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!LOUL%BZ
ʙ5SBDL$
4XJGU6*Ͱͷඇಉظॲཧσʔλͷ
ঢ়ଶཧΛߟ͑Δ
J04%$JPTEDD
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ʮඇಉظॲཧσʔλͷঢ়ଶཧʯͱ
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ʮඇಉظॲཧσʔλͷঢ়ଶཧʯͱ
ޭ ࣦഊ
ϩʔυத
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ʮඇಉظॲཧσʔλͷঢ়ଶཧʯͱ
w ඇಉظʹσʔλΛදࣔ͢Δࡍͷը໘ͷঢ়ଶཧ
w ঢ়ଶ
w ϩʔυத
w ޭ
w ࣦഊ
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ʮඇಉظॲཧσʔλͷঢ়ଶཧʯͱ
ޭϩʔυத
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ʮඇಉظॲཧσʔλͷঢ়ଶཧʯͱ
ޭϩʔυத ޭࣦഊ
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͢͜ͱ
w ඇಉظॲཧσʔλͷঢ়ଶཧํ๏Λ༷ʑͳ༷Λݩʹ࣮ɾߟ
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͢͜ͱ
w ඇಉظॲཧσʔλͷঢ়ଶཧํ๏Λ༷ʑͳ༷Λݩʹ࣮ɾߟ
w ख๏
w FOVNΛ༻͍ͨख๏
w ίϯϙʔωϯτΛ༻͍ͨख๏
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͢͜ͱ
w ඇಉظॲཧσʔλͷঢ়ଶཧํ๏Λ༷ʑͳ༷Λݩʹ࣮ɾߟ
w ख๏
w FOVNΛ༻͍ͨख๏
w ίϯϙʔωϯτΛ༻͍ͨख๏
w ओޠ͕େ͖͍ςʔϚͳͷͰɺߟ͑ํͷҰͭͱͯ͠ଊ͑ͭͭ
վળ৽ͨͳࢹ͕͋Ε࣭ɾίϝϯτ͚ͨΒخ͍͠Ͱ͢👍
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$BTF
FOVNͷಋೖ
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$BTFFOVNͷಋೖ
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$BTFFOVNͷಋೖ
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$BTFFOVNͷಋೖ
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$BTFFOVNͷಋೖ
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#FGPSF
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$BTFFOVNͷಋೖ#FGPSF
ঢ়ଶͷએݴ
@State private var data: User?
@State private var error: (any Error)?
@State private var isLoading = false
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$BTFFOVNͷಋೖ#FGPSF
7JFXͷग़͠Θ͚
var body: some View {
List {
if isLoading {
EmptyView()
} else {
if let data {
content(user: data)
} else if error != nil {
ErrorStateView()
}
}
}
.overlay {
if isLoading {
ProgressView()
}
}
}
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$BTFFOVNͷಋೖ#FGPSF
var body: some View {
List {
if isLoading {
EmptyView()
} else {
if let data {
content(user: data)
} else if error != nil {
ErrorStateView()
}
}
}
.overlay {
if isLoading {
ProgressView()
}
}
}
ϩʔυத
7JFXͷग़͠Θ͚
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$BTFFOVNͷಋೖ#FGPSF
var body: some View {
List {
if isLoading {
EmptyView()
} else {
if let data {
content(user: data)
} else if error != nil {
ErrorStateView()
}
}
}
.overlay {
if isLoading {
ProgressView()
}
}
}
ϩʔυத
ޭ
7JFXͷग़͠Θ͚
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$BTFFOVNͷಋೖ#FGPSF
var body: some View {
List {
if isLoading {
EmptyView()
} else {
if let data {
content(user: data)
} else if error != nil {
ErrorStateView()
}
}
}
.overlay {
if isLoading {
ProgressView()
}
}
}
ϩʔυத
ޭ
ࣦഊ
7JFXͷग़͠Θ͚
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$BTFFOVNͷಋೖ#FGPSF
ঢ়ଶͷૢ࡞ʢඇಉظॲཧʣ
func fetchUser() async {
if isLoading { return }
isLoading = true
data = nil
error = nil
do {
data = try await API.getUser()
} catch {
self.error = error
}
isLoading = false
}
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$BTFFOVNͷಋೖ#FGPSF
ঢ়ଶͷૢ࡞ʢඇಉظॲཧʣ
func fetchUser() async {
if isLoading { return }
isLoading = true
data = nil
error = nil
do {
data = try await API.getUser()
} catch {
self.error = error
}
isLoading = false
}
ϩʔυ։࢝
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$BTFFOVNͷಋೖ#FGPSF
ঢ়ଶͷૢ࡞ʢඇಉظॲཧʣ
func fetchUser() async {
if isLoading { return }
isLoading = true
data = nil
error = nil
do {
data = try await API.getUser()
} catch {
self.error = error
}
isLoading = false
}
"1*Λୟ͘
ϩʔυ։࢝
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$BTFFOVNͷಋೖ#FGPSF
ঢ়ଶͷૢ࡞ʢඇಉظॲཧʣ
func fetchUser() async {
