectionViewFlowLayout
switch section {
case 0:
return .zero
case 1:
return reviews.isEmpty ? .zero : flowLayout.headerReferenceSize
case 2:
return relatedVenues.isEmpty ? .zero : flowLayout.headerReferenceSize
default:
fatalError()
}
}
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w ίʔυ͔Β݁Ռ͕૾ͮ͠Β͍
w JOEFYʹґଘͨ݅͠ذ͕͋Ϳͳ͍༧ײ
w ݅ذ͕ॏෳ͍ͯ͠ΔͷͰߋʹ͋Ϳͳ͍
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ͳΜͱ͔͠Α͏
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ॲཧͷϑϩʔΛͬͯΈΔ
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7FOVF%FUBJM7JFX$POUSPMMFS 6*$PMMFDUJPO7JFX
switch section {
case 0:
return 1
case 1:
return reviews.count
case 2:
return relatedVenues.count
default:
fatalError()
}
w WFOVF
w SFWJFXT
w SFMBUFE7FOVFT
ηϧͷʁ
Ͱ͢ʂ
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7FOVF%FUBJM7JFX$POUSPMMFS 6*$PMMFDUJPO7JFX
൪ͷηϧʁ
7FOVF0VUMJOF$FMMͰ͢ʂ
switch indexPath.section {
case 0:
let cell = collectionView.dequeueReusableCell(
withReuseIdentifier: "VenueOutline", for: indexPath) as! VenueOutlineCell
cell.bind(venue)
return cell
case 1:
let cell = collectionView.dequeueReusableCell(
withReuseIdentifier: "Review", for: indexPath) as! ReviewCell
cell.bind(reviews[indexPath.item])
return cell
case 2:
let cell = collectionView.dequeueReusableCell(
withReuseIdentifier: "RelatedVenue", for: indexPath) as! RelatedVenueCell
cell.bind(relatedVenues[indexPath.item])
return cell
default:
fatalError()
}
w WFOVF
w SFWJFXT
w SFMBUFE7FOVFT
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าҾ͍ͯଊ͑ͯΈΔ
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7FOVF%FUBJM7JFX$POUSPMMFS 6*$PMMFDUJPO7JFX
w WFOVF
w SFWJFXT
w SFMBUFE7FOVFT
w OVNCFS0G*UFNT
w DFMM'PS*UFN"U
σʔλม
ঢ়ଶΛද͢σʔλ 6*$PMMFDUJPO7JFXͷσʔλ
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7FOVF%FUBJM7JFX$POUSPMMFS 6*$PMMFDUJPO7JFX
ঢ়ଶΛද͢σʔλ 6*$PMMFDUJPO7JFXͷσʔλ
w OVNCFS0G*UFNT
w DFMM'PS*UFN"U
ϝιου͝ͱʹ
σʔλม
w WFOVF
w SFWJFXT
w SFMBUFE7FOVFT
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ʮঢ়ଶΛද͢σʔλʯ͔Β
ʮ6*$PMMFDUJPO7JFXͷσʔλʯԕ͍ͷʹ
ϝιου͝ͱʹΠν͔Βม͍ͯ͠Δ
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σʔλมΛ؍͢Δ
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func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
switch section {
case 0:
return 1
case 1:
return reviews.count
case 2:
return relatedVenues.count
default:
fatalError("unknown section \(section)")
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch indexPath.section {
case 0:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "VenueOutline", for: indexPath) as! VenueOutlineCell
cell.bind(venue)
return cell
case 1:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Review", for: indexPath) as! ReviewCell
cell.bind(reviews[indexPath.item])
return cell
case 2:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "RelatedVenue", for: indexPath) as! RelatedVenueCell
cell.bind(relatedVenues[indexPath.item])
return cell
default:
fatalError()
}
}
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func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
switch section {
case 0:
return 1
case 1:
return reviews.count
case 2:
return relatedVenues.count
default:
fatalError("unknown section \(section)")
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch indexPath.section {
