sorakoro
commented
4 years ago SwiftUI Preview について
前回の続き
Closed ngtk closed 4 years ago
sorakoro
commented
4 years ago 前回の続き
ngtk
commented
4 years ago https://swiftwithmajid.com/2019/12/11/building-bottom-sheet-in-swiftui/
struct ContentView: View {
@State private var bottomSheetShown = false
var body: some View {
GeometryReader { geometry in
Color.green
BottomSheetView(
isOpen: self.$bottomSheetShown,
maxHeight: geometry.size.height * 0.7
) {
Color.blue
}
}.edgesIgnoringSafeArea(.all)
}
}@GestureState private var translation: CGFloat = 0
var body: some View {
GeometryReader { geometry in
VStack(spacing: 0) {
self.indicator.padding()
self.content
}
.frame(width: geometry.size.width, height: self.maxHeight, alignment: .top)
.background(Color(.secondarySystemBackground))
.cornerRadius(Constants.radius)
.frame(height: geometry.size.height, alignment: .bottom)
.offset(y: max(self.offset + self.translation, 0))
.animation(.interactiveSpring())
.gesture(
DragGesture().updating(self.$translation) { value, state, _ in
state = value.translation.height // インタラクティブに位置を更新
}.onEnded { value in
let snapDistance = self.maxHeight * Constants.snapRatio
guard abs(value.translation.height) > snapDistance else { // 移動距離が一定を超えていたらスナップする
return
}
self.isOpen = value.translation.height < 0 // 閉じるか開くかどちらかにスナップする
}
)
}
}code: https://gist.github.com/mecid/78eab34d05498d6c60ae0f162bfd81ee
ngtk
commented
4 years ago https://www.vadimbulavin.com/advanced-guide-to-userdefaults-in-swift/
var storage = Storage()
storage.isFirstLaunch = true
print(storage.isFirstLaunch) // true
jiro
commented
4 years ago https://medium.com/eureka-engineering/thought-about-arch-for-swiftui-1b0496d8094
状態管理のためのライブラリ https://github.com/muukii/Verge
hiranodept
commented
4 years ago UITestでアプリの起動時間を測る。
Xcode11で新しく使えるようになった、measure(metrics:options:block:) メソッドを使う。
func testLaunchPerformance() {
if #available(iOS 13.0, *) {
measure(metrics: [XCTOSSignpostMetric.applicationLaunch]) {
XCUIApplication().launch()
}
}
}実行するとテストを5回行う。
baselineを設定することで起動が遅くなった時に検知できる？
ref: WWDC 2019 Session 417 Improving Battery Life and Performance ref: Testing App Launch Time
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