react native实现监控手势上下拉动效果

react native实现监控手势进行上下拉动效果,详细核心代码如下:

代码：

import {PanResponder} from 'react-native';


var Dimensions = require('Dimensions');
const deviceHeight = Dimensions.get("window").height;
const deviceWidth = Dimensions.get("window").width;

class TaskfinishedPage extends Component {
  constructor(props) {
    super(props);
    console.disableYellowBox = true;
    this.state = {
      silderMargin: deviceHeight-230,
    };
      this.lastY1 = this.state.silderMargin;
  }
 
  componentWillMount () {

    this._panResponder = PanResponder.create({
      onStartShouldSetPanResponder: (evt, gestureState) => {
          return true;
      },
      onMoveShouldSetPanResponder:  (evt, gestureState) => {
          return true;
      },
      onPanResponderGrant: (evt, gestureState) => {
          this._highlight();
      },
      onPanResponderMove: (evt, gestureState) => {
          console.log(`gestureState.dx : ${gestureState.dx}   gestureState.dy : ${gestureState.dy}`);
          if(50 {
          this._unhighlight();
        
          this.lastY1 = this.state.silderMargin;
      },
      onPanResponderTerminate: (evt, gestureState) => {
      },
  });
  }


//这两个方法手触摸以及离开时触发;
  _unhighlight(){
    this.setState({
        sliderBackgroundcolor: 'transparent',
    });
}

_highlight(){
    this.setState({
        sliderBackgroundcolor: 'transparent',
    });
}


 render() {
    return (
      

        

          
             {    
                NavigationUtil.resetGoBack(this.props.navigation);
            }}>
              
            
          
          
          Finshed任务详情
          
          
        
        
          
       
            
          
          
 
          
      
    );
    }


const styles = {
  panelView: {
    width: deviceWidth-20,
    height: 410,
    marginLeft:10,
    marginRight:10,
    borderRadius:6,  
 }
}

export default TaskfinishedPage;

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。