if isLoading { return }
isLoading = true
data = nil
error = nil
do {
data = try await API.getUser()
} catch {
self.error = error
}
isLoading = false
}
"1*Λୟ͘
ࣦഊͳΒFSSPS
ϩʔυ։࢝
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$BTFFOVNͷಋೖ#FGPSF
ঢ়ଶͷૢ࡞ʢඇಉظॲཧʣ
func fetchUser() async {
if isLoading { return }
isLoading = true
data = nil
error = nil
do {
data = try await API.getUser()
} catch {
self.error = error
}
isLoading = false
}
"1*Λୟ͘
ࣦഊͳΒFSSPS
ϩʔυऴྃ
ϩʔυ։࢝
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$BTFFOVNͷಋೖ#FGPSF
·ͱΊ
w ঢ়ଶͷએݴม
w 7JFXͷग़͠Θ͚มΛར༻͠ذ
w ঢ়ଶૢ࡞มΛผʑʹૢ࡞
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$BTFFOVNͷಋೖ#FGPSF
JGͷωετ
var body: some View {
List {
if isLoading {
EmptyView()
} else {
if let data {
content(user: data)
} else if error != nil {
ErrorStateView()
}
}
}
.overlay {
if isLoading {
ProgressView()
}
}
}
ωετ͕ਂ͍
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$BTFFOVNͷಋೖ#FGPSF
มΛผʑʹૢ࡞͢Δͷ͕ࡶ
func fetchUser() async {
if isLoading { return }
isLoading = true
data = nil
error = nil
do {
data = try await API.getUser()
} catch {
self.error = error
}
isLoading = false
}
લճͷঢ়ଶΛআ
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$BTFFOVNͷಋೖ#FGPSF
มΛผʑʹૢ࡞͢Δͷ͕ࡶ
func fetchUser() async {
if isLoading { return }
isLoading = true
data = nil
error = nil
do {
data = try await API.getUser()
} catch {
self.error = error
}
isLoading = false
}
݁Ռͷೖͱ
ϩʔυऴ͕ྃಠཱ
લճͷঢ়ଶΛআ
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$BTFFOVNͷಋೖ#FGPSF
w ঢ়ଶͷએݴม
w 7JFXͷग़͠Θ͚มΛར༻͠ذ
w ωετ͕ਂ͍
w ঢ়ଶૢ࡞มΛผʑʹૢ࡞
w ผʑͷૢ࡞͕ࡶ
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"GUFS
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$BTFFOVNͷಋೖ"GUFS
ঢ়ଶͷએݴ
enum DataState {
case idle
case loading
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
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$BTFFOVNͷಋೖ"GUFS
ঢ়ଶͷએݴ
enum DataState {
case idle
case loading
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
ม͕ͭ
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$BTFFOVNͷಋೖ"GUFS
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .loading:
EmptyView()
case .success(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isLoading {
ProgressView()
}
}
}
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$BTFFOVNͷಋೖ"GUFS
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .loading:
EmptyView()
case .success(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isLoading {
ProgressView()
}
}
}
ωετ͕ͭ
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$BTFFOVNͷಋೖ"GUFS
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .loading:
EmptyView()
case .success(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isLoading {
ProgressView()
}
}
}
extension DataState {
var isLoading: Bool {
if case .loading = self {
return true
}
return false
}
}
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$BTFFOVNͷಋೖ"GUFS
ঢ়ଶͷૢ࡞ʢඇಉظॲཧʣ
func fetchUser() async {
if dataState.isLoading { return }
dataState = .loading
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
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$BTFFOVNͷಋೖ"GUFS
ঢ়ଶͷૢ࡞ʢඇಉظॲཧʣ
func fetchUser() async {
if dataState.isLoading { return }
dataState = .loading
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
લճͷঢ়ଶআ
JT-PBEJOHGBMTF
ෆཁ
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$BTFFOVNͷಋೖ"GUFS
FOVNΛ༻͍ͨঢ়ଶཧ
w ঢ়ଶͷએݴม
w 7JFXͷग़͠Θ͚มͷTXJUDI
w ঢ়ଶૢ࡞มͷૢ࡞
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$BTFFOVNͷಋೖ"GUFS
FOVNΛ༻͍ͨঢ়ଶཧ
w ঢ়ଶͷએݴม
w 7JFXͷग़͠Θ͚มͷTXJUDI
