这期内容当中小编将会给大家带来有关小程序实现左右来回滚动字幕效果，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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wxml:
弹幕
发射
{{item.barrage_shootText}}
wxss:
/* pages/market/market.wxss */
.slide-image{
width: 100%;
}
/* 弹幕选择按钮的操作*/
.barrage-Switch{
position: absolute;
bottom: 10px;
right: 10px;
z-index: 2;
}
/* 弹幕输入框的操作*/
.barrage-inputText{
position: absolute;
display: flex;
background-color: #BFBFBF;
width: 100%;
height: 40px;
flex-direction: row;
nav-index: 2;
justify-content: center;
align-items: center;
bottom: 10%;
}
.barrage-input{
background-color: greenyellow;
width: 60%;
height: 30px;
}
.barrage-shoot{
margin-left: 10px;
width: 25%;
height: 30px;
}
.shoot{
width: 100%;
color: black;
}
/*弹幕飞飞飞*/
.barrage-fly{
z-index: 3;
height: 80%;
width: 100%;
position: absolute;
top: 0;
}
.barrage-textFly{
position: absolute;
}market.js
// pages/market/market.js
var barrage_style_arr = [];
var barrage_style_obj = {};
var phoneWidth = 0;
var timers = [];
var timer;
Page({
data: {
imgUrls: [
'http://img02.tooopen.com/images/20150928/tooopen_sy_143912755726.jpg',
'http://img06.tooopen.com/images/20160818/tooopen_sy_175866434296.jpg',
'http://img06.tooopen.com/images/20160818/tooopen_sy_175833047715.jpg'
],
indicatorDots: true,
autoplay: true,
interval: 3000,
duration: 500,
barrageTextColor: "#D3D3D3",
barrage_inputText: "none",
barrage_shoottextColor: "black",
bind_shootValue: "",
barrage_style: [],
barragefly_display: "none",
},
// 生命周期函数--监听页面加载
onLoad: function (options) {
var that = this;
//获取屏幕的宽度
wx.getSystemInfo({
success: function (res) {
that.setData({
barrage_phoneWidth: res.windowWidth - 100,
})
}
})
phoneWidth = that.data.barrage_phoneWidth;
console.log(phoneWidth);
},
//是否打开弹幕...
barrageSwitch: function (e) {
console.log(e);
//先判断没有打开
if (!e.detail.value) {
//清空弹幕
barrage_style_arr = [];
//设置data的值
this.setData({
barrageTextColor: "#D3D3D3",
barrage_inputText: "none",
barragefly_display: "none",
barrage_style: barrage_style_arr,
});
//清除定时器
clearInterval(timer);
} else {
this.setData({
barrageTextColor: "#04BE02",
barrage_inputText: "flex",
barragefly_display: "block",
});
//打开定时器
timer = setInterval(this.barrageText_move, 800)
}
},
//发射按钮
shoot: function (e) {
//字体颜色随机
var textColor = "rgb(" + parseInt(Math.random() * 256) + "," + parseInt(Math.random() * 256) + "," + parseInt(Math.random() * 256) + ")";
// //设置弹幕字体的水平位置样式
// var textWidth = -(this.data.bind_shootValue.length*0);
//设置弹幕字体的垂直位置样式
var barrageText_height = (Math.random()) * 266;
barrage_style_obj = {
// textWidth:textWidth,
barrageText_height: barrageText_height,
barrage_shootText: this.data.bind_shootValue,
barrage_shoottextColor: textColor,
barrage_phoneWidth: phoneWidth
};
barrage_style_arr.push(barrage_style_obj);
this.setData({
barrage_style: barrage_style_arr, //发送弹幕
bind_shootValue: "" //清空输入框
})
//定时器 让弹幕动起来
// this.timer= setInterval(this.barrageText_move,800);
},
//定时器 让弹幕动起来
barrageText_move: function () {
var timerNum = barrage_style_arr.length;
var textMove;
for (var i = 0; i < timerNum; i++) {
textMove = barrage_style_arr[i].barrage_phoneWidth;
console.log("barrage_style_arr[" + i + "].barrage_phoneWidth----------:" + barrage_style_arr[i].barrage_phoneWidth);
textMove = textMove - 20;
barrage_style_arr[i].barrage_phoneWidth = textMove;
//走完的移除掉
if (textMove <= -100) {
// clearTimeout(this.timer);
barrage_style_arr.splice(0, 1);
i--;
//全部弹幕运行完
if (barrage_style_arr.length == 0) {
this.setData({
barrage_style: barrage_style_arr,
})
// clearInterval(this.timer);
return;
}
}
console.log("第" + i + "个定时器:", textMove);
this.setData({
barrage_style: barrage_style_arr,
})
}
},
//绑定发射输入框，将值传递给data里的bind_shootValue，发射的时候调用
bind_shoot: function (e) {
this.setData({
bind_shootValue: e.detail.value
})
},
})上述就是小编为大家分享的小程序实现左右来回滚动字幕效果了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。
标题名称：小程序实现左右来回滚动字幕效果
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