[英]How to start an animation after the previous one has finished
當我按下按鈕時,我想讓藍色矩形變小,然后向右移動。
在當前代碼中,將其變小的動畫和將其向右移動的動畫同時發生。
上一個動畫完成后如何開始動畫?
示例代碼:
import SwiftUI
struct ContentView: View {
@State private var scale: CGFloat = 1
@State private var offsetX: CGFloat = 1
var body: some View {
VStack {
Button(
action: {
withAnimation {
scale = scale - 0.1
}
withAnimation {
offsetX = offsetX + 25
}
},
label: {
Text("Tap Me")
}
)
RectangleView().scaleEffect(
scale
)
.offset(
x: offsetX,
y: 0
)
}
}
}
struct RectangleView: View {
var body: some View {
Rectangle().fill(
Color.blue
)
.frame(
width: 200,
height: 150
)
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
您可以按持續時間和延遲進行調整。
struct ContentView: View {
@State private var scale: CGFloat = 1
@State private var offsetX: CGFloat = 1
var body: some View {
VStack {
Button(
action: {
withAnimation(.linear(duration: 0.2)) { //<-- Here
scale = scale - 0.1
}
withAnimation(Animation.default.delay(0.2)) { //<-- Here
offsetX = offsetX + 25
}
},
label: {
Text("Tap Me")
}
)
RectangleView().scaleEffect(
scale
)
.offset(
x: offsetX,
y: 0
)
}
}
}
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