我無法旋轉圓形路徑中的綠色部分。我想動態設定無限時間。我為 ProgressView 創建了一個結構，并希望在我的專案中將其設定為 ProgressView。
如何實作旋轉路徑中的紅黑顏色曲線設計
struct CircularProgressView: View {
@State var progressValue: Float = 0.0
var body: some View {
ZStack {
ProgressBar(progress: self.$progressValue)
.frame(width: 150.0, height: 150.0)
.padding(40.0)
}.onAppear{
self.incrementProgress()
}
}
func incrementProgress() {
let randomValue = Float([0.012, 0.022, 0.034, 0.016, 0.11, 0.012].randomElement()!)
self.progressValue = randomValue
}
}
struct ProgressBar: View {
@Binding var progress: Float
var body: some View {
ZStack {
Circle()
.stroke(lineWidth: 20.0)
.opacity(0.3)
.foregroundColor(Color.red)
Circle()
.trim(from: 0.0, to: CGFloat(min(self.progress, 2.0)))
.stroke(style: StrokeStyle(lineWidth: 20.0, lineCap: .round, lineJoin: .round))
.foregroundColor(Color.green)
.rotationEffect(Angle(degrees: 270))
.animation(.linear)
}
}
}
這是預覽結構。
struct CircularProgressView_Previews: PreviewProvider {
static var previews: some View {
CircularProgressView()
}
}
提前感謝您幫助我。
uj5u.com熱心網友回復：
struct CircularProgressView: View {
@State var progressValue: Float = 0.0
@State private var isLoaderVisible: Bool = false
var degree = 90
var body: some View {
ZStack {
ProgressBar(progress: self.$progressValue)
.frame(width: 150.0, height: 150.0)
.padding(40.0)
}.overlay(LoaderView(showLoader: isLoaderVisible))
.onAppear {
isLoaderVisible.toggle()
}
}
}
struct ProgressBar: View {
@Binding var progress: Float
@State var degree:Double = 90
var body: some View {
ZStack {
Circle()
.stroke(lineWidth: 20.0)
.foregroundColor(Color.green)
}
}
}
struct CircularProgressView_Previews: PreviewProvider {
static var previews: some View {
CircularProgressView()
}
}
// LoaderView 的列舉
public enum LoaderAnimation {
case low, medium, high
var animationSpeed: Double {
switch self {
case .low: return 1.0
case .medium: return 0.8
case .high: return 10.2
}
}
}
這是我們在疊加層和影片上設定的 LoaderView
public struct LoaderView: View {
var loaderAnimationSpeed: LoaderAnimation? = .high
var showLoader: Bool = false
public var body: some View {
GeometryReader { reader in
ZStack {
Circle()
.stroke(lineWidth: 20.0)
.opacity(0.3)
.foregroundColor(Color.yellow)
Circle()
.trim(from: 0.6, to: 1)
.stroke(.green, lineWidth: 20)
.rotationEffect(.degrees(showLoader ? 360 : 0))
.animation(Animation.easeInOut(duration: showLoader ? loaderAnimationSpeed?.animationSpeed ?? 0.0 : 1).repeatForever(autoreverses: false), value: showLoader)
}
}
}
public init( loaderAnimationSpeed: LoaderAnimation? = .medium, showLoader: Bool) {
self.loaderAnimationSpeed = loaderAnimationSpeed
self.showLoader = showLoader
}
}
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標籤：IOS迅速动画迅捷动态的