本文实例为大家分享了小程序实现选择题的显示方法，供大家参考，具体内容如下
下面是三张效果图：初始图，选项正确图，选项错误图。
wxml代码：
<view class='selection'>
<view class='{{view1}}' bindtap='view1Click' id='1'>a</view>
<view class='{{view2}}' bindtap='view2Click' id='2'>b</view>
<view class='{{view3}}' bindtap='view3Click' id='3'>c</view>
<view class='{{view4}}' bindtap='view4Click' id='4'>d</view>
</view>
js代码：
Page({
/**
* 页面的初始数据
*/
data: {
view1: 'selection1',
view2: 'selection1',
view3: 'selection1',
view4: 'selection1',
// 默认答案为2，后台会给的
key: 2,
// 选项是否被点击
isSelect: false
},
view1Click: function(e) {
var select = e.target.id
// 选项没被选择时将执行
if (!this.data.isSelect) {
// 将选项设置为“已被选择”
this.setData({
isSelect: true
})
// 注意！此处必须是'=='而不是'='
if (select == this.data.key) {
this.setData({
view1: 'selection2'
})
} else {
this.setData({
view1: 'selection3'
})
// 将正确选项显示出来
this.showAnswer(this.data.key)
}
}
},
view2Click: function(e) {
var select = e.target.id
// 选项没被选择时将执行
if (!this.data.isSelect) {
this.setData({
isSelect: true
})
// 注意！此处必须是'=='而不是'='
if (select == this.data.key) {
this.setData({
view2: 'selection2'
})
} else {
this.setData({
view2: 'selection3'
})
// 将正确选项显示出来
this.showAnswer(this.data.key)
}
}
},
view3Click: function(e) {
var select = e.target.id
// 选项没被选择时将执行
if (!this.data.isSelect) {
this.setData({
isSelect: true
})
// 注意！此处必须是'=='而不是'='
if (select == this.data.key) {
this.setData({
view3: 'selection2'
})
} else {
this.setData({
view3: 'selection3'
})
// 将正确选项显示出来
this.showAnswer(this.data.key)
}
}
},
view4Click: function(e) {
var select = e.target.id
// 选项没被选择时将执行
if (!this.data.isSelect) {
this.setData({
isSelect: true
})
// 注意！此处必须是'=='而不是'='
if (select == this.data.key) {
this.setData({
view4: 'selection2'
})
} else {
this.setData({
view4: 'selection3'
})
// 将正确选项显示出来
this.showAnswer(this.data.key)
}
}
},
showAnswer: function(key) {
// 通过swith语句判断正确答案，从而显示正确选项
switch (key) {
case 1:
this.setData({
view1: 'selection2'
})
break;
case 2:
this.setData({
view2: 'selection2'
})
break;
case 3:
this.setData({
view3: 'selection2'
})
break;
default:
this.setData({
view4: 'selection2'
})
}
}
})
wxss代码：
.selection1{
width: 400rpx;
height: 150rpx;
background-color: grey;
display: flex;
flex-direction: column;
justify-content: space-around;
align-items: center;
}
.selection2{
width: 400rpx;
height: 150rpx;
background-color: blue;
display: flex;
flex-direction: column;
justify-content: space-around;
align-items: center;
}
.selection3{
width: 400rpx;
height: 150rpx;
background-color: red;
display: flex;
flex-direction: column;
justify-content: space-around;
align-items: center;
}
.selection{
width: 750rpx;
height: 800rpx;
display: flex;
flex-direction: column;
justify-content: space-around;
align-items: center;
}
