如何根据子视图的高度设置父视图的高度

问题描述

我想编写一个自定义的父 View，其中包括一个 Text 组件子视图或两个 Text 组件子视图.有没有办法根据 Text 视图的高度设置父 View 的高度?

I want to write a customized parent View which includes either one Text componet subView or two Text component subViews. Is there a way to set the parent View's height based on the Text view's height?

class ParentView extends Component {
  constructor(props) {
    super(props);
  }

  render() {
    const {
      titleText,
      bodyText,
    } = this.props;

    //if titleText is passed to props, measure it's height;
    //if bodyText is passed to props, measure it's height;
    // set contentContainer height = titleText + bodyText + someMargin
    return (
      <View style={styles.contentContainer}>
        {titleText && <Text style={styles.title}>
          {titleText}
        </Text>}
        {bodyText && <Text style={styles.body}>
          {bodyText}
        </Text>}
      </View>
    );
  }
}

推荐答案

您可以在 View 容器上设置 flex:0

You can set flex:0 on your View container

const styles = StyleSheet.create({
  contentContainer: {
    flex: 0
  }
});

通过这种方式，它会根据孩子的身高进行扩展.

with this way it will expand according to the children height.

关于 flex 属性的一些信息:

A few info about flex property:

当 flex 为正数时，它使组件变得灵活并且它将与它的 flex 值成正比.所以一个带有 flex 的组件设置为 2 将占用两倍于 flex 设置为 1 的组件的空间.

flex 为 0 时，组件根据宽高调整大小而且不灵活.

When flex is 0, the component is sized according to width and height and it is inflexible.

当 flex 为 -1 时，组件通常根据宽度和高度.但是，如果没有足够的空间，组件将缩小到它的 minWidth 和 minHeight.

When flex is -1, the component is normally sized according width and height. However, if there's not enough space, the component will shrink to its minWidth and minHeight.

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