javascript - Angular 2 : Toggle buttons are not working as expected

Question

我正在尝试在 md-list 中显示 Material 2 切换按钮。不知道为什么它们显示为单选按钮。

<md-list>
  <md-button-toggle-group #group="mdButtonToggleGroup">
    <md-list-item><md-button-toggle>First Button</md-button-toggle></md-list-item>
    <md-list-item><md-button-toggle>Second Button</md-button-toggle></md-list-item>
  </md-button-toggle-group>
</md-list>

app.module.ts

import {MaterialModule} from "@angular/material";
import 'hammerjs';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    CommonModule,
    FormsModule,
    HttpModule,
    MaterialModule
  ],
  providers: [__platform_browser_private__.BROWSER_SANITIZATION_PROVIDERS],
  bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);

依赖关系

"dependencies": {
    "@angular/common": "^2.3.1",
    "@angular/compiler": "^2.3.1",
    "@angular/core": "^2.3.1",
    "@angular/forms": "^2.3.1",
    "@angular/http": "^2.3.1",
    "@angular/material": "^2.0.0-beta.2",
    "@angular/platform-browser": "^2.3.1",
    "@angular/platform-browser-dynamic": "^2.3.1",
    "@angular/router": "^3.3.1",
    "core-js": "^2.4.1",
    "hammerjs": "^2.0.8",
    "rxjs": "^5.0.1",
    "ts-helpers": "^1.1.1",
    "zone.js": "^0.7.2"
  },
  "devDependencies": {
    "@angular/compiler-cli": "^2.3.1",
    "@types/hammerjs": "^2.0.34",
    "@types/jasmine": "2.5.38",
    "@types/node": "^6.0.42",
    "angular-cli": "1.0.0-beta.24",
    "codelyzer": "~2.0.0-beta.1",
    "jasmine-core": "2.5.2",
    "jasmine-spec-reporter": "2.5.0",
    "karma": "1.2.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-cli": "^1.0.1",
    "karma-jasmine": "^1.0.2",
    "karma-remap-istanbul": "^0.2.1",
    "protractor": "~4.0.13",
    "ts-node": "1.2.1",
    "tslint": "^4.0.2",
    "typescript": "~2.0.3"
  }

Answer 1

鉴于它在 plunker 中有效:http://plnkr.co/edit/AiqtVcMFo8ShzLe18ArU?p=preview

我建议检查此列表:

1. 始终首先检查版本(可能是某些旧版本中的错误)
2. 我不是 100% 确定您可以将 md-list 子标签与 md-button-toggle-group 子标签混合使用...来检查来源(由 plunker 提供)。潜在的问题是您嵌套的标签呈锯齿状...

正常:

<md-list>
     <md-list-item>
     </md-list-item>
</md-list> 

和

<md-button-toggle-group>
     <md-button-toggle>
     </md-button-toggle>
</md-button-toggle-group>

但是你有:

<md-list>
    <md-button-toggle-group>
         <md-list-item>
             <md-button-toggle>
             </md-button-toggle>
         </md-list-item>
    </md-button-toggle-group>
</md-list> 

css 样式和代码 angular2 指令是如何编译的，没有人知道压倒一切的风格。有时，样式可以使用/deep/(或 >>>)修饰符遍历所有代码。

在 AppModule 中使用 MaterialModule.forRoot()