功能齐全的轮播---基于angular7

摘要：轮播有的功能应该都有及以上的版本应该都可以动画效果用的是自带的没有做进一步的处理专注于做过测试应该没有功能图片自动轮播每张图片对应下面的小圆圈红色代表当前选中图片前进和后退按钮做了节流处理代码

轮播有的功能,应该都有

angular2及以上的版本应该都可以

动画效果用的是angular自带的animations

css没有做进一步的处理,专注于js

做过测试应该没有bug

  carousel works!


  

      
      

            
      
        
    
 
    


    

            
    
    

        
        
    

import { Component, OnInit } from "@angular/core";
import {trigger,style,transition,query,animate,group} from "@angular/animations"
@Component({
  selector: "app-carousel",
  templateUrl: "./carousel.component.html",
  styleUrls: ["./carousel.component.css"],
    animations:[
      trigger("carousel",[
          transition(":increment",[
              group([
                  query(":enter",[
                        style({transform:"translateX(-100%)"}),
                        animate("1s")
                    ]),
                    query(":leave",[
                        animate("1s",style({transform:"translateX(100%)"}))
                    ])
                ]) 
            ]),
            transition(":decrement",[
              group([
                  query(":enter",[
                        style({transform:"translateX(100%)"}),
                        animate("1s")
                    ]),
                    query(":leave",[
                        animate("1s",style({transform:"translateX(-100%)"}))
                    ])
                ]) 
            ]),
        ])
    ]
})
export class CarouselComponent implements OnInit {
  url:string="../../../assets/"
  imgs=[
      {id:1,name:"1.jpg",state:true},
        {id:2,name:"2.jpg",state:false},
        {id:3,name:"3.jpg",state:false}
    ]
    state=0;
    id:number;
    i=0;
    switch=true
    execTime:number
  constructor() { }
  fn(){
      this.i++;
        if(this.i>this.imgs.length-1){
            this.i=0;
        }
      this.imgs.forEach(val=>{val.state=false})
        this.imgs[this.i].state=true;
        this.state+=0.1;
    }
  ngOnInit() {
    this.id=setInterval(this.fn.bind(this),3000) 
  }
  stop(){
      clearInterval(this.id)
    }
    start(){
      this.id=setInterval(this.fn.bind(this),3000) 
    }
    circleEnter(id){
      //console.log(id);
        this.i=id-1;
        this.imgs.forEach(val=>{val.state=false})
        this.imgs[id-1].state=true;
        //this.state+=0.1;
      this.stop();
    }
    circleLeave(){
      this.start();
    }
    go(){
      this.throttle(this.fn.bind(this),1500)
      //this.fn()
    }
    back(){
      let fn=function(){
          //console.log("exec fn");
          this.i--;
            if(this.i<0){
                this.i=this.imgs.length-1;
            }
            this.imgs.forEach(val=>{val.state=false})
            this.imgs[this.i].state=true;
            this.state-=0.1;
        }
      this.throttle(fn.bind(this),1500)
    }
    
  throttle(fn,interval){
        if(new Date().getTime()-this.execTime>interval){this.switch=true}
        console.log(this.switch);
      if(this.switch){
            fn();
            this.switch=false;
            this.execTime=new Date().getTime();
        }
        
    }
    
}

ul{
  position:relative;
  height:200px;
}
.imgP{
  position:absolute;
  list-style:none;
}
.circle{
  width:10px;
  height:10px;
  border-radius:50%;
  border:1px solid #000;
  float:left;
}
.color{
  background-color:red;
}