angular 2 animate 笔记
好久没有在这里写点笔记了。时隔已久,angular1 去 angular2 咯
笔记来源:https://angular.cn/docs/ts/latest/guide/animations.html
动画基于这标准:https://w3c.github.io/web-animations/
以下是基本设置
template: `
<button (click)="heroState = 'active'">enter</button>
<button (click)="heroState = null">leave</button>
<button (click)="changeAnimate()">animate</button>
<div *ngIf="heroState" [@heroState]="heroState"
(@heroState.start)="animationStarted($event)"
(@heroState.done)="animationDone($event)"
style="width:100px; height:100px;">example</div>
{{heroState}}
`,
animations: [
trigger('heroState', [
state('inactive', style({
backgroundColor: '#eee',
transform: 'scale(1)'
})),
state('active', style({
backgroundColor: '#cfd8dc',
transform: 'scale(1.1)'
})),
transition('inactive => active', animate('100ms ease-in')),
transition('active => inactive', animate('100ms ease-out'))
])
]
在animate 中,需要理解几样东西就能明白真个笔记。
1. @trigger (绑定elem)
2. 状态 (通过状态转换改变style)
3. 过渡 (动画)
状态与过渡 :state 是状态,表明样式。过渡是动画,声明某个状态去到某个状态
state('inactive', style({
backgroundColor: '#eee',
transform: 'scale(1)'
})),
state('active', style({
backgroundColor: '#cfd8dc',
transform: 'scale(1.1)'
})),
transition('inactive => active', animate('100ms ease-in')),
transition('active => inactive', animate('100ms ease-out'))
合拼过渡
transition('inactive <=> active', animate('100ms ease-out'))
转换不保留样式:在过渡添加style,意思是当状态转换时,会使用指定样式,接着执行动画,结束后移除样式
transition('inactive => active', [
style({
backgroundColor: '#cfd8dc',
transform: 'scale(1.3)'
}),
animate('80ms ease-in', style({
backgroundColor: '#eee',
transform: 'scale(1)'
}))
]),
通配符*,进场,出场 : 都是状态转换的方式
transition('inactive => *', [
style({transform: 'translateX(-100%)'}),
animate(100)
])
transition('* => inactive', [
animate(100, style({transform: 'translateX(100%)'}))
])
transition('* => void', [ //:leave 省略写法
animate(100, style({transform: 'translateX(100%)'}))
])
transition('void => *', [ //:enter 省略写法
animate(100, style({transform: 'translateX(100%)'}))
])
动画变量 : duration, delay,缓动(easing)函数
animate('2000ms 10 ease-in', style({
backgroundColor: '#f00',
transform: 'translateX(100%)'
})),
高级写法:keyframe (css3 原理)
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})
]))
组合animate : 处理混合动画
group([
animate('0.3s 0.1s ease', style({
transform: 'translateX(0)',
width: 120
})),
animate('0.3s ease', style({
opacity: 1
}))
])
回调 : $event 可以得到 fromState
,toState
和totalTime
template: `
<ul>
<li *ngFor="let hero of heroes"
(@flyInOut.start)="animationStarted($event)"
(@flyInOut.done)="animationDone($event)"
[@flyInOut]="'in'">
{{hero.name}}
</li>
</ul>
`,