case 0:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "VenueOutline", for: indexPath) as! VenueOutlineCell
cell.bind(venue)
return cell
case 1:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Review", for: indexPath) as! ReviewCell
cell.bind(reviews[indexPath.item])
return cell
case 2:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "RelatedVenue", for: indexPath) as! RelatedVenueCell
cell.bind(relatedVenues[indexPath.item])
return cell
default:
fatalError()
}
}
݅ذ͕ॏෳ͍ͯ͠Δ
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func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
switch section {
case 0:
return 1
case 1:
return reviews.count
case 2:
return relatedVenues.count
default:
fatalError("unknown section \(section)")
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch indexPath.section {
case 0:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "VenueOutline", for: indexPath) as! VenueOutlineCell
cell.bind(venue)
return cell
case 1:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Review", for: indexPath) as! ReviewCell
cell.bind(reviews[indexPath.item])
return cell
case 2:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "RelatedVenue", for: indexPath) as! RelatedVenueCell
cell.bind(relatedVenues[indexPath.item])
return cell
default:
fatalError()
}
}
ݸͷ7FOVF0VUMJOF$FMMΛฦͨ͢Ίͷॲཧ
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func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
switch section {
case 0:
return 1
case 1:
return reviews.count
case 2:
return relatedVenues.count
default:
fatalError("unknown section \(section)")
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch indexPath.section {
case 0:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "VenueOutline", for: indexPath) as! VenueOutlineCell
cell.bind(venue)
return cell
case 1:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Review", for: indexPath) as! ReviewCell
cell.bind(reviews[indexPath.item])
return cell
case 2:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "RelatedVenue", for: indexPath) as! RelatedVenueCell
cell.bind(relatedVenues[indexPath.item])
return cell
default:
fatalError()
}
}
SFWJFXTDPVOUݸͷ3FWJFX$FMMΛฦͨ͢Ίͷॲཧ
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w ݅ذηϧͷछྨΛܾΊΔॲཧ
w ࣮ߦจ6*$PMMFDUJPO7JFXʹΛ͢ॲཧ
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ॲཧΛஈ֊ʹ͚Δ
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7FOVF%FUBJM7JFX$POUSPMMFS 6*$PMMFDUJPO7JFX
σʔλม
σʔλม
6*$PMMFDUJPO7JFXʹΛ͢ॲཧ
ηϧͷछྨΛܾΊΔॲཧ
w WFOVF
w SFWJFXT
w SFMBUFE7FOVFT
w DFMM%FDMBSBUJPOT
w OVNCFS0G*UFNT
w DFMM'PS*UFN"U
6*$PMMFDUJPO7JFXͷσʔλ
ίϨΫγϣϯΛද͢σʔλ
ঢ়ଶΛද͢σʔλ
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ஈ֊ͷॲཧ
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w ηϧͷछྨͱඥ͚ͮΔͷϖΞ
w 6*$PMMFDUJPO7JFX$FMMͱରͷؔ
enum CellDeclaration: Equatable {
case outline(Venue)
case sectionHeader(String)
case review(Review)
case relatedVenue(Venue)
}
Ռ
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w WFOVF7FOVF
w SFWJFXT<>
w SFMBUFE7FOVFT<>
w DFMM%FDMBSBUJPOT<
$FMM%FDMBSBUJPOPVUMJOF 7FOVF
>
ίϨΫγϣϯΛද͢σʔλ
ঢ়ଶΛද͢σʔλ
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w WFOVF7FOVF
w SFWJFXT<
3FWJFX JE
3FWJFX JE
>
w SFMBUFE7FOVFT<>
w DFMM%FDMBSBUJPOT<
$FMM%FDMBSBUJPOPVUMJOF 7FOVF
$FMM%FDMBSBUJPOTFDUJPO)FBEFS
$FMM%FDMBSBUJPOSFWJFX 3FWJFX JE
