注意 - 单选按钮绑定现在是RC4及以上版本的支持特性 - 参见这个答案
单选按钮示例,使用自定义的RadioControlValueAccessor,类似于CheckboxControlValueAccessor(已更新为Angular 2 rc-1)
App.ts
import {Component} from "@angular/core";
import {FORM_DIRECTIVES} from "@angular/common";
import {RadioControlValueAccessor} from "./radio_value_accessor";
import {bootstrap} from '@angular/platform-browser-dynamic';
@Component({
selector: "my-app",
templateUrl: "template.html",
directives: [FORM_DIRECTIVES, RadioControlValueAccessor]
})
export class App {
model;
constructor() {
this.model = {
sex: "female"
};
}
}
模板.html
<div>
<form action="">
<input type="radio" [(ngModel)]="model.sex" name="sex" value="male">Male<br>
<input type="radio" [(ngModel)]="model.sex" name="sex" value="female">Female
</form>
<input type="button" value="select male" (click)="model.sex='male'">
<input type="button" value="select female" (click)="model.sex='female'">
<div>Selected Radio: {{model.sex}}</div>
</div>
radio_value_accessor.ts
import {Directive, Renderer, ElementRef, forwardRef} from '@angular/core';
import {NG_VALUE_ACCESSOR, ControlValueAccessor} from '@angular/common';
export const RADIO_VALUE_ACCESSOR: any = {
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => RadioControlValueAccessor),
multi: true
};
@Directive({
selector:
'input[type=radio][ngControl],input[type=radio][ngFormControl],input[type=radio][ngModel]',
host: {'(change)': 'onChange($event.target.value)', '(blur)': 'onTouched()'},
bindings: [RADIO_VALUE_ACCESSOR]
})
export class RadioControlValueAccessor implements ControlValueAccessor {
onChange = (_) => {};
onTouched = () => {};
constructor(private _renderer: Renderer, private _elementRef: ElementRef) {}
writeValue(value: any): void {
this._renderer.setElementProperty(this._elementRef.nativeElement, 'checked', value == this._elementRef.nativeElement.value);
}
registerOnChange(fn: (_: any) => {}): void { this.onChange = fn; }
registerOnTouched(fn: () => {}): void { this.onTouched = fn; }
}
来源: https://github.com/angular2-school/angular2-radio-button
Plunker在线演示: http://plnkr.co/edit/aggee6An1iHfwsqGoE3q?p=preview