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perf(banner): TabView 프리로딩 완화·다운샘플링·요청취소 적용

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배너/캐러셀에서 인접 페이지 프리로딩과 원본 해상도 디코딩으로
발생하던 메모리 스파이크와 중복 로드를 완화했습니다.

- 각 페이지에서 이미지 URL을 onAppear에 바인딩, onDisappear에 nil 해제
  → 인접 페이지 프리로딩 시 중복 로드·디코딩 방지, 요청 취소 실효
- 모든 KFImage에 cancelOnDisappear(true) 일관 적용
- 큰 배너 이미지에 downsampling(size:) 적용(디코딩 메모리 절감)
- 자동 슬라이드 주기 3초 → 4초로 완화(동시 로드 빈도 감소)
- TabView 페이지를 서브뷰로 분리하여 뷰 로직 단순화 및 재사용성 향상

결과: 동시 디코딩 감소, 피크 메모리 사용량 하락, 자동 슬라이드 안정성 개선
This commit is contained in:
Yu Sung
2025-10-23 15:31:52 +09:00
parent 9568cb7ecd
commit 8c58c08a85
5 changed files with 203 additions and 143 deletions
Download Patch File Download Diff File Expand all files Collapse all files

104
SodaLive/Sources/Live/EventBanner/SectionEventBannerView.swift
View File

@@ -11,7 +11,7 @@ import Kingfisher
struct SectionEventBannerView: View {
@State private var currentIndex = 0
@State private var timer = Timer.publish(every: 3, on: .main, in: .common).autoconnect()
@State private var timer = Timer.publish(every: 4, on: .main, in: .common).autoconnect()
@AppStorage("token") private var token: String = UserDefaults.string(forKey: UserDefaultsKey.token)
let items: [EventItem]
@@ -21,51 +21,13 @@ struct SectionEventBannerView: View {
TabView(selection: $currentIndex) {
ForEach(0..<items.count, id: \.self) { index in
let item = items[index]
if let url = item.thumbnailImageUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) {
KFImage(URL(string: url))
.cancelOnDisappear(true)
.resizable()
.scaledToFill()
.frame(
width: screenSize().width,
height: screenSize().width * 300 / 1000,
alignment: .center
)
.tag(index)
.onTapGesture {
if !token.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
if let _ = item.detailImageUrl {
AppState.shared.setAppStep(step: .eventDetail(event: item))
} else if let link = item.link, link.trimmingCharacters(in: .whitespaces).count > 0, let url = URL(string: link), UIApplication.shared.canOpenURL(url) {
UIApplication.shared.open(url)
}
} else {
AppState.shared.setAppStep(step: .login)
}
}
} else {
KFImage(URL(string: item.thumbnailImageUrl))
.cancelOnDisappear(true)
.resizable()
.scaledToFill()
.frame(
width: screenSize().width,
height: screenSize().width * 300 / 1000,
alignment: .center
)
.tag(index)
.onTapGesture {
if !token.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
if let _ = item.detailImageUrl {
AppState.shared.setAppStep(step: .eventDetail(event: item))
} else if let link = item.link, link.trimmingCharacters(in: .whitespaces).count > 0, let url = URL(string: link), UIApplication.shared.canOpenURL(url) {
UIApplication.shared.open(url)
}
} else {
AppState.shared.setAppStep(step: .login)
}
}
}
SectionEventBannerPage(
item: item,
width: screenSize().width,
height: screenSize().width * 300 / 1000,
token: token
)
.tag(index)
}
}
.tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
@@ -85,7 +47,7 @@ struct SectionEventBannerView: View {
}
}
.onAppear {
timer = Timer.publish(every: 3, on: .main, in: .common).autoconnect()
timer = Timer.publish(every: 4, on: .main, in: .common).autoconnect()
}
.onDisappear {
timer.upstream.connect().cancel()
@@ -109,3 +71,51 @@ struct SectionEventBannerView_Previews: PreviewProvider {
SectionEventBannerView(items: [])
}
}
private struct SectionEventBannerPage: View {
let item: EventItem
let width: CGFloat
let height: CGFloat
let token: String
@State private var boundURL: URL?
var body: some View {
Group {
if let boundURL {
KFImage(boundURL)
.cancelOnDisappear(true)
.downsampling(size: CGSize(width: width, height: height))
.resizable()
.scaledToFill()
.frame(width: width, height: height, alignment: .center)
} else {
Color.clear
.frame(width: width, height: height, alignment: .center)
}
}
.contentShape(Rectangle())
.onTapGesture {
if !token.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
if let _ = item.detailImageUrl {
AppState.shared.setAppStep(step: .eventDetail(event: item))
} else if let link = item.link,
link.trimmingCharacters(in: .whitespaces).count > 0,
let url = URL(string: link),
UIApplication.shared.canOpenURL(url) {
UIApplication.shared.open(url)
}
} else {
AppState.shared.setAppStep(step: .login)
}
}
.onAppear {
let urlString = item.thumbnailImageUrl.addingPercentEncoding(
withAllowedCharacters: .urlQueryAllowed
) ?? item.thumbnailImageUrl
boundURL = URL(string: urlString)
}
.onDisappear {
boundURL = nil
}
}
}