$FMM%FDMBSBUJPOSFWJFX 3FWJFX JE
>
ίϨΫγϣϯΛද͢σʔλ
ঢ়ଶΛද͢σʔλ
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struct Data: CellsDeclarator {
var venue: Venue
var reviews: [Review]
var relatedVenues: [Venue]
func declareCells(_ cell: (CellDeclaration) -> Void) {
cell(.outline(venue))
if !reviews.isEmpty {
cell(.sectionHeader("Reviews"))
for review in reviews {
cell(.review(review))
}
}
if !relatedVenues.isEmpty {
cell(.sectionHeader("Related Venues"))
for relatedVenue in relatedVenues {
cell(.relatedVenue(relatedVenue))
}
}
}
}
͜ͷؔΛݺΜͰηϧΛએݴ͍ͯ͘͠
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struct Data: CellsDeclarator {
var venue: Venue
var reviews: [Review]
var relatedVenues: [Venue]
func declareCells(_ cell: (CellDeclaration) -> Void) {
cell(.outline(venue))
if !reviews.isEmpty {
cell(.sectionHeader("Reviews"))
for review in reviews {
cell(.review(review))
}
}
if !relatedVenues.isEmpty {
cell(.sectionHeader("Related Venues"))
for relatedVenue in relatedVenues {
cell(.relatedVenue(relatedVenue))
}
}
}
}
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protocol CellsDeclarator {
associatedtype CellDeclaration
func declareCells(_ cell: (CellDeclaration) -> Void)
}
extension CellsDeclarator {
var cellDeclarations: [CellDeclaration] {
var declarations = [] as [CellDeclaration]
declareCells { declaration in
declarations.append(declaration)
}
return declarations
}
}
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ஈ֊ͷॲཧ
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7FOVF%FUBJM7JFX$POUSPMMFS 6*$PMMFDUJPO7JFX
σʔλม
σʔλม
6*$PMMFDUJPO7JFXʹΛ͢ॲཧ
ڞ௨ͷΈͰߦ͏
ηϧͷछྨΛܾΊΔॲཧ
ը໘͝ͱʹߦ͏
w WFOVF
w SFWJFXT
w SFMBUFE7FOVFT
w DFMM%FDMBSBUJPOT
w OVNCFS0G*UFNT
w DFMM'PS*UFN"U
6*$PMMFDUJPO7JFXͷσʔλ
ίϨΫγϣϯΛද͢σʔλ
ঢ়ଶΛද͢σʔλ
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σʔλม
w OVNCFS0G*UFNT
w DFMM'PS*UFN"U<>
w DFMM%FDMBSBUJPOT<
$FMM%FDMBSBUJPOPVUMJOF 7FOVF
$FMM%FDMBSBUJPOTFDUJPO)FBEFS
$FMM%FDMBSBUJPOSFWJFX *UFN JE
$FMM%FDMBSBUJPOSFWJFX *UFN JE
>
ίϨΫγϣϯΛද͢σʔλ 6*$PMMFDUJPO7JFXͷσʔλ
6*$PMMFDUJPO7JFXʹΛ͢ॲཧ
ڞ௨ͷΈͰߦ͏
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6*$PMMFDUJPO7JFX$FMMΛ
ฦͨ͢Ίʹඞཁͳ͜ͱʁ
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func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch indexPath.section {
case 0:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "VenueOutline", for: indexPath) as! VenueOutlineCell
cell.bind(venue)
return cell
case 1:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Review", for: indexPath) as! ReviewCell
cell.bind(reviews[indexPath.item])
return cell
case 2:
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "RelatedVenue", for: indexPath) as! RelatedVenueCell
cell.bind(relatedVenues[indexPath.item])
return cell
default:
fatalError()
}
}
ηϧͷEFRVFVF
ηϧͷͷඥ͚ͮ
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protocol BindableNibCell {
static var nib: UINib { get }
static var reuseIdentifier: String { get }
associatedtype Value
func bind(_ value: Value)
}
ηϧͷͷඥ͚ͮ
ηϧͷEFRVFVF
ඞཁͳͷΛηϧʹఏڙͤ͞Δ
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struct CellBinder {
let nib: UINib
let reuseIdentifier: String
let configureCell: (UICollectionViewCell) -> Void
fileprivate init(cellType: Cell.Type, value: Cell.Value) {
self.nib = cellType.nib
self.reuseIdentifier = cellType.reuseIdentifier
