React Native，无法更新值

Question

我正在尝试更新 title 的值，但它没有更新值有人可以告诉我发生了什么 EditPost.js

class EditScreen extends Component {

  render() {
    return (
      <KeyboardAvoidingView
        behavior="position"
        keyboardVerticalOffset={Platform.OS === "ios" ? 0 : 100}
      >
        <Image
          style={styles.image}
          source={this.props.navigation.getParam("image")}
        />

        <View style={styles.detailContainer}>
          <AppTextInput
            value={this.props.navigation.getParam("title")}
            conChangeText={(text) =>
              this.props.navigation.setParams({ title: text })
            }
          />
          <AppTextInput value={this.props.navigation.getParam("des")} />
        </View>
        <AppButton
          text="Save"
          style={styles.button}
          onPress={() => {
            this.props.navigation.getParam("onEdit");
            this.props.navigation.goBack();
          }}
        />

home.js

 onEdit = (data) => {
    const newPosts = this.state.post.map((item) => {
      if (item.key === data.key) return data;
      else return item;
    });
    this.setState({ post: newPosts, editMode: false });
  };

请帮帮我...

Answer 1

你有一个错字，为什么你不使用 useState 代替？

<AppTextInput
            value={this.props.navigation.getParam("title")}
            conChangeText={(text) => --> typo, should be onChangeText ?
              this.props.navigation.setParams({ title: text })
            }
/>