【发布时间】：2020-01-25 11:37:20
【问题描述】：
我无法在 react native 中渲染从多次调用 rest API 中获取的多个图像。
对于 Rest API 参考，我使用 woocommerce rest API 来获取订单详细信息。 https://woocommerce.github.io/woocommerce-rest-api-docs/#retrieve-an-order
问题是订单详情在rest API 中没有line_items 的主图像。所以我需要通过product_id再次调用product details rest API来调用下面的每个product detail API来获取每个line_item对象的产品图片。
https://woocommerce.github.io/woocommerce-rest-api-docs/#retrieve-a-product
到目前为止，我已经编写了为每个 line_items 调用产品详细信息的逻辑，但是我的代码出现了以下错误。处理这种情况的最佳方法是什么？
Warning: Cannot update during an existing state transition (such as within `render`). Render methods should be a pure function of props and state.
Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate. React limits the number of nested updates to prevent infinite loops.
Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in %s.%s, the componentWillUnmount method,
下面是我的实现：
render() {
if (this.state.loading) {
return (
<View style={{ flex: 1, justifyContent: "center", alignContent: "center", padding: 20 }}>
<ActivityIndicator color='#96588a' size='large' />
</View>
)
}
return (
<ScrollView style={{ flex: 1 }}>
{this.displayOrderDataSection()}
{this.displayProductSection()}
{this.displayPaymentSection()}
{this.displayShippingDetailsSection()}
{this.displayBillingDetailsSection()}
</ScrollView>
);
}
getProductPrimaryImage = (productId) => {
let productData = null;
this.setState({ imageLoading: true });
let url = `${base_url}/wp-json/wc/v3/products/${productId}?consumer_key=${c_key}&consumer_secret=${c_secret}`
console.log(url);
fetch(url)
.then((response) => response.json())
.then((responseJson) => {
this.setState({
imageLoading: false,
error: responseJson.code || null,
});
productData = responseJson
})
.then(() => {
return productData ?
((Array.isArray(productData.images) && productData.images.length) ?
productData.images[0].src : null)
: null;
})
.catch((error) => {
this.setState({
error,
imageLoading: false,
})
});
}
getLineItems = () => {
let itemArray = [];
orderData.line_items.forEach(item => {
let imgSrc = this.getProductPrimaryImage(item.product_id)
itemArray.push(
<View key={item.id} style={{ flex: 1, flexDirection: 'row', backgroundColor: 'white' }}>
<View style={{ flex: 1, justifyContent: "center", alignContent: "center" }}>
<Image source={imgSrc}
style={{ height: 100, width: 100 }} resizeMode='contain' />
</View>
<View style={{ flex: 2, marginTop: 10, marginBottom: 10, justifyContent: "center" }}>
<View style={{ marginLeft: 10 }}>
<Text>{item.name}</Text>
<Text>SKU: {item.sku}</Text>
<Text>Price: {this.getCurrencySymbol()}{item.price.toFixed(2)}</Text>
<Text>Oty: {item.quantity}</Text>
<View>{this.getTMProductOptions(item.meta_data)}</View>
</View>
</View>
</View>
)
})
return itemArray;
}
displayProductSection = () => {
return (
<View style={styles.section}>
<Text style={styles.titleText}>Product</Text>
{this.getLineItems()}
</View>
)
}
【问题讨论】：
-
我要做的只是移动
fetch并将状态操作更新到componentDidMount生命周期事件中。这样你就像一个无限循环一样调用。
标签： reactjs rest react-native woocommerce woocommerce-rest-api