Drag
拖拽组件
- 兼容移动端的touch和pc端的mouse事件。
- 可通过onDrag设置抓取的回调函数, 返回抓取在屏幕上的位置, 分别保存在start和move中, 以x和y的形式展示。
- 可通过onDrop设置松开瞬间的回调函数, 返回松开时在屏幕上的位置, 保存在end中, 以x和y的形式展示。
示例:
<Drag onDrag={::this.onDrag} onDrop={::this.onDrop} style={{height:0}}>
<div className="box" ref={(box)=>{this.box = box}}>Drag</div>
</Drag>
onDrag(event,position){
this.prePosition = position.start;
this.nowPosition = position.move;
this.distanceX = this.preDistanceX + this.nowPosition.x - this.prePosition.x;
this.distanceY = this.preDistanceY + this.nowPosition.y - this.prePosition.y;
console.log(this.distanceX, this.distanceY);
}
onDrop(event,position){
this.preDistanceX = this.distanceX;
this.preDistanceY = this.distanceY;
}
Constructor
Drag
Drag
()
Example:
import React, { Component } from 'react';
import {Drag} from 'phoenix-ui';
import Code from "./code/code";
export default class toast extends Component{
constructor(props,context){
super(props,context);
this.preDistanceX = 0;
this.preDistanceY = 0;
this.distanceX = 0;
this.distanceY = 0;
}
onDrag(event,position){
this.prePosition = position.start;
this.nowPosition = position.move;
this.distanceX = this.preDistanceX + this.nowPosition.x - this.prePosition.x;
this.distanceY = this.preDistanceY + this.nowPosition.y - this.prePosition.y;
this.setBoxPosition(this.distanceX, this.distanceY);
}
onDrop(event,position){
this.preDistanceX = this.distanceX;
this.preDistanceY = this.distanceY;
}
setBoxPosition(x,y){
this.box.style.webkitTransform = 'translate('+x+'px,'+y+'px)';
this.box.style.transform = 'translate('+x+'px,'+y+'px)';
}
render(){
return(
<div>
<h2 className="comp-title">Drag</h2>
<h3 className="comp-type">Dragable Box demo</h3>
<Code target="drag" />
<div className="content-drag">
<Drag onDrag={::this.onDrag} onDrop={::this.onDrop} style={{height:0}}>
<div className="box" ref={(box)=>{this.box = box}}>Drag</div>
</Drag>
</div>
</div>
);
}
}
方法
onDrag
onDrag
()
抓取的执行函数,对应TouchStart/TouchMove
onDrop
onDrop
()
放开的执行函数,对应TouchEnd