我试图在显示屏上显示响应,但始终在角度7中出现此错误。我试图检查其他解决方案,但没有帮助。 ExpensesComponent.html:2错误错误:找不到其他内容 类型为“对象”的支持对象“ [对象对象]”。仅NgFor 支持绑定到数组等Iterable。
这是在控制台中对我的请求的响应。 内容:Array(4)
class dashboardViewController: UIViewController {
func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
switch item.tag {
case 0:
subTitleLabel.text = "Temperature"
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier: "ViewController") as! ViewController
self.view.insertSubview(viewController.view!, belowSubview: self.dashboardTabBar)
}
}
此处是应将这些响应设置为局部变量的函数。
0: {id: 2, description: "LED TV", expenseDate: "2019-04-
11T18:00:00.000+0000", expenseAmount: 2000}
1: {id: 3, description: "LED TV 2", expenseDate: "2019-04-
11T18:00:00.000+0000", expenseAmount: 2000}
2: {id: 4, description: "LED TV 3", expenseDate: "2019-04-
11T18:00:00.000+0000", expenseAmount: 13000}
3: {id: 5, description: "LED TV 4", expenseDate: "2019-04-
11T18:00:00.000+0000", expenseAmount: 14000}
这是费用类别。
expenseList : Expense[];
refreshExpensePage(){
this.expenseDataService.retriveAllExpenses(this.page).subscribe(
res=>{console.log(res);
console.log(res);
this.expenseList = res;
}
);
这是应该在表中显示数据的html。
export class Expense{
constructor(
public id:number,
public description : string,
public expenseDate: Date,
public expenseAmount: number
){
}
}
答案 0 :(得分:0)
与其使用构造函数创建类,不如尝试定义为接口以定义对象。
export interface Person {
id:number;
description : string;
expenseDate: any;
expenseAmount: number;
}
并在组件中导入接口(以防接口在其他文件中定义),然后将接口声明为默认数据类型
expenseList : Person[];
然后在 expenseList
中分配适当的对象数组一切顺利