w ঢ়ଶૢ࡞มͷૢ࡞
w FOVNʹΑͬͯը໘ͷঢ়ଶ͕໌֬ʹͳΓՄಡੑ্
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$BTF
࠶ಡΈࠐΈதσʔλΛදࣔ
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ
ཧͷڍಈ
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ
ཧͷڍಈ
ϩʔυͱσʔλ͕
ಉ࣌ʹදࣔ
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#FGPSF
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ#FGPSF
$BTFͷFOVNͰ࣮
enum DataState {
case idle
case loading
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
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var body: some View {
List {
switch dataState {
case .idle, .loading:
EmptyView()
case .success(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isLoading {
ProgressView()
}
}
}
$BTF࠶ಡΈࠐΈதσʔλΛදࣔ#FGPSF
$BTFͷFOVNͰ࣮
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var body: some View {
List {
switch dataState {
case .idle, .loading:
EmptyView()
case .success(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isLoading {
ProgressView()
}
}
}
$BTF࠶ಡΈࠐΈதσʔλΛදࣔ#FGPSF
$BTFͷFOVNͰ࣮
ɾϩʔυதͩͱσʔλ͕ফ͑Δ
ɾϓϧϦϑͱೋॏʹϩʔυ͕දࣔ
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var body: some View {
List {
switch dataState {
case .idle, .loading:
EmptyView()
case .success(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isLoading {
ProgressView()
}
}
}
$BTF࠶ಡΈࠐΈதσʔλΛදࣔ#FGPSF
$BTFͷFOVNͰ࣮
MPBEJOHʹ
σʔλ͕ͳ͍
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"GUFS
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
SF-PBEJOH 7
ΛՃ
enum DataState {
case idle
case loading
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
SF-PBEJOH 7
ΛՃ
enum DataState {
case idle
case loading
case reLoading(V)
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
SF-PBEJOH 7
ΛՃ
enum DataState {
case idle
case initialLoading
case reLoading(V)
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .loading:
EmptyView()
case .success(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
࠶ಡΈࠐΈத
σʔλΛදࣔ
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func fetchUser() async {
if dataState.isLoading { return }
dataState = .loading
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
ঢ়ଶૢ࡞
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
ঢ়ଶૢ࡞
func fetchUser() async {
switch dataState {
case .idle, .failure:
dataState = .initialLoading
case .success(let value):
dataState = .reLoading(value)
case .initialLoading,
.reLoading:
return
}
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
ঢ়ଶૢ࡞
func fetchUser() async {
switch dataState {
case .idle, .failure:
dataState = .initialLoading
case .success(let value):
dataState = .reLoading(value)
case .initialLoading,
.reLoading:
return
}
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
TVDDFTT͔Βϩʔυ͢Δ࣌
SF-PBEJOH
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
ঢ়ଶૢ࡞
func fetchUser() async {
if dataState.isLoading { return }
dataState.startLoading()
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
extension DataState {
mutating func startLoading() {
switch self {
case .idle, .failure:
self = .initialLoading
case .success(let value):
self = .reLoading(value)
default:
return
}
}
}
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
ঢ়ଶૢ࡞
func fetchUser() async {
if dataState.isLoading { return }
dataState.startLoading()
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
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$BTF࠶ಡΈࠐΈதσʔλΛදࣔ"GUFS
࣮ྃ
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
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$BTF
࠶ಡΈࠐΈதͰΤϥʔΛදࣔ
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ
ཧͷڍಈ
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ
ཧͷڍಈ
ϩʔυͱΤϥʔ͕
ಉ࣌ʹදࣔ
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#FGPSF
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ#FGPSF
$BTFͷFOVNͰ࣮
enum DataState {
case idle
case initialLoading
case reLoading(V)
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ#FGPSF
$BTFͷFOVNͰ࣮
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ#FGPSF
$BTFͷFOVNͰ࣮
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
ɾϩʔυதͩͱΤϥʔ͕ফ͑Δ
ɾϓϧϦϑͱೋॏʹϩʔυ͕දࣔ
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ#FGPSF
$BTFͷFOVNͰ࣮
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
JOJUJBM-PBEJOHʹΤϥʔ͕ͳ͍
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"GUFS
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ"GUFS
SFUSZ-PBEJOH &
ΛՃ
enum DataState {
case idle
case initialLoading
case reLoading(V)
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ"GUFS
SFUSZ-PBEJOH &
ΛՃ
enum DataState {
case idle
case initialLoading
case reLoading(V)
case retryLoading(E)
case success(V)
case failure(E)
}
@State private var dataState: DataState = .idle
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var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
content(user: value)
case .failure:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ"GUFS
7JFXͷग़͠Θ͚
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ"GUFS
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
content(user: value)
case .failure,
.retryLoading:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
࠶ಡΈࠐΈத
ΤϥʔΛදࣔ
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ"GUFS
ঢ়ଶૢ࡞
func fetchUser() async {
if dataState.isLoading { return }
dataState.startLoading()
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ"GUFS
ঢ়ଶૢ࡞
func fetchUser() async {
if dataState.isLoading { return }
dataState.startLoading()
do {
dataState = .success(try await API.getUser())
} catch {
dataState = .failure(error)
}
}
extension DataState {
mutating func startLoading() {
switch self {
case .idle:
self = .initialLoading
case .success(let value):
self = .reLoading(value)
case .failure(let error):
self = .retryLoading(error)
default:
return
}
}
}
GBJMVSF͔Βϩʔυ͢Δ࣌
SFUSZ-PBEJOH
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$BTF࠶ಡΈࠐΈதͰΤϥʔΛදࣔ"GUFS
࣮ྃ
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
content(user: value)
case .failure,
.retryLoading:
ErrorStateView()
}
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
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ঢ়ଶ͕૿͑ͯෳࡶʹͳͬͨʁ
enum DataState {
case idle
case initialLoading
case reLoading(V)
case retryLoading(E)
case success(V)
case failure(E)
}
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ঢ়ଶΛਤղͯ͠ΈΔ
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ঢ়ଶΛਤղͯ͠ΈΔ
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ঢ়ଶΛਤղͯ͠ΈΔ
$BTFMPBEJOH
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ঢ়ଶΛਤղͯ͠ΈΔ
$BTFSF-PBEJOH
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ঢ়ଶΛਤղͯ͠ΈΔ
$BTFSFUSZ-PBEJOH
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ঢ়ଶΛਤղͯ͠ΈΔ
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࣮MPBEJOHͷྨΛม͚͑ͨͩ
w MPBEJOHΛηϚϯςΟοΫʹྨ
w ʮͲͷঢ়ଶ͔Βϩʔυ͔ͨ͠ʯͰࡉԽ
w දݱྗͷ্
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࣮MPBEJOHͷྨΛม͚͑ͨͩ
w MPBEJOHΛηϚϯςΟοΫʹྨ
w ʮͲͷঢ়ଶ͔Βϩʔυ͔ͨ͠ʯͰࡉԽ
w දݱྗͷ্
w $BTF
ͷFOVNʮ؆ུԽ͞Εͨܗʯͱݴ͑Δ
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࠷దͳཻબΛ
w MPBEJOHͷྨ͕ࡉ͔͍ํ͕ରԠͰ͖Δέʔε͕ଟ͍
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࠷దͳཻબΛ
w MPBEJOHͷྨ͕ࡉ͔͍ํ͕ରԠͰ͖Δέʔε͕ଟ͍
w ͕ɺྨ͕ࡉ͔͍͕ৗʹྑ͍Θ͚Ͱͳ͍
w ར༻͠ͳ͍ঢ়ଶΛ͍࣋ͬͯͯํ͕ͳ͍
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࠷దͳཻબΛ
w MPBEJOHͷྨ͕ࡉ͔͍ํ͕ରԠͰ͖Δέʔε͕ଟ͍
w ͕ɺྨ͕ࡉ͔͍͕ৗʹྑ͍Θ͚Ͱͳ͍
w ར༻͠ͳ͍ঢ়ଶΛ͍࣋ͬͯͯํ͕ͳ͍
w ࠷దͳMPBEJOHͷྨͷཻΛબ͢͠
w ༷ɾকདྷͷ֦ுੑɾՄಡੑɾϩδοΫཧίετFUDʜ
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$BTF
ϖʔδϯά
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$BTFϖʔδϯά
ཧͷڍಈ
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$BTFϖʔδϯά
ཧͷڍಈ
ϖʔδϯάத
ϖʔδϯάࣦഊͰ
લϖʔδͷσʔλ͕දࣔ
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"GUFS
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$BTFϖʔδϯά
QBHJOH 7
QBHJOH'BJMVSF 7
&
ΛՃ
enum DataState {
case idle
case initialLoading
case reLoading(V)
case retryLoading(E)
case success(V)
case failure(E)
}
@State private var dataState: DataState<[Post], any Error> = .idle
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$BTFϖʔδϯά
QBHJOH 7
QBHJOH'BJMVSF 7
&
ΛՃ
enum DataState {
case idle
case initialLoading
case reLoading(V)
case retryLoading(E)
case success(V)
case failure(E)
case paging(V)
case pagingFailure(V, E)
}
@State private var dataState: DataState<[Post], any Error> = .idle
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$BTFϖʔδϯά
QBHJOH 7
QBHJOH'BJMVSF 7
&
ΛՃ
enum PagingDataState {
case idle
case initialLoading
case reLoading(V)
case retryLoading(E)
case success(V)
case loadingFailure(E)
case paging(V)
case pagingFailure(V, E)
}
@State private var dataState: PagingDataState<[Post], any Error> = .idle
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$BTFϖʔδϯά
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
listContent(posts: value)
case .failure,
.retryLoading:
ErrorStateView()
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
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$BTFϖʔδϯά
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
listContent(posts: value)
case .failure,
.retryLoading:
ErrorStateView()
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
func listContent(posts: [Post]) -> some View {
ForEach(posts) { post in
Text(post.title)
}
}
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$BTFϖʔδϯά
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value):
listContent(posts: value)
case .failure,
.retryLoading:
ErrorStateView()
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
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$BTFϖʔδϯά
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value),
.paging(let value),
.pagingFailure(let value, _):
listContent(posts: value)
case .loadingFailure,
.retryLoading:
ErrorStateView()
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
ϖʔδϯάதɾϖʔδϯάࣦഊ
ͰલϖʔδͷσʔλΛදࣔ
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$BTFϖʔδϯά
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value),
.paging(let value),
.pagingFailure(let value, _):
listContent(posts: value)
case .loadingFailure,
.retryLoading:
ErrorStateView()
}
.overlay {
if dataState.isInitialLoading {
ProgressView()
}
}
}
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$BTFϖʔδϯά
7JFXͷग़͠Θ͚
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value),
.paging(let value),
.pagingFailure(let value, _):
listContent(posts: value)
if dataState.isPagingFailure {
ErrorStateView(…)
} else {
ProgressView()
.onAppear {
Task {
await fetchMore()
}
}
}
case .loadingFailure,
.retryLoading:
ErrorStateView()
-JTUԼ෦ʹ
Τϥʔදࣔ
ϖʔδϯάݕ
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$BTFϖʔδϯά
ঢ়ଶૢ࡞ʢॳճऔಘɾϦϑϨογϡʣ
func fetchInitial() async {
if dataState.isLoading || dataState.isPaging { return }
