我有一个自定义输入组件,它正在更新验证和状态,但触摸/未触摸除外。其他所有状态(原始/肮脏)都按预期工作。
这是一个掠夺者:https://plnkr.co/edit/O9KWzwhjvySnXd7vyo71
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感谢您的帮助!
答案 0 :(得分:10)
刚刚接受了@sharpmachine的答案,这有助于解决我的问题。我只是想改进它:
不必在模板级别将blur
事件绑定到onTouched()
(这可能容易出错),而是可以将ControlValueAccessor
公开为Directive
并在那里绑定事件。
import { Directive, forwardRef } from '@angular/core';
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
export const CUSTOM_INPUT_CONTROL_VALUE_ACCESSOR: any = {
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => CustomInputAccessor),
multi: true
};
@Directive({
selector: 'my-custom-input',
host: {'(blur)': 'onTouched($event)'},
providers: [CUSTOM_INPUT_CONTROL_VALUE_ACCESSOR],
})
export class CustomInputAccessor implements ControlValueAccessor {
// The internal data model
private _value: any = '';
public onChange: any = (_) => { /*Empty*/ }
public onTouched: any = () => { /*Empty*/ }
get value(): any { return this._value; };
set value(v: any) {
if (v !== this._value) {
this._value = v;
this.onChange(v);
}
}
writeValue(value: any) {
this._value = value;
}
registerOnChange(fn: any) {
this.onChange = fn;
}
registerOnTouched(fn: any) {
this.onTouched = fn;
}
}
这样您就可以使用该组件,而无需在每次使用时绑定blur
事件。
希望它有所帮助!
答案 1 :(得分:4)
我犯了两个错误,比如一个旋钮。所以模板必须是:
<div class="form-group">
<label>CUSTOM INPUT</label>
<input type="text" class="form-control" [(ngModel)]="value" (blur)="onTouched($event)" required>
<p *ngIf="control?.errors?.required && control?.touched">Field is required</p>
<strong>Has input been touched: {{control.touched ? 'Yes' : 'No'}}</strong><br>
<strong>Is input untouched: {{control.untouched ? 'Yes' : 'No'}}</strong><br>
<strong>Is input dirty: {{control.dirty ? 'Yes' : 'No'}}</strong> <br>
<strong>Is input pristine: {{control.pristine ? 'Yes' : 'No'}}</strong>
</div>
<div>
In Custom Component: {{value}}
</div>
所以输入(blur)="onTouched($event)"
和<p *ngIf="control?.errors?.required && control?.touched">