有没有一种方法可以自动使用动画更改文本值？

Question

我有一个加载屏幕，我想在其中显示一个通过动画自动更改其值的文本。

I have my logo rotating indefinitely without any button action

//logo
                    Image("reny")
                        .rotationEffect(.degrees(rotateDegree))
                        .onAppear(perform: {
                                 withAnimation(Animation.linear(duration: 4).repeatForever(autoreverses: false)) {
                                     self.rotateDegree = 360
                                 }
                             })

I assumed it was possible to do the same for a text using a string array but it doesn't work

@State var texts = ["Find the Apartment you like", "send an application", "we'll approve you in secs baby!"]
    @State var textIndex : Int = 0

//introduction text
                    Text(texts[textIndex]).bold()
                        .font(.title)
                        .onAppear(perform: {
                            withAnimation(Animation.linear(duration: 2).repeatForever(autoreverses: false)) {
                                textIndex += 1
                            }
                             })

does anybody know how to change the value of a text with an animation automatically?

我的目的是展示如何在此加载时间内使用该应用程序。

Answer 1

这是一种可能的方法 - 仅根据索引替换文本，并在出现后不断更改索引。

Tested with Xcode 13.4 / iOS 15.5

Main part:

private func next() {
    var next = textIndex + 1
    if next == texts.count {
        next = 0
    }
    withAnimation(Animation.linear(duration: 2)) {
        textIndex = next
    }
    DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
        self.next()
    }
}

and text itself

Text(texts[textIndex]).bold()
    .font(.title).id(textIndex)
    .onAppear(perform: {
        next()
    })