HarmonyOS鸿蒙Next 5.x系统中React native的measureLayout方法获取不到值
HarmonyOS鸿蒙Next 5.x系统中React native的measureLayout方法获取不到值
运行后报以后错误信息:
ERROR Warning: Warning: ref.measureLayout must be called with a ref to a native component.
在 iOS 和 Android 都没问题的;
使用 measureInWindow
和 measure
也都没问题,就 measureLayout
报错;
完整代码如下:
import React, { useRef } from 'react';
import { Text, View, Button, findNodeHandle } from 'react-native';
import { SafeAreaProvider, SafeAreaView } from 'react-native-safe-area-context';
const HarmonyDemo = () => {
const viewARef = useRef<View | null>(null);
const viewBRef = useRef<View | null>(null);
const measureLayout = () => {
if (viewARef.current && viewBRef.current) {
const viewAHandle = findNodeHandle(viewARef.current);
const viewBHandle = findNodeHandle(viewBRef.current);
if (viewAHandle && viewBHandle) {
viewARef.current.measureLayout(
viewBHandle,
(x, y, width, height) => {
console.log(`X: ${x}, Y: ${y}, Width: ${width}, Height: ${height}`);
},
() => {
console.error(1);
},
);
}
}
};
return (
<SafeAreaProvider>
<SafeAreaView
style={{
flex: 1,
backgroundColor: '#fc0',
marginTop: 35,
}}
>
<View style={{ flex: 1, padding: 20 }}>
<View
ref={viewBRef}
style={{
backgroundColor: 'lightgray',
height: 150,
padding: 10,
}}
>
<Text>组件A</Text>
<View style={{ height: 20 }} />
<View
ref={viewARef}
style={{
backgroundColor: 'skyblue',
height: 50,
padding: 10,
}}
>
<Text>组件B</Text>
</View>
</View>
<Button title="获取组件B相对组件A的距离" onPress={measureLayout} />
</View>
</SafeAreaView>
</SafeAreaProvider>
);
};
export default HarmonyDemo;
更多关于HarmonyOS鸿蒙Next 5.x系统中React native的measureLayout方法获取不到值的实战教程也可以访问 https://www.itying.com/category-93-b0.html
已解决,鸿蒙系统中,使用的时候,直接用ref.current就是了,不能使用findNodeHandle
const measureLayout = () => {
if (viewARef.current && viewBRef.current) {
viewARef.current.measureLayout(
viewBRef.current,
(x, y, width, height) => {
console.log(`X: ${x}, Y: ${y}, Width: ${width}, Height: ${height}`);
},
() => {
console.error(1);
},
);
}
};
更多关于HarmonyOS鸿蒙Next 5.x系统中React native的measureLayout方法获取不到值的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html
在HarmonyOS Next 5.x中,React Native的measureLayout
方法获取不到值可能是由于原生组件与JS线程通信问题导致。鸿蒙的渲染机制与Android/iOS存在差异,需检查以下方面:
- 确保调用的组件已完成渲染(使用onLayout回调确认)
- 组件的
collapsable
属性需设置为false
- 检查ref是否正确绑定到鸿蒙原生组件
- 在鸿蒙环境中,部分RN组件可能需要使用鸿蒙专用封装
可尝试改用UIAutomator提供的测试接口或鸿蒙专用的组件测量API作为替代方案。
在HarmonyOS Next 5.x系统中,React Native的measureLayout方法确实存在兼容性问题。这是由于HarmonyOS的渲染机制与Android/iOS存在差异导致的。建议采用以下替代方案:
- 使用measure方法替代measureLayout:
const measureLayout = () => {
if (viewARef.current && viewBRef.current) {
viewARef.current.measure((x, y, width, height, pageX, pageY) => {
viewBRef.current.measure((x2, y2, width2, height2, pageX2, pageY2) => {
const relativeX = pageX - pageX2;
const relativeY = pageY - pageY2;
console.log(`相对位置: X: ${relativeX}, Y: ${relativeY}`);
});
});
}
};
- 或者使用measureInWindow:
const measureLayout = () => {
if (viewARef.current && viewBRef.current) {
viewARef.current.measureInWindow((x, y, width, height) => {
viewBRef.current.measureInWindow((x2, y2, width2, height2) => {
const relativeX = x - x2;
const relativeY = y - y2;
console.log(`相对位置: X: ${relativeX}, Y: ${relativeY}`);
});
});
}
};
这两种方法在HarmonyOS Next上都能正常工作,可以获取到组件间的相对位置信息。