WeChat Applet
Mini Program Development
WeChat applet implements drag and drop image touch event monitoring
WeChat applet implements drag and drop image touch event monitoring
This article mainly introduces relevant information on examples of WeChat applet implementing drag and drop image touch event monitoring. Here is a simple example of image touching and monitoring. Friends who need it can refer to it
Example of WeChat applet implementing drag and drop image touch event monitoring
You need to make a button floating on the scroll-view. I tried it.
Implementation renderings ：
There will also be operations similar to moving controls in Android. The idea is similar. Get the X Y variables of the displacement and set the coordinates for the control.
1.index.wxml
<image class="image-style" src="../../images/gundong.png" bindtap="ballClickEvent" style="bottom:{{ballBottom}}px;right:{{ballRight}}px;" bindtouchmove="ballMoveEvent">
</image>Simply set a picture and add touch event listening. Click event listening. According to the touch The event gets the X Y displacement and is set to the position of the image
2.index.js
//index.js
//获取应用实例
var app = getApp()
Page({
data: {
ballBottom: 240,
ballRight: 120,
screenHeight: 0,
screenWidth: 0,
},
onLoad: function () { //获取屏幕宽高
var _this = this;
wx.getSystemInfo({
success: function (res) {
_this.setData({
screenHeight: res.windowHeight,
screenWidth: res.windowWidth,
});
}
});
},
ballMoveEvent: function (e) {
console.log('我被拖动了....')
var touchs = e.touches[0];
var pageX = touchs.pageX;
var pageY = touchs.pageY;
console.log('pageX: ' + pageX)
console.log('pageY: ' + pageY)
//防止坐标越界,view宽高的一般
if (pageX < 30) return;
if (pageX > this.data.screenWidth - 30) return;
if (this.data.screenHeight - pageY <= 30) return;
if (pageY <= 30) return;
//这里用right和bottom.所以需要将pageX pageY转换
var x = this.data.screenWidth - pageX - 30;
var y = this.data.screenHeight - pageY - 30;
console.log('x: ' + x)
console.log('y: ' + y)
this.setData({
ballBottom: y,
ballRight: x
});
},
//点击事件
ballClickEvent: function () {
console.log('点击了....')
}
})3.index.wxss
.image-style{
position: absolute;
bottom: 240px;
right: 100px;
width: 60px;
height: 60px;
z-index: 100;
}The above is this article The entire content, I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!
Related recommendations:
About the analysis of jump parameters and objects in WeChat Mini ProgramWeChat Mini Program Simple encapsulation of network requestsIntroduction to the encapsulation of the WeChat applet request interfaceThe above is the detailed content of WeChat applet implements drag and drop image touch event monitoring. For more information, please follow other related articles on the PHP Chinese website!
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