self.configureCell = { cell in
guard let cell = cell as? Cell else {
fatalError("Could not cast UICollectionView cell to \(Cell.self)")
}
cell.bind(value)
}
}
}
extension BindableNibCell {
static func makeBinder(with value: Value) -> CellBinder {
return CellBinder(cellType: Self.self, value: value)
}
}
ηϧͷͷඥ͚ͮ
ηϧͷEFRVFVF
DFMM'PS*UFN"UͰ͑ΔΑ͏ʹܕΛফڈ
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͜ΕΛͬͯ6*$PMMFDUJPO7JFX%BUB4PVSDFΛ࣮
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class CollectionViewDataSource: NSObject, UICollectionViewDataSource {
var cellDeclarations = [] as [CellDeclaration]
private var registeredReuseIdentifiers = [] as [String]
private let binderFromDeclaration: (CellDeclaration) -> CellBinder
init(binderFromDeclaration: @escaping (CellDeclaration) -> CellBinder) {
self.binderFromDeclaration = binderFromDeclaration
super.init()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return cellDeclarations.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cellBinder = binderFromDeclaration(cellDeclarations[indexPath.item])
if !registeredReuseIdentifiers.contains(cellBinder.reuseIdentifier) {
collectionView.register(cellBinder.nib, forCellWithReuseIdentifier: cellBinder.reuseIdentifier)
registeredReuseIdentifiers.append(cellBinder.reuseIdentifier)
}
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellBinder.reuseIdentifier, for: indexPath)
cellBinder.configureCell(cell)
return cell
}
}
$FMM%FDMBSBUJPOͱ$FMM#JOEFSͷϚοϐϯάΛҾʹऔΔ
$FMM%FDMBSBUJPOΛ$FMM#JOEFSΛมͯ͠6*$PMMFDUJPO7JFX$FMMΛฦ͢
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͜ΕΛ7FOVF%FUBJM7JFX$POUSPMMFSͰ
ΠϯελϯεԽͯ͠͏
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final class VenueDetailViewController: UIViewController {
private let dataSource = CollectionViewDataSource { cellDeclaration in
switch cellDeclaration {
case .outline(let venue):
return VenueOutlineCell.makeBinder(with: venue)
case .sectionHeader(let title):
return SectionHeaderCell.makeBinder(with: title)
case .review(let review):
return ReviewCell.makeBinder(with: review)
case .relatedVenue(let venue):
return RelatedVenueCell.makeBinder(with: venue)
}
}
...
}
$FMM%FDMBSBUJPOͱ$FMM#JOEFSΛରԠ͚ͮ
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7FOVF%FUBJM7JFX$POUSPMMFS 6*$PMMFDUJPO7JFX
σʔλม
σʔλม
6*$PMMFDUJPO7JFXʹΛ͢ॲཧ
ڞ௨ͷΈͰߦ͏
ηϧͷछྨΛܾΊΔॲཧ
ը໘͝ͱʹߦ͏
w WFOVF
w SFWJFXT
w SFMBUFE7FOVFT
w DFMM%FDMBSBUJPOT
w OVNCFS0G*UFNT
w DFMM'PS*UFN"U
6*$PMMFDUJPO7JFXͷσʔλ
ίϨΫγϣϯΛද͢σʔλ
ঢ়ଶΛද͢σʔλ
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No content
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;Γ͔͑Γ
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final class VenueDetailViewController: UIViewController {
enum CellDeclaration: Equatable {
case outline(Venue)
case sectionHeader(String)
case review(Review)
case relatedVenue(Venue)
}
struct Data: CellsDeclarator {
var venue: Venue
var reviews: [Review]
var relatedVenues: [Venue]
func declareCells(_ cell: (CellDeclaration) -> Void) {
cell(.outline(venue))
if !reviews.isEmpty {
cell(.sectionHeader("Reviews"))
for review in reviews {
cell(.review(review))
}
}
if !relatedVenues.isEmpty {
cell(.sectionHeader("Related Venues"))
for relatedVenue in relatedVenues {
cell(.relatedVenue(relatedVenue))
}
}
}
}
...
