Swiftui 如何在没有按钮的情况下在多个文本视图之间自动切换
我想自动更改文本。我可以让它与切换按钮,但我想做它没有按钮。我希望它每3秒交替一次 代码如下:Swiftui 如何在没有按钮的情况下在多个文本视图之间自动切换,swiftui,Swiftui,我想自动更改文本。我可以让它与切换按钮,但我想做它没有按钮。我希望它每3秒交替一次 代码如下: struct ContentView: View { @State var homeString = true var body: some View { VStack { Text(homeString ? "Welcome." : "How can I help you?").font(.title)
struct ContentView: View {
@State var homeString = true
var body: some View {
VStack {
Text(homeString ? "Welcome." : "How can I help you?").font(.title)
.animation(.easeInOut(duration:1.0))
Button(action: {self.shortString.toggle()}) {
Text("Toggle").padding()
}
}
}
}
您可以创建一个计时器,每3秒触发一次,并切换
主字符串
:
struct ContentView: View {
@State var homeString = true
@State var timer: Cancellable?
var body: some View {
VStack {
Text(homeString ? "Welcome." : "How can I help you?")
.font(.title)
.animation(.easeInOut(duration: 1.0))
}
.onAppear {
self.timer = Timer.publish(every: 3, on: .main, in: .common)
.autoconnect()
.sink(receiveValue: { _ in self.homeString.toggle() })
}
}
}
如果要在任何时候停止计时器,只需调用:
timer?.cancel()