javascript - React Native Button onPress 函数示例

Question

使用两者有什么区别，什么时候应该使用一个

<Button onPress={this.refreshData}>

<Button onPress={()=>this.refreshData()}>

Answer 1

如果您不需要将参数传递给您的函数，您应该这样做:

<Button onPress={this.refreshData}>

这样做 <Button onPress={()=>this.refreshData()}>可能会破坏优化。
来自 React 文档:

Using an arrow function in render creates a new function each time the component renders, which may break optimizations based on strict identity comparison.