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我在使用setState函数时遇到了困难。我正在使用react-draggable软件包,我可以拖动我的div,但是当我释放鼠标按钮时,它似乎没有设置xy坐标,因此div只是回到原来的位置。有人可以告诉我我在做什么错了onControlledDrag吗?谢谢!React和React-Draggable中的setState问题
export class DraggableAnswer extends React.Component {
constructor(props, context) {
super(props, context);
this.controlledPosition ={ x: -25, y: 10};
}
onControlledDrag(e, position) {
console.log(position);
const {x, y} = position;
this.setState({
controlledPosition: {x: x, y: y}
});
}
render() {
const dragHandlers = {onStart: this.onStart, onStop: this.onStop};
return (
<div className="draggableAnswerBlock">
<Draggable
zIndex={100}
position={this.controlledPosition}
{...dragHandlers}
onDrag={this.onControlledDrag.bind(this)}>
<div className="box">
Change my position
</div>
</Draggable>
</div>
)
}
}
非常感谢你,这真的为我阐明了整个this.state和setState关系是如何工作的! – Coherent