需要做个浮在scroll-view之上的button.尝试了一下.
上GIF：
Android中也会有类似移动控件的操作.思路差不多.获取到位移的X Y 的变量,给控件设置坐标.
1.index.wxml
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- <image class="image-style" src="../../images/gundong.png" bindtap="ballClickEvent" style="bottom:{{ballBottom}}px;right:{{ballRight}}px;" bindtouchmove="ballMoveEvent">
- </image>
简单的设置一张图片,添加触摸事件监听.点击事件监听.根据触摸事件获取X Y位移,设置为image的位置
2.index.js
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//index.js
//获取应用实例
var app = getApp()
Page({
data: {
ballBottom: 240,
ballRight: 120,
screenHeight: 0,
screenWidth: 0,
},
onLoad: function () {
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<span style="white-space:pre"> </span>//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)
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//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;
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//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
});
},
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//点击事件
ballClickEvent: function () {
console.log('点击了....')
}
})
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3.index.wxss
这里需要设置z-index
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.image-style{
position: absolute;
bottom: 240px;
right: 100px;
width: 60px;
height: 60px;
z-index: 100;
}
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