dataState.startLoading()
do {
dataState = .success(try await API.getPosts(minId: 0, count: 30))
} catch {
dataState = .loadingFailure(error)
}
}
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$BTFϖʔδϯά
ঢ়ଶૢ࡞ʢॳճऔಘɾϦϑϨογϡʣ
func fetchInitial() async {
if dataState.isLoading || dataState.isPaging { return }
dataState.startLoading()
do {
dataState = .success(try await API.getPosts(minId: 0, count: 30))
} catch {
dataState = .loadingFailure(error)
}
}
extension PagingDataState {
mutating func startLoading() {
switch self {
case .idle:
self = .initialLoading
case .success(let value),
.pagingFailure(let value, _):
self = .reLoading(value)
case .loadingFailure(let error):
self = .retryLoading(error)
default:
return
}
}
}
QBHJOH'BJMVSF͔Βϩʔυ͢Δ࣌
SF-PBEJOHʹ
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$BTFϖʔδϯά
ঢ়ଶૢ࡞ʢϖʔδϯάʣ
func fetchMore() async {
if dataState.isLoading || dataState.isPaging { return }
guard let users = dataState.value,
let lastId = users.last?.id else { return }
dataState.startPaging()
do {
let newUsers = try await API.getPosts(minId: lastId + 1, count: 30)
dataState = .success(users + newUsers)
} catch {
dataState = .pagingFailure(users, error)
}
}
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$BTFϖʔδϯά
ঢ়ଶૢ࡞ʢϖʔδϯάʣ
func fetchMore() async {
if dataState.isLoading || dataState.isPaging { return }
guard let users = dataState.value,
let lastId = users.last?.id else { return }
dataState.startPaging()
do {
let newUsers = try await API.getPosts(minId: lastId + 1, count: 30)
dataState = .success(users + newUsers)
} catch {
dataState = .pagingFailure(users, error)
}
}
extension PagingDataState {
mutating func startPaging() {
switch self {
case .success(let value),
.pagingFailure(let value, _):
self = .paging(value)
default:
return
}
}
}
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$BTFϖʔδϯά
ঢ়ଶૢ࡞ʢϖʔδϯάʣ
func fetchMore() async {
if dataState.isLoading || dataState.isPaging { return }
guard let users = dataState.value,
let lastId = users.last?.id else { return }
dataState.startPaging()
do {
let newUsers = try await API.getPosts(minId: lastId + 1, count: 30)
dataState = .success(users + newUsers)
} catch {
dataState = .pagingFailure(users, error)
}
}
MPBEJOH'BJMVSFͰͳ͘
QBHJOH'BJMVSF
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$BTFϖʔδϯά
࣮ྃ
var body: some View {
List {
switch dataState {
case .idle, .initialLoading:
EmptyView()
case .success(let value),
.reLoading(let value),
.paging(let value),
.pagingFailure(let value, _):
listContent(posts: value)
if dataState.isPagingFailure {
ErrorStateView(…)
} else {
ProgressView()
.onAppear {
Task {
await fetchMore()
}
}
}
case .loadingFailure,
.retryLoading:
ErrorStateView()
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$BTFϖʔδϯά
ঢ়ଶΛਤղ
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$BTFϖʔδϯά
ঢ়ଶΛਤղ
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$BTFϖʔδϯά
ঢ়ଶΛਤղ
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FOVNʹΑΔঢ়ଶཧ
ϙΠϯτ
w 👍ը໘ͷঢ়ଶɾඇಉظॲཧσʔλΛͭͷมͰཧͰ͖Δ
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FOVNʹΑΔঢ়ଶཧ
ϙΠϯτ
w 👍ը໘ͷঢ়ଶɾඇಉظॲཧσʔλΛͭͷมͰཧͰ͖Δ
w 👍ΧελϚΠζੑ͕ߴ͍
w ҙͷڍಈɾϩʔυதɾޭɾࣦഊ7JFXΛग़ͤΔ
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FOVNʹΑΔঢ়ଶཧ
ϙΠϯτ
w 👍ը໘ͷঢ়ଶɾඇಉظॲཧσʔλΛͭͷมͰཧͰ͖Δ
w 👍ΧελϚΠζੑ͕ߴ͍
w ҙͷڍಈɾϩʔυதɾޭɾࣦഊ7JFXΛग़ͤΔ
w 👎ϘΠϥʔϓϨʔτ͕ଟൃ
w ࣮ࡍͷ։ൃͰଟ͘ͷը໘Ͱ౷Ұ͞Ε͍ͯΔέʔε͕ଟ͍
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var body: some View {
PagingList(
success: listContent,
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
}
ίϯϙʔωϯτʹΑΔঢ়ଶཧ
