关于Vue实现拖动滑块验证功能的步骤,我将详细讲解以下攻略。
1. 创建Vue项目
使用Vue CLI来创建Vue项目。在命令行中输入以下命令:
vue create drag-slider
然后按照提示选择使用default preset和保存路径。等待安装完毕后,进入项目目录:
cd drag-slider
2. 引入样式
此处我们需引入一个滑块的CSS文件。在public
文件夹下创建一个名为drag.css
的文件,在其中添加以下代码:
.slider-container {
position: relative;
width: 400px;
height: 40px;
margin: 50px auto;
}
.slider {
position: absolute;
top: 0;
left: 0;
width: 40px;
height: 40px;
background-color: teal;
border-radius: 40px;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.26);
cursor: pointer;
}
.slider.active {
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}
.slide-bar {
width: 360px;
height: 4px;
background-color: #999999;
position: absolute;
top: 18px;
left: 20px;
}
3. 创建组件
在src/components
文件夹下,创建一个名为DragSlider.vue
的组件文件,然后在其中添加以下代码:
<template>
<div class="slider-container">
<div
class="slider"
:class="isActive ? 'active' : ''"
@mousedown="startDrag"
@mouseup="stopDrag"
@mousemove="drag"
@mouseleave="stopDrag"
:style="{ left: sliderLeft }"
ref="slider"
></div>
<div class="slide-bar"></div>
</div>
</template>
<script>
export default {
data() {
return {
isDragging: false,
dragStart: 0,
sliderLeft: 0,
maxSliderLeft: 360,
isActive: false,
};
},
methods: {
startDrag(e) {
this.isDragging = true;
this.dragStart = e.clientX;
},
stopDrag() {
if (this.isDragging && this.sliderLeft + 40 >= this.maxSliderLeft) {
this.isActive = true;
}
this.isDragging = false;
this.dragStart = 0;
},
drag(e) {
if (this.isDragging) {
let dragDistance = e.clientX - this.dragStart;
let newSliderLeft = this.sliderLeft + dragDistance;
if (newSliderLeft < 0) {
newSliderLeft = 0;
} else if (newSliderLeft + 40 > this.maxSliderLeft) {
newSliderLeft = this.maxSliderLeft - 40;
}
this.sliderLeft = newSliderLeft;
this.dragStart = e.clientX;
}
},
},
};
</script>
<style src="./drag.css"></style>
4. 使用组件
在App.vue
组件中使用刚才创建的DragSlider
组件。在template
中添加以下代码:
<template>
<div id="app">
<DragSlider />
</div>
</template>
DragSlider
组件会生效,可以通过鼠标左键按住滑块并拖动到最右端来激活isActive
属性。如果成功激活,那么滑块就会变为绿色。
以上就是使用Vue实现拖动滑块验证功能的完整攻略。接下来,我为你提供两条示例说明。
示例1:使用Axios向后台验证
让我们添加一些验证,在滑块被拖动到极端右侧后,向一个API端点发送POST请求,并且在成功响应时设置isActive
为true。
首先安装axios
:
npm i axios
在DragSlider
组件中添加以下代码:
<template>
<div class="slider-container">
<div
class="slider"
:class="isActive ? 'active' : ''"
@mousedown="startDrag"
@mouseup="stopDrag"
@mousemove="drag"
@mouseleave="stopDrag"
:style="{ left: sliderLeft }"
ref="slider"
></div>
<div class="slide-bar"></div>
</div>
</template>
<script>
import axios from "axios";
export default {
data() {
return {
isDragging: false,
dragStart: 0,
sliderLeft: 0,
maxSliderLeft: 360,
isActive: false,
};
},
methods: {
startDrag(e) {
this.isDragging = true;
this.dragStart = e.clientX;
},
stopDrag() {
if (this.isDragging && this.sliderLeft + 40 >= this.maxSliderLeft) {
axios.post("/api/validate").then((response) => {
if (response.data.status === "success") {
this.isActive = true;
}
});
}
this.isDragging = false;
this.dragStart = 0;
},
drag(e) {
if (this.isDragging) {
let dragDistance = e.clientX - this.dragStart;
let newSliderLeft = this.sliderLeft + dragDistance;
if (newSliderLeft < 0) {
newSliderLeft = 0;
} else if (newSliderLeft + 40 > this.maxSliderLeft) {
newSliderLeft = this.maxSliderLeft - 40;
}
this.sliderLeft = newSliderLeft;
this.dragStart = e.clientX;
}
},
},
};
</script>
<style src="./drag.css"></style>
这里我们向/api/validate
发送POST请求,并检查响应的status
属性来判断是否验证成功。
示例2:使用Vuex管理状态
为了演示如何使用Vuex来管理状态,我们将我们原来的DragSlider
组件改为如下:
<template>
<div class="slider-container">
<div
class="slider"
:class="isActive ? 'active' : ''"
@mousedown="startDrag"
@mouseup="stopDrag"
@mousemove="drag"
@mouseleave="stopDrag"
:style="{ left: sliderLeft }"
ref="slider"
></div>
<div class="slide-bar"></div>
</div>
</template>
<script>
import { mapState, mapMutations } from "vuex";
export default {
computed: mapState(["isActive"]),
methods: {
...mapMutations(["setActive"]),
startDrag(e) {
this.isDragging = true;
this.dragStart = e.clientX;
},
stopDrag() {
if (this.isDragging && this.sliderLeft + 40 >= this.maxSliderLeft) {
this.$store.commit("setActive", true);
}
this.isDragging = false;
this.dragStart = 0;
},
drag(e) {
if (this.isDragging) {
let dragDistance = e.clientX - this.dragStart;
let newSliderLeft = this.sliderLeft + dragDistance;
if (newSliderLeft < 0) {
newSliderLeft = 0;
} else if (newSliderLeft + 40 > this.maxSliderLeft) {
newSliderLeft = this.maxSliderLeft - 40;
}
this.sliderLeft = newSliderLeft;
this.dragStart = e.clientX;
}
},
},
data() {
return {
isDragging: false,
dragStart: 0,
sliderLeft: 0,
maxSliderLeft: 360,
};
},
};
</script>
<style src="./drag.css"></style>
然后在App.vue
中添加以下代码:
<template>
<div id="app">
<DragSlider />
<p v-if="isActive">验证成功!</p>
</div>
</template>
<script>
import { mapState } from "vuex";
export default {
computed: mapState(["isActive"]),
};
</script>
在这里,我们在渲染函数中使用了Vuex的mapState
函数来显示验证的状态。isActive
存储在Vuex的状态中,并可通过setActive
mutation来设置。
以上就是使用Vue实现拖动滑块验证功能的完整攻略以及两条示例说明。
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