在我用Angular CLI 1.0.0-beta.11-webpack.9-1构建的Angular 2.0.0-rc.7 + Angular Material 2.0.0-alpha.8-1应用程序中，我从rc.5 + alpha.7-4(通过1.0.0-beta.11-webpack.8 NG CLI)升级后得到以下错误:
main.bundle.js:44545 Error: No provider for Overlay!
at NoProviderError.Error (native)
at NoProviderError.BaseError [as constructor] (http://localhost:4200/main.bundle.js:7032:34)
at NoProviderError.AbstractProviderError [as constructor] (http://localhost:4200/main.bundle.js:44258:16)
at new NoProviderError (http://localhost:4200/main.bundle.js:44289:16)
at ReflectiveInjector_._throwOrNull (http://localhost:4200/main.bundle.js:65311:19)
at ReflectiveInjector_._getByKeyDefault (http://localhost:4200/main.bundle.js:65339:25)
at ReflectiveInjector_._getByKey (http://localhost:4200/main.bundle.js:65302:25)
at ReflectiveInjector_.get (http://localhost:4200/main.bundle.js:65111:21)
at NgModuleInjector.get (http://localhost:4200/main.bundle.js:45173:52)
at ElementInjector.get (http://localhost:4200/main.bundle.js:65475:48)ErrorHandler.handleError @ main.bundle.js:44545
main.bundle.js:44548ERROR CONTEXT:ErrorHandler.handleError @ main.bundle.js:44548
我的package.json依赖项是:
"dependencies": {
"@angular/common": "2.0.0-rc.7",
"@angular/compiler": "2.0.0-rc.7",
"@angular/core": "2.0.0-rc.7",
"@angular/forms": "2.0.0-rc.7",
"@angular/http": "2.0.0-rc.7",
"@angular/platform-browser": "2.0.0-rc.7",
"@angular/platform-browser-dynamic": "2.0.0-rc.7",
"@angular/router": "3.0.0-rc.3",
"core-js": "^2.4.1",
"rxjs": "5.0.0-beta.12",
"ts-helpers": "^1.1.1",
"zone.js": "^0.6.21",
"@angular2-material/button": "2.0.0-alpha.8-1",
"@angular2-material/button-toggle": "2.0.0-alpha.8-1",
"@angular2-material/card": "2.0.0-alpha.8-1",
"@angular2-material/checkbox": "2.0.0-alpha.8-1",
"@angular2-material/core": "2.0.0-alpha.8-1",
"@angular2-material/grid-list": "2.0.0-alpha.8-1",
"@angular2-material/icon": "2.0.0-alpha.8-1",
"@angular2-material/input": "2.0.0-alpha.8-1",
"@angular2-material/list": "2.0.0-alpha.8-1",
"@angular2-material/menu": "2.0.0-alpha.8-1",
"@angular2-material/progress-bar": "2.0.0-alpha.8-1",
"@angular2-material/progress-circle": "2.0.0-alpha.8-1",
"@angular2-material/radio": "2.0.0-alpha.8-1",
"@angular2-material/sidenav": "2.0.0-alpha.8-1",
"@angular2-material/slide-toggle": "2.0.0-alpha.8-1",
"@angular2-material/slider": "2.0.0-alpha.8-1",
"@angular2-material/tabs": "2.0.0-alpha.8-1",
"@angular2-material/toolbar": "2.0.0-alpha.8-1",
"@angular2-material/tooltip": "2.0.0-alpha.8-1"
},
和
"devDependencies": {
"@types/jasmine": "^2.2.30",
"angular-cli": "1.0.0-beta.11-webpack.9-1",
"codelyzer": "~0.0.26",
"jasmine-core": "2.4.1",
"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": "4.0.5",
"ts-node": "1.2.1",
"tslint": "3.13.0",
"typescript": "2.0.2"
}
我的main.ts是:
import './polyfills.ts';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { environment } from './environments/environment';
import { AppModule } from './app/';
if (environment.production) {
enableProdMode();
}
platformBrowserDynamic().bootstrapModule(AppModule);
下面是@NgModule在app.module.ts中的定义:
@NgModule({
declarations: [
AppComponent,
// other application-specific components...
PageNotFoundComponent,
],
imports: [
BrowserModule,
CommonModule,
ReactiveFormsModule,
MdButtonModule,
// other MD modules...
MdTooltipModule,
OverlayModule,
PortalModule,
RtlModule,
routing // application routing
],
providers : [
Title,
MdIconRegistry,
// set of application-specific providers...
],
entryComponents: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule {
}
你知道这是怎么回事吗?
我设法通过将此添加到app.module.js来消除此错误:
import {OVERLAY_PROVIDERS} from "@angular/material";
@NgModule({
imports: [...
],
declarations: [...],
providers: [OVERLAY_PROVIDERS],
bootstrap: [...]
})
编辑(2018年5月):
OVERLAY_PROVIDERS现在已弃用。用OverlayModule代替
import { OverlayModule } from '@angular/cdk/overlay';
@NgModule({
imports: [
OverlayModule
],
declarations: [...],
providers: [...],
bootstrap: [...]
})
你应该做MaterialModule.forRoot()(见UPDATE2)，应该解决这个问题。
供参考这是基本材料设置:
import { MaterialModule, MdIconRegistry, } from '@angular/material';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
FormsModule,
HttpModule,
MaterialModule.forRoot()
],
providers: [MdIconRegistry],
bootstrap: [AppComponent]
})
export class AppModule { }
查看更多详细信息http://iterity.io/2016/10/01/angular/getting-started-with-angular-material-2/
UPDATE1:官方材料2文档已经更新，所以你也可以看看这个https://material.angular.io/guide/getting-started
UPDATE2:在最新的材料2(从2.0.0-beta)。2及以上)不需要再使用MaterialModule.forRoot()，只用MaterialModule代替。
Module forRoot的使用已被弃用，并将在下一个版本。相反，只需直接导入MaterialModule:
@NgModule({
imports: [
...
MaterialModule,
...
]
...
});
UPFATE3:从2.0.0-beta.8版本开始，angular材料依赖于@angular/cdk，所以你需要npm安装它。
对于@angular/material版本6及以后:在根模块中导入OverlayModule(例如在app.module.ts中)。在惰性加载模块中导入不起作用!细节:https://github.com/angular/material2/issues/10820 issuecomment - 386733368
我通过导入我自己的MaterialModule来解决这个问题，它看起来像这样
import { NgModule } from '@angular/core';
import {
MdButtonModule,
MdCardModule,
...
} from '@angular/material';
@NgModule({
imports: [
MdButtonModule,
MdCardModule,
...
],
exports: [
MdButtonModule,
MdCardModule,
...
]
})
export class MaterialModule {}
放到规范文件中，如下所示
import { MaterialModule } from 'app/material/material.module';
TestBed.configureTestingModule({
imports: [MaterialModule],
...
});
MdTooltipModule.forRoot()应该也能解决你的问题，因为它还包括providers: [OVERLAY_PROVIDERS]。
这是来自来源:
export class MdTooltipModule {
static forRoot(): ModuleWithProviders {
return {
ngModule: MdTooltipModule,
providers: OVERLAY_PROVIDERS,
};
}
}