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var body: some View {
PagingList(
success: listContent,
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
}
ίϯϙʔωϯτʹΑΔঢ়ଶཧ
ඇಉظॲཧΛ͢
ϨΠΞτΛ͢
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ίϯϙʔωϯτʹΑΔঢ়ଶཧ
ϙΠϯτ
w 👍ϘΠϥʔϓϨʔτͷճආ
w ίʔυྔͷݮ
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ίϯϙʔωϯτʹΑΔঢ়ଶཧ
ϙΠϯτ
w 👍ϘΠϥʔϓϨʔτͷճආ
w ίʔυྔͷݮ
w 👎ΧελϚΠζੑ͕͍
w ڞ௨ίϯϙʔωϯτͰରԠͰ͖ͳ͍߹ଘࡏ
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FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
w FOVNΛҾʹͱΔίϯϙʔωϯτ
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FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
4XJUDI7JFX4UZMF
w ֤ը໘ͰTXJUDIͷϘΠϥʔϓϨʔτΛॻ͘ඞཁੑ
w ࣮ࡍͷ։ൃͰʢଟ͘ͷը໘Ͱʣ༷͕౷Ұ͞Ε͍ͯΔέʔε͕ଟ͍
w ঢ়ଶૢ࡞ͷϛε͕ͳ͍Θ͚Ͱͳ͍
@State private var dataState: PagingDataState<[Post], any Error> = .idle
var body: some View {
PagingList(dataState: dataState, listContent: listContent) {
Task {
await fetchMore()
}
}
.refreshable {
await fetchInitial()
}
.task {
await fetchInitial()
}
.onChange(of: dataState.isFailure) { bool in
guard bool, let error = dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
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FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
4XJUDI7JFX4UZMF
w ֤ը໘ͰTXJUDIͷϘΠϥʔϓϨʔτΛॻ͘ඞཁੑ
w ࣮ࡍͷ։ൃͰʢଟ͘ͷը໘Ͱʣ༷͕౷Ұ͞Ε͍ͯΔέʔε͕ଟ͍
w ঢ়ଶૢ࡞ͷϛε͕ͳ͍Θ͚Ͱͳ͍
@State private var dataState: PagingDataState<[Post], any Error> = .idle
var body: some View {
PagingList(dataState: dataState, listContent: listContent) {
Task {
await fetchMore()
}
}
.refreshable {
await fetchInitial()
}
.task {
await fetchInitial()
}
.onChange(of: dataState.isFailure) { bool in
guard bool, let error = dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
ϖʔδϯά
ϓϧϦϑ
ॳճऔಘ
ΤϥʔΛόφʔͰදࣔ
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'FUDI7JFX4UZMF
w ֤ը໘ͰTXJUDIͷϘΠϥʔϓϨʔτΛॻ͘ඞཁੑ
w ࣮ࡍͷ։ൃͰʢଟ͘ͷը໘Ͱʣ༷͕౷Ұ͞Ε͍ͯΔέʔε͕ଟ͍
w ঢ়ଶૢ࡞ͷϛε͕ͳ͍Θ͚Ͱͳ͍
@StateObject private var viewStore: LoadingContentViewStore = .init(
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
var body: some View {
PagingList(viewStore: viewStore, success: listContent)
.task {
await viewStore.loadInitial()
}
.onChange(of: viewStore.dataState.isFailure) { bool in
guard bool, let error = viewStore.dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
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'FUDI7JFX4UZMF
w ֤ը໘ͰTXJUDIͷϘΠϥʔϓϨʔτΛॻ͘ඞཁੑ
w ࣮ࡍͷ։ൃͰʢଟ͘ͷը໘Ͱʣ༷͕౷Ұ͞Ε͍ͯΔέʔε͕ଟ͍
w ঢ়ଶૢ࡞ͷϛε͕ͳ͍Θ͚Ͱͳ͍
@StateObject private var viewStore: LoadingContentViewStore = .init(
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
var body: some View {
PagingList(viewStore: viewStore, success: listContent)
.task {
await viewStore.loadInitial()
}
.onChange(of: viewStore.dataState.isFailure) { bool in
guard bool, let error = viewStore.dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
ঢ়ଶཧΛ͢Δ4UBUF0CKFDUΛ͢
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'FUDI7JFX4UZMF
w ֤ը໘ͰTXJUDIͷϘΠϥʔϓϨʔτΛॻ͘ඞཁੑ
w ࣮ࡍͷ։ൃͰʢଟ͘ͷը໘Ͱʣ༷͕౷Ұ͞Ε͍ͯΔέʔε͕ଟ͍
w ঢ়ଶૢ࡞ͷϛε͕ͳ͍Θ͚Ͱͳ͍
@StateObject private var viewStore: LoadingContentViewStore = .init(
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
var body: some View {
PagingList(viewStore: viewStore, success: listContent)
.task {
await viewStore.loadInitial()
}
.onChange(of: viewStore.dataState.isFailure) { bool in
guard bool, let error = viewStore.dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
ར༻ऀଆ͔ΒൃՐՄೳ
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'FUDI7JFX4UZMF
w ֤ը໘ͰTXJUDIͷϘΠϥʔϓϨʔτΛॻ͘ඞཁੑ
w ࣮ࡍͷ։ൃͰʢଟ͘ͷը໘Ͱʣ༷͕౷Ұ͞Ε͍ͯΔέʔε͕ଟ͍
w ঢ়ଶૢ࡞ͷϛε͕ͳ͍Θ͚Ͱͳ͍
