Angular 2 – EXCEPTION:_this.subscribe不是函数 – 自定义验
发布时间:2020-12-17 07:17:32 所属栏目:安全 来源:网络整理
导读:我正在尝试实现自定义验证规则来验证是否选中了复选框. 但是我收到了一个错误 error_handler.js:46 EXCEPTION: _this.subscribe is not a function 当我尝试添加自定义验证器时 validator.ts import {Control} from "angular/common"; interface ValidationR
我正在尝试实现自定义验证规则来验证是否选中了复选框.
但是我收到了一个错误 error_handler.js:46 EXCEPTION: _this.subscribe is not a function 当我尝试添加自定义验证器时
import {Control} from "angular/common"; interface ValidationResult { [key: string]: any; } export class CustomValidators { static validateChecked(c: Control): ValidationResult { return (c.value); } }
import {Component} from '@angular/core'; import {FormBuilder,FormGroup,Validators,FormControl} from '@angular/forms'; import {CustomValidators} from './validators.ts' @Component({ selector: 'wizard',templateUrl: './template.html',}) /** * @todo - check how first select is automatically active * @todo - export form presets to form class */ export class Wizard { myForm: FormGroup; privacy: boolean; // Prefilling the FormBuilder constructor(private horizonService: HorizonService,fb: FormBuilder) { this.myForm = fb.group({ 'privacy': ['',Validators.required,CustomValidators.validateChecked],}); } onSubmit(values: string): void { console.log('you submitted value: ',values); } }
如果需要多个验证器,则应使用Validators.compose.所以你的代码应该是这样的:
constructor(private horizonService: HorizonService,fb: FormBuilder) { this.myForm = fb.group({ 'privacy': ['',Validators.compose([Validators.required,CustomValidators.validateChecked])],}); } 您可以阅读有关验证器here的精彩文章. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |