React Native 中的动画背景色 [英] Animating backgroundColor in React Native

问题描述

我将如何在 React Native 中将动画从一种颜色转换为另一种颜色.我发现通过插入 Animated.Value 您可以通过以下方式对颜色进行动画处理:

How would I go about animating from one color to another in React Native. I've found that by interpolating an Animated.Value you can animate colors by:

var BLACK = 0;
var RED = 1;
var BLUE = 2;

backgroundColor: this.state.color.interpolate({
  inputRange: [BLACK, RED, BLUE],
  outputRange: ['rgb(0, 0, 0)', 'rgb(255, 0, 0)', 'rgb(0, 0, 255)']
})

和

Animated.timing(this.state.color, {toValue: RED}).start();

但是使用这种方法，从BLACK到BLUE，你必须经过红色.在混合中添加更多颜色，您最终会进入 1980 年代的迪斯科舞厅.

But using this method, going from BLACK to BLUE, you have to go through red. Add more colors to the mix and you end up in a 1980s disco.

是否有另一种方法可以让您直接从一种颜色切换到另一种颜色?

Is there another way of doing this that allows you to go straight from one color to another?

推荐答案

如果你有 Animated.Value 比方说 x，你可以像这样插入颜色:

Given you have Animated.Value lets say x, you can interpolate color like this:

render() {
    var color = this.state.x.interpolate({
        inputRange: [0, 300],
        outputRange: ['rgba(255, 0, 0, 1)', 'rgba(0, 255, 0, 1)']
    });

    return (
        <Animated.View style={{backgroundColor:color}}></Animated.View>
    );
}

您可以在我在 github.

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