@StateObject private var viewStore: LoadingContentViewStore = .init(
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
var body: some View {
PagingList(viewStore: viewStore, success: listContent)
.task {
await viewStore.loadInitial()
}
.onChange(of: viewStore.dataState.isFailure) { bool in
guard bool, let error = viewStore.dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
ॳճऔಘΤϥʔදࣔը໘͝ͱ
ར༻ऀଆ͔ΒൃՐՄೳ
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#JOEBCMF'FUDI7JFX4UZMF
@State private var dataState: PagingDataState<[Post], any Error> = .idle
var body: some View {
PagingList(
dataState: $dataState,
success: listContent,
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
.onChange(of: dataState.isFailure) { isFailure in
guard isFailure, let error = dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
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#JOEBCMF'FUDI7JFX4UZMF
@State private var dataState: PagingDataState<[Post], any Error> = .idle
var body: some View {
PagingList(
dataState: $dataState,
success: listContent,
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
.onChange(of: dataState.isFailure) { isFailure in
guard isFailure, let error = dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
#JOEJOHͰঢ়ଶ͚ͩ͢
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#JOEBCMF'FUDI7JFX4UZMF
@State private var dataState: PagingDataState<[Post], any Error> = .idle
var body: some View {
PagingList(
dataState: $dataState,
success: listContent,
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
.onChange(of: dataState.isFailure) { isFailure in
guard isFailure, let error = dataState.error else { return }
MessageBanner.showError("Τϥʔ͕ൃੜ͠·ͨ͠", with: error.localizedDescription)
}
}
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
Τϥʔදࣔը໘͝ͱ
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4JNQMF'FUDI7JFX4UZMF
var body: some View {
PagingList(
success: listContent,
fetchInitial: { try await API.getPosts(minId: 0, count: 30) },
fetchMore: { try await API.getPosts(minId: $0.id + 1, count: 30) }
)
}
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
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4XJUDI 'FUDI #JOEBCMF'FUDI 4JNQMF'FUDI
ঢ়ଶͷૢ࡞
ʢඇಉظॲཧʣ
ར༻ऀ👨💻
෦🤖
ར༻ऀՄೳ👨💻
෦🤖 ෦🤖
ঢ়ଶͷऔಘ Մೳ⭕ Մೳ⭕ Մೳ⭕ ෆՄೳ❌
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
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FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
؆ܿ͞
ΧελϚΠζੑ
4XJUDI 'FUDI #JOEBCMF'FUDI 4JNQMF'FUDI
ঢ়ଶͷૢ࡞
ʢඇಉظॲཧʣ
ར༻ऀ👨💻
෦🤖
ར༻ऀՄೳ👨💻
෦🤖 ෦🤖
ঢ়ଶͷऔಘ Մೳ⭕ Մೳ⭕ Մೳ⭕ ෆՄೳ❌
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w 👍ϘΠϥʔϓϨʔτΛճආͭͭ͠ɺΧελϚΠζੑ͋Δ
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
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w 👍ϘΠϥʔϓϨʔτΛճආͭͭ͠ɺΧελϚΠζੑ͋Δ
w 👍σβΠϯͷ౷ҰʹޮՌత
w ϩʔυදࣔΛίϯϙʔωϯτͰڞ௨ԽͳͲ
w σβΠϯγεςϜͱ૬ੑ͕ྑ͍
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
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w 👍ϘΠϥʔϓϨʔτΛճආͭͭ͠ɺΧελϚΠζੑ͋Δ
w 👍σβΠϯͷ౷ҰʹޮՌత
w ϩʔυදࣔΛίϯϙʔωϯτͰڞ௨ԽͳͲ
w σβΠϯγεςϜͱ૬ੑ͕ྑ͍
w ͦΕͰແཧͳΒFOVNΛͰTXJUDI
FOVNίϯϙʔωϯτʹΑΔঢ়ଶཧ
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·ͱΊ
w FOVNͷදݱྗΛ্͛Ε༷ʑͳ༷ʹରԠՄೳ
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·ͱΊ
w FOVNͷදݱྗΛ্͛Ε༷ʑͳ༷ʹରԠՄೳ
w ࠷దͳཻΛબ
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·ͱΊ
w FOVNͷදݱྗΛ্͛Ε༷ʑͳ༷ʹରԠՄೳ
w ࠷దͳཻΛબ
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w ϘΠϥʔϓϨʔτΛճආͭͭ͠ɺΧελϚΠζͰ͖Δ
w ڍಈɾσβΠϯͷ౷ҰʹޮՌత
w ࠷దͳ࣮Λબ
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ࢀߟ
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