Python学习---抽屉框架分析[点赞功能分析]

实际上就是多了一个隐藏的span标签，内容是+1,配合setInterval实现的动态效果

settings.py

INSTALLED_APPS = [
   ...
 'app01',   # 注册app
]
STATICFILES_DIRS = (os.path.join(BASE_DIR, "statics"),)  # 现添加的配置,这里是元组，注意逗号
TEMPLATES = [
   ...
   'DIRS': [os.path.join(BASE_DIR, 'templates')],
]

urls.py

from django.contrib import admin
from django.urls import path
from django.conf.urls import url, include
from app01 import views
urlpatterns = [
   # 点赞效果实现
 url(r'^zan.html', views.zan),
]

views.py

from django.shortcuts import render, redirect
from app01 import models
# 点赞效果实现
def zan(request):
    return render(request, 'zan.html')

views.py

from django.shortcuts import render, redirect
from app01 import models
# 点赞效果实现
def zan(request):
    return render(request, 'zan.html')

templates/zan.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <style>
        div{
            height:100px;
            border:1px solid red;
        }
        .zan {
            height: 35px;
            width: 35px;
            color: black;
            background-color: #ff9dd5;
            position: relative;
            cursor: pointer;
            z-index: 1000;
        }
        .zan span {
            position: absolute;
        }
    </style>
</head>
<body>
    <div class="div1">
        <h3 style="color: #3e40cd">手动设置的+1效果</h3>
        <div class="zan">赞
            <span>+1</span>
        </div>
    </div>
    <div class="div2">
        <h3 style="color: #3e40cd">点击触发的+1效果</h3>
        <div class="zan">赞</div>
    </div>
</body>
<script src="/static/jquery-2.1.4.min.js"></script>
<script>
    // 动态实现+1的效果
    $(function(){
        $(".div2").click(function () {
            var tag_left = 5;
            var tag_top =5;
            var tag_opacity = 1;   // 半透明状况
            var tag_font_size = 12;

            var tag = document.createElement('span');
            tag.innerHTML = "+1";
            tag.style.color = 'green';
            tag.style.fontSize = tag_font_size + 'px';
            tag.style.top = tag_top + 'px';
            tag.style.opacity = tag_opacity;
            tag.style.left = tag_left + 'px';
            $(".div2 .zan").append(tag);
            var obj = setInterval(function () {
                tag_left += 2;
                tag_top -= 2;
                tag_opacity -= 0.1;   // 半透明状况
                tag_font_size += 1;
                tag.style.fontSize = tag_font_size + 'px';
                tag.style.top = tag_top + 'px';
                tag.style.opacity = tag_opacity;
                // tag.style.position = 'absolute';
                tag.style.zIndex = 1002;
                tag.style.left = tag_left + 'px';
                if(tag_opacity<0){
                    clearInterval(obj);
                    tag.remove();
                }
            }, 100)
        })
    })
</script>
</html>

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