是否未加载Angular-tree-component ASync子项？

Question

我正在使用npm install --save angular-tree-component子节点不加载当我单击父节点时，它显示“正在加载...”以下消息是我的代码

options: ITreeOptions = {
    getChildren: this.getChildren.bind(this)
  };

  getChildren(node: any) {
    debugger
    this.TreeService.getChildren((callback) => {
      this.asyncChildren = callback;             
      const newNodes = this.asyncChildren.map((c) => Object.assign({}, c));
      return new Promise((resolve, reject) => {
        setTimeout(() => resolve(newNodes), 1000);
      });
    });
  }

Answer 1

看起来您缺少返回promise ( typescript定义有点难打开，它只需要'any‘作为返回值)。作为描述的here，您必须返回promise或数组。

getChildren(node: any) {
debugger
return /*missing return*/ this.TreeService.getChildren((callback) => {
  this.asyncChildren = callback;             
  const newNodes = this.asyncChildren.map((c) => Object.assign({}, c));
  return new Promise((resolve, reject) => {
    setTimeout(() => resolve(newNodes), 1000);
  });
});

}