Angular 2 动画 *ngFor 列表项一个接一个地使用 RC 5 中的新动画支持 [英] Angular 2 animate *ngFor list item one after other using new Animation support in RC 5
问题描述
我有一个组件可以从服务器获取项目列表,然后在模板中使用 *ngFor 显示该列表.
I have a component that fetches list of items from server and then display that list using *ngFor in template.
我希望列表显示一些动画,但一个接一个.我的意思是每个列表项都应该一个一个地添加动画.
I want the list to be displayed with some animation, but one after other. I mean each list item should animate in after other.
我正在尝试这样的事情:
I am trying something like this:
import { Component, Input, trigger, state, animate, transition, style } from '@angular/core';
@Component({
selector: 'list-item',
template: ` <li @flyInOut="'in'">{{item}}</li>`,
animations: [
trigger('flyInOut', [
state('in', style({ transform: 'translateX(0)' })),
transition('void => *', [
style({ transform: 'translateX(-100%)' }),
animate(100)
]),
transition('* => void', [
animate(100, style({ transform: 'translateX(100%)' }))
])
])
]
})
export class ListItemComponent {
@Input() item: any;
}
在我的列表组件模板中,我像这样使用它:
and in my list component template I am using it like:
<ul>
<li *ngFor="let item of list;">
<list-item [item]="item"></list-item>
</li>
</ul>
它所做的是一次显示整个列表.我想要一个带有一些动画的项目一个一个地进入.
What it does is displays whole list at once. I want items to enter one by one with some animation.
推荐答案
我在文档中找不到对 ngFor
的 stagger
支持,但是现在有 animation.done
events
,可以用来制作 staggering ngFor
I couldn't find stagger
support on ngFor
in the documentation, but
there's now animation.done
events
, which can be used to make staggering ngFor
@Component({
selector: 'my-app',
template: `
<ul>
<li *ngFor="let hero of staggeringHeroes; let i = index"
(@flyInOut.done)="doNext()"
[@flyInOut]="'in'" (click)="removeMe(i)">
{{hero}}
</li>
</ul>
`,
animations: [
trigger('flyInOut', [
state('in', style({transform: 'translateX(0)'})),
transition('void => *', [
animate(300, keyframes([
style({opacity: 0, transform: 'translateX(-100%)', offset: 0}),
style({opacity: 1, transform: 'translateX(15px)', offset: 0.3}),
style({opacity: 1, transform: 'translateX(0)', offset: 1.0})
]))
]),
transition('* => void', [
animate(300, keyframes([
style({opacity: 1, transform: 'translateX(0)', offset: 0}),
style({opacity: 1, transform: 'translateX(-15px)', offset: 0.7}),
style({opacity: 0, transform: 'translateX(100%)', offset: 1.0})
]))
])
])
]
})
export class App {
heroes: any[] = ['Alpha', 'Bravo', 'Charlie', 'Delta', 'Echo', 'Foxtrot', 'Golf', 'Hotel', 'India'];
next: number = 0;
staggeringHeroes: any[] = [];
constructor(){
this.doNext();
}
doNext() {
if(this.next < this.heroes.length) {
this.staggeringHeroes.push(this.heroes[this.next++]);
}
}
removeMe(i) {
this.staggeringHeroes.splice(i, 1);
}
}
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