你可以用对象展开来做这个 代码:

 this.setState((state)=>({ someProperty:{...state.someProperty,flag:false}})

这将适用于更多嵌套的属性

There is another option and this works if there are multiple items in the list of objects: copy the object using this.state.Obj to a variable (say temp), use filter() method to traverse through the object and grab the particular element you want to change into one object(name it updateObj) and the remaining list of object into another object(name this as restObj). Now edit the contents of object you want to update creating a new item (say newItem). Then call this.setUpdate() and use spread operators to assing new list of objects to the parent object.

this.state = {someProperty: { flag:true, }}


var temp=[...this.state.someProperty]
var restObj = temp.filter((item) => item.flag !== true);
var updateObj = temp.filter((item) => item.flag === true);

var newItem = {
  flag: false
};
this.setState({ someProperty: [...restObj, newItem] });

const newState = Object.assign({}, this.state);
newState.property.nestedProperty = "new value";
this.setState(newState);

这显然不是正确或最好的方法，但在我看来，这是更清晰的:

this.state.hugeNestedObject = hugeNestedObject; 
this.state.anotherHugeNestedObject = anotherHugeNestedObject; 

this.setState({})

然而，React本身应该迭代思想嵌套对象，并相应地更新状态和DOM。

有很多库可以提供帮助。例如，使用immutability-helper:

import update from 'immutability-helper';

const newState = update(this.state, {
  someProperty: {flag: {$set: false}},
};
this.setState(newState);

使用lodash/fp设置:

import {set} from 'lodash/fp';

const newState = set(["someProperty", "flag"], false, this.state);

使用lodash/fp合并:

import {merge} from 'lodash/fp';

const newState = merge(this.state, {
  someProperty: {flag: false},
});

我发现这对我很有用，在我的案例中有一个项目表单，例如，你有一个id和一个名称，我宁愿为一个嵌套的项目维护状态。

return (
  <div>
      <h2>Project Details</h2>
      <form>
        <Input label="ID" group type="number" value={this.state.project.id} onChange={(event) => this.setState({ project: {...this.state.project, id: event.target.value}})} />
        <Input label="Name" group type="text" value={this.state.project.name} onChange={(event) => this.setState({ project: {...this.state.project, name: event.target.value}})} />
      </form> 
  </div>
)

让我知道!