Angular 在角度方向上设置两个或多个DIV位置的动画
我需要帮助任意匹配动态渲染的2个或更多div的位置开关。 下面是一个简单的例子:Angular 在角度方向上设置两个或多个DIV位置的动画,angular,Angular,我需要帮助任意匹配动态渲染的2个或更多div的位置开关。 下面是一个简单的例子: let objects: Array<number> = []; objects.push(1); objects.push(2); let对象:数组=[]; 物体。推(1); 物体。推(2); 模板: <div *ngFor="let obj of objects"> content {{object}} </div> 内容{{object}
let objects: Array<number> = [];
objects.push(1);
objects.push(2);
let对象:数组=[];
物体。推(1);
物体。推(2);
模板:
<div *ngFor="let obj of objects">
content {{object}}
</div>
内容{{object}
从模板中,用户可以更改对象的位置,将对象“1”移动到第二个位置,对象“2”将成为第一个位置
我需要一个动画来清楚地向用户显示运动。实际上,DOM中的结果是:
之前:
<div>
content 1
</div>
<div>
content 2
</div>
内容1
内容2
之后:
<div>
content 2
</div>
<div>
content 1
</div>
内容2
内容1
结果是通过修改源阵列、更改元素位置获得的
我可以使用哪种解决方案?我可以使用更复杂的对象来处理这个问题,这样我就可以在需要时修改代码
谢谢我研究后的最佳解决方案是使用cdk/拖放您可以导入此库并使用它拖放元素 您只需在代码中添加以下行,就可以了 .ts文件应包含以下代码
export class CdkDragDropSortingExample {
movies = [
'Episode I - The Phantom Menace',
'Episode II - Attack of the Clones'
];
drop(event: CdkDragDrop<string[]>) {
moveItemInArray(this.movies, event.previousIndex, event.currentIndex);
}
}
我不知道这是否是一个好的解决方案,但这是我唯一能想象的。我的想法是用绝对位置保存div的“副本”,并用不透明度=0或可见性=隐藏保持“原始”。当更改数组时,用setTimeout制作一个手动动画,更改“副本”的顶部和左侧 用密码。假设您有一个数组数据
data:any[]=[1,2,3,4,5]
类似html的
<div >
<ng-container *ngFor="let item of data;let i=index">
<div #origin style="opacity:0" >{{item}}</div>
<div #copy style="position:absolute" [style.z-index]="i" >{{item}}</div>
</ng-container>
</div>
你可以在地图上看到
更新为什么不制定指令
更新2我使用offsetTop和offsetLeft并添加window.scrollX和window.scrollY更新指令。此外,我还添加了一个新属性:pos0,如果为true,则首先在pos 0,0中创建“copy”
@Directive({ selector: "[animate]" })
export class AnimateDirective implements OnInit {
original: any;
copy: any;
timing:string;
private player: AnimationPlayer;
@Input() set animate(value: string) {
this.timing = value || "450ms ease-in-out";
}
@Input('animatePos0') pos0:boolean=false;
constructor(
private templateRef: TemplateRef<any>,
private viewContainer: ViewContainerRef,
private builder: AnimationBuilder,
private renderer: Renderer2
) {}
ngOnInit() {
this.original = this.viewContainer.createEmbeddedView(
this.templateRef
).rootNodes[0];
setTimeout(() => {
this.copy = this.viewContainer.createEmbeddedView(
this.templateRef
).rootNodes[0];
this.renderer.setStyle(this.original, "visibility","hidden");
const rect = !this.pos0?
{top:this.original.offsetTop,left:this.original.offsetLeft}:
{top:0,left:0};
this.renderer.setStyle(this.copy, "position", "absolute");
this.renderer.setStyle(this.copy, "top", rect.top+ window.scrollY + "px");
this.renderer.setStyle(this.copy, "left", rect.left+ window.scrollX + "px");
});
}
animateGo() {
setTimeout(() => {
const rect = {top:this.original.offsetTop,left:this.original.offsetLeft}
const myAnimation = this.builder.build([
animate(this.timing,
style({ top: rect.top+ window.scrollY,
left: rect.left+ window.scrollX }))
]);
this.player = myAnimation.create(this.copy);
this.player.play();
});
}
}
看a这个解决方案很好,我喜欢@请小心,我忘了添加window.scrollX和window.scrollY。我也不确定是使用GetBoundClientre还是offsetTop以及原始版本的OffsetLeft。无论如何,我对物体的“边缘”有困难。我不太确定是否能按时纠正这个问题。我用它改进了stackblitz,并在添加时为“animate”添加了一个新属性“pos0”
<div >
<ng-container *ngFor="let item of data;let i=index">
<div #origin style="opacity:0" >{{item}}</div>
<div #copy style="position:absolute" [style.z-index]="i" >{{item}}</div>
</ng-container>
</div>
@ViewChildren("origin") bars: QueryList<ElementRef>;
@ViewChildren("copy") copies: QueryList<ElementRef>;
ngAfterViewInit()
{
const bars:any[]=this.bars.toArray().map(x=>x.nativeElement.getBoundingClientRect());
this.copies.forEach((x,index) => {
x.nativeElement.style.top=bars[index].top+"px"
x.nativeElement.style.left=bars[index].left+"px"
});
}
click() {
this.data=this.data
.map(x=>({item:x,value:Math.random()}))
.sort((a,b)=>a.value-b.value)
.map(x=>x.item)
setTimeout(()=>{
const bars:any[]=this.bars.toArray().map
(x=>x.nativeElement.getBoundingClientRect());
this.copies.forEach((x,index) => {
this.animate(x.nativeElement, bars[index].top+"px",bars[index].left+"px");
});
})
}
animate(element: any, top: string,left:string) {
const myAnimation = this.builder.build([
animate(this.timing, style({ top: top,left:left }))
]);
this.player = myAnimation.create(element);
this.player.play();
}
@Directive({ selector: "[animate]" })
export class AnimateDirective implements OnInit {
original: any;
copy: any;
timing:string;
private player: AnimationPlayer;
@Input() set animate(value: string) {
this.timing = value || "450ms ease-in-out";
}
@Input('animatePos0') pos0:boolean=false;
constructor(
private templateRef: TemplateRef<any>,
private viewContainer: ViewContainerRef,
private builder: AnimationBuilder,
private renderer: Renderer2
) {}
ngOnInit() {
this.original = this.viewContainer.createEmbeddedView(
this.templateRef
).rootNodes[0];
setTimeout(() => {
this.copy = this.viewContainer.createEmbeddedView(
this.templateRef
).rootNodes[0];
this.renderer.setStyle(this.original, "visibility","hidden");
const rect = !this.pos0?
{top:this.original.offsetTop,left:this.original.offsetLeft}:
{top:0,left:0};
this.renderer.setStyle(this.copy, "position", "absolute");
this.renderer.setStyle(this.copy, "top", rect.top+ window.scrollY + "px");
this.renderer.setStyle(this.copy, "left", rect.left+ window.scrollX + "px");
});
}
animateGo() {
setTimeout(() => {
const rect = {top:this.original.offsetTop,left:this.original.offsetLeft}
const myAnimation = this.builder.build([
animate(this.timing,
style({ top: rect.top+ window.scrollY,
left: rect.left+ window.scrollX }))
]);
this.player = myAnimation.create(this.copy);
this.player.play();
});
}
}
<ng-container *ngFor="let item of data;let i=index">
<div *animate="'150ms ease-in-out'"> {{item}}-{{i}}
</div>
</ng-container>
@ViewChildren(AnimateDirective) items:QueryList<AnimateDirective>
this.items.forEach(x=>x.animateGo())