Angular2 材质“md-icon"不是已知元素 [英] Angular2 material 'md-icon' is not a known element
问题描述
我有一个使用@angular2-material 2.0.0-alpha.8-2 版本的angular2 应用程序.一切正常.现在我决定将材料版本升级到最新版本,即 2.0.0-alpha.9-3.我遵循了 GETTING_STARTED 中提到的步骤.早些时候,我导入了以下单个模块:
I have angular2 application which is using @angular2-material 2.0.0-alpha.8-2 version. Everything works fine. Now I decided to upgrade material version to latest i.e. 2.0.0-alpha.9-3. I followed steps mentioned in GETTING_STARTED. Earlier I had imported individual modules as below:
@NgModule({
imports: [
BrowserModule,
FormsModule,
HttpModule,
RouterModule,
MdIconModule,
MdButtonModule,
MdCardModule,
MdCheckboxModule,
....
....
但是 2.0.0-alpha.9-3 版本的更改日志说:
However change log of 2.0.0-alpha.9-3 version says:
Angular Material 已从 @angular2-material/... 包更改为 @angular/material 下的单个包.伴随此更改,还有一个新的 NgModule, MaterialModule ,它包含所有组件.
"Angular Material has changed from @angular2-material/... packages to a single package under @angular/material . Along with this change, there is a new NgModule, MaterialModule , that contains all of the components."
所以我删除了明确导入的材料模块并将其更改为:
So I removed explicitly imported material modules and changed it to:
@NgModule({
imports: [
BrowserModule,
FormsModule,
HttpModule,
RouterModule,
MaterialModule.forRoot(),
....
....
此更改后,我收到以下错误
After this change I am getting following error
'md-icon' 不是已知元素:
'md-icon' is not a known element:
- 如果md-icon"是一个 Angular 组件,则验证它是否是该模块的一部分.
- 如果md-icon"是一个 Web 组件,则将CUSTOM_ELEMENTS_SCHEMA"添加到该组件的@NgModule.schemas"以抑制此消息.
我是否需要显式导入单个模块或如更改日志中提到的那样 MaterialModule 包含所有组件,我不应该显式导入单个模块?如果我不应该导入单个模块,那么错误的根源是什么?
Do I need to import individual modules explicitly or as mentioned in change log MaterialModule contains all components and I should not explicitly import individual modules? If I shouldn't import individual modules then what could be source of error?
推荐答案
export
部分怎么样?你在那里提供了 MaterialModule
吗?
What about the export
section? Did you provide MaterialModule
there?
@NgModule({
imports: [
MaterialModule.forRoot()
],
exports: [
MaterialModule
]
})
记得在 index.html 中提供图标样式:
Remember to provide icon styles in your index.html:
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
之后,您应该可以在视图中使用图标:
After that you should be able to use icons in your views:
<md-icon>delete</md-icon>
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