}
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final class VenueDetailViewController: UIViewController {
enum CellDeclaration: Equatable {
case outline(Venue)
case sectionHeader(String)
case review(Review)
case relatedVenue(Venue)
}
struct Data: CellsDeclarator {
var venue: Venue
var reviews: [Review]
var relatedVenues: [Venue]
func declareCells(_ cell: (CellDeclaration) -> Void) {
cell(.outline(venue))
if !reviews.isEmpty {
cell(.sectionHeader("Reviews"))
for review in reviews {
cell(.review(review))
}
}
if !relatedVenues.isEmpty {
cell(.sectionHeader("Related Venues"))
for relatedVenue in relatedVenues {
cell(.relatedVenue(relatedVenue))
}
}
}
}
...
}
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final class VenueDetailViewController: UIViewController {
...
@IBOutlet private weak var collectionView: UICollectionView!
private let dataSource = CollectionViewDataSource { cellDeclaration in
switch cellDeclaration {
case .outline(let venue):
return VenueOutlineCell.makeBinder(with: venue)
case .sectionHeader(let title):
return SectionHeaderCell.makeBinder(with: title)
case .review(let review):
return ReviewCell.makeBinder(with: review)
case .relatedVenue(let venue):
return RelatedVenueCell.makeBinder(with: venue)
}
}
private var data: Data! {
didSet {
dataSource.cellDeclarations = data.cellDeclarations
collectionView.reloadData()
}
}
}
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w ηϧͷએݴදࣔ݁Ռͱಉ͡ߏͳͷͰಡΈ͍͢
w ॳݟͰͲ͏ͬͯಈ͘ͷ͔ཧղ͢Δͷʹֻ͕͔࣌ؒΔ
w ظతʹಡΈ͢͞ͷϝϦοτ͕উͪͦ͏
Մಡੑ
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Slide 53 text
࣮ίετ
w ηϧͷએݴදࣔ݁Ռͱಉ͡ߏͳͷͰॻ͖͍͢
w ίʔυͷ૯ྔݮͬͨ
w ॏෳͨ݅͠ذΛഉআͰ͖ͨͷͰϛεͮ͠Β͘ͳͬͨ
w ఆ͍ͯ͠ͳ͍͍ํͰίετ্͕͕ΔՄೳੑ͕͋Δ
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Slide 54 text
w ηϧͷએݴͷςετ͕Մೳʹͳͬͨ
w ैདྷҰؾʹஈ֊ͷॲཧΛ͍ͯͨ͠ͷͰ͔ͬͨ͠
ςελϏϦςΟ
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final class VenueDetailViewController: UIViewController {
enum CellDeclaration: Equatable {
case outline(Venue)
case sectionHeader(String)
case review(Review)
case relatedVenue(Venue)
}
struct Data: CellsDeclarator {
var venue: Venue
var reviews: [Review]
var relatedVenues: [Venue]
func declareCells(_ cell: (CellDeclaration) -> Void) {
cell(.outline(venue))
if !reviews.isEmpty {
cell(.sectionHeader("Reviews"))
for review in reviews {
cell(.review(review))
}
}
if !relatedVenues.isEmpty {
cell(.sectionHeader("Related Venues"))
for relatedVenue in relatedVenues {
cell(.relatedVenue(relatedVenue))
}
}
}
}
...
}
͜͜ͷ݁Ռͷ<$FMM%FDMBSBUJPO>ςετՄೳ
extension CellsDeclarator {
var cellDeclarations: [CellDeclaration] {
var declarations = [] as [CellDeclaration]
declareCells { declaration in
declarations.append(declaration)
}
return declarations
}
}
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func testEmptyRelatedVenues() {
let venue = Venue(photo: nil, name: "Kaminarimon")
let review1 = Review(authorImage: nil, authorName: "Yosuke Ishikawa", body: "Foo")
let review2 = Review(authorImage: nil, authorName: "Masatake Yamoto", body: "Bar")
let data = VenueDetailViewController.Data(
venue: venue,
reviews: [
review1,
review2,
],
relatedVenues: [])
XCTAssertEqual(data.cellDeclarations, [
.outline(venue),
.sectionHeader("Reviews"),
.review(review1),
.review(review2),
])
}
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·ͱΊ