我对angular2有疑问。我正在创建一些组件,并希望有这样的东西:
这是我的DogComponent类:
@Component({
selector: "dog",
template: "dog.template.html"
})
class DogComponent
{
@Input() image: string;
}
dog.template.html中的模板:
<div>
<!-- Content of <top> should go here -->
<img class="after" src="dogs/{{image}}" />
<!-- Content of <bottom> should go here -->
</div>
当我使用DogComponent时,它应该使用传递的src创建img-tag,但也可以在图像之前和之后查看其他HTML部分。
所以最后,如果我写这段代码:
<dog image="garry.png">
<top>
<h1>This is Garry!</h1>
</top>
<bottom>
<span>He is my favorite dog!</span>
</bottom>
</dog>
它应该呈现给:
<dog>
<div>
<h1>This is Garry!</h1>
<img src="dog.png" />
<span>He is my favorite dog!</span>
</div>
</dog>
有人能回答我的问题吗?
太棒了!
修改
感谢您的建议,所以现在我更新了我的代码段并添加了DogListComponent
。如果我在应用程序的某处使用标记dog-list
,则应查看最后一个片段(浏览器结果)。希望现在有点清楚。
dog.component.ts
@Component({
selector: "dog",
templateUrl: "dog.template.html"
})
class DogComponent
{
@Input() image: string;
}
dog.template.html
<div>
<!-- Content of <top> should go here -->
<img class="after" src="dogs/{{image}}" />
<!-- Content of <bottom> should go here -->
</div>
dog_list.component.ts
@Component({
selector: "dog-list",
templateUrl: "dog-list.template.html"
})
class DogListComponent
{
}
狗list.template.html
<dog image="garry.png">
<top>
<h1>This is Garry!</h1>
</top>
<bottom>
<span>He is my favorite dog!</span>
</bottom>
</dog>
<dog image="linda.png">
<top>
<h1>My little Linda :)</h1>
</top>
<bottom>
<span>She is my cutest dog!</span>
</bottom>
</dog>
<dog image="rex.png">
<top>
<h1>And here is Rex!</h1>
</top>
<bottom>
<span>DANGEROUS!</span>
</bottom>
</dog>
浏览器结果:
<dog-list>
<dog image="garry.png">
<top>
<h1>This is Garry!</h1>
</top>
<bottom>
<span>He is my favorite dog!</span>
</bottom>
</dog>
<dog image="linda.png">
<top>
<h1>My little Linda :)</h1>
</top>
<bottom>
<span>She is my cutest dog!</span>
</bottom>
</dog>
<dog image="rex.png">
<top>
<h1>And here is Rex!</h1>
</top>
<bottom>
<span>DANGEROUS!</span>
</bottom>
</dog>
<dog-list>
答案 0 :(得分:7)
所以我找到了解决方案!我需要使用<ng-content>
。
dog.template.html看起来像这样:
<div>
<ng-content select="top"></ng-content>
<img class="after" src="dogs/{{image}}" />
<ng-content select="bottom"></ng-content>
</div>
然后它会在我的div中插入指定的<top>-tags
和<bottom>-tags
。
答案 1 :(得分:2)
看起来你误解了选择角色。选择器<dog></dog>
将被其他组件(例如AppComponent)用于显示您的dog组件HTML。因此,没有必要在他自己的组件HTML中使用选择器。
此外,如果要将外部文件用作模板,则语法为templateUrl
而不是template
。所以:
@Component({
selector: "dog",
templateUrl: "dog.template.html" // make sure the path to the file is correct
在dog.template.html
中,只需输入您的HTML代码:
<div>
<h1>This is Garry!</h1>
<img src="dogs/{{image}}" />
<!-- the component deliver the value image (dog.png) to your template -->
<span>He is my favorite dog!</span>
</div>
修改以回复您的更新代码。
如果我理解得很清楚,您可以从pictures
访问一系列dog_list.component.ts
狗。
您可以在模板中使用*ngFor="let picture of pictures"
之类的内容。您没有说明您的数据是什么样的,但如果您的数组格式为arr = [{'topTile':'This is Garry!', 'picture': 'garry.png', 'bottomTitle':'He is my favorite dog!' }, {}, ...]
<!-- Parent component template (dog_list) -->
<div *ngFor="let data of arr">
<top>
<h1>{{ data.topTitle }}</h1> <!-- This is Garry!, ... -->
</top>
<dog [image]="data.picture"></dog><!-- Bind data to children component dog with value garry.png -->
<bottom>
<span>{{ data.bottomTitle }}</span> <!-- He is my favorite dog!,... -->
</bottom>
</div>
有关更多详细信息,可能有角度模板语法文档可能会有所帮助: https://angular.io/docs/ts/latest/guide/template-syntax.html