一次偶然在網上看到一個隨機線條頁面,看起來狂拽炫酷,今日得空先記錄下來~
隨機線條
廢話不多說,上圖:
如上圖所示,在登陸界面用到了隨機線條作為背景,點擊登陸后跳轉到自定義的404界面。實現方式如下:
方法1:
引入外部Js:
<script src="http://open.sojson.com/common/js/canvas-nest.min.js" count="200" zindex="-2" opacity="0.5" color="47,135,193" type="text/javascript"> </script>
可以直接使用,open.sojson.com是公開sdn域名,sojson工具站提供流量支持,嘻嘻~
溫馨提示:需要將引入的Js放到body里面。
方式二:自己新建js,將js拷貝過去,同樣可以使用,引用方式和上面的一樣
js代碼
! function() { //封裝方法,壓縮之后減少文件大小 function get_attribute(node, attr, default_value) { return node.getAttribute(attr) || default_value; } //封裝方法,壓縮之后減少文件大小 function get_by_tagname(name) { return document.getElementsByTagName(name); } //獲取配置參數 function get_config_option() { var scripts = get_by_tagname("script"), script_len = scripts.length, script = scripts[script_len - 1]; //當前加載的script return { l: script_len, //長度,用於生成id用 z: get_attribute(script, "zIndex", -1), //層級 o: get_attribute(script, "opacity", 0.5), //透明度 c: get_attribute(script, "color", "0,0,0"), //線條顏色,最好使用RGB顏色 n: get_attribute(script, "count", 99) //線條數量 }; } //設置canvas的高寬 function set_canvas_size() { canvas_width = the_canvas.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth, canvas_height = the_canvas.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight; } //繪制過程 function draw_canvas() { context.clearRect(0, 0, canvas_width, canvas_height); //隨機的線條和當前位置聯合數組 var all_array = [current_point].concat(random_lines); var e, i, d, x_dist, y_dist, dist; //臨時節點 //遍歷處理每一個點 random_lines.forEach(function(r) { r.x += r.xa, r.y += r.ya, //移動 r.xa *= r.x > canvas_width || r.x < 0 ? -1 : 1, r.ya *= r.y > canvas_height || r.y < 0 ? -1 : 1, //碰到邊界,反向反彈 context.fillRect(r.x - 0.5, r.y - 0.5, 1, 1); //繪制一個寬高為1的點 for (i = 0; i < all_array.length; i++) { e = all_array[i]; //不是當前點 if (r !== e && null !== e.x && null !== e.y) { x_dist = r.x - e.x, //x軸距離 l y_dist = r.y - e.y, //y軸距離 n dist = x_dist * x_dist + y_dist * y_dist; //總距離, m dist < e.max && (e === current_point && dist >= e.max / 2 && (r.x -= 0.03 * x_dist, r.y -= 0.03 * y_dist), //靠近的時候加速 d = (e.max - dist) / e.max, context.beginPath(), context.lineWidth = d / 2, context.strokeStyle = "rgba(" + config.c + "," + (d + 0.2) + ")", context.moveTo(r.x, r.y), context.lineTo(e.x, e.y), context.stroke()); } } all_array.splice(all_array.indexOf(r), 1); }), frame_func(draw_canvas); } //創建畫布,並添加到body中 var the_canvas = document.createElement("canvas"), //畫布 config = get_config_option(), //配置 canvas_id = "c_n" + config.l, //canvas id context = the_canvas.getContext("2d"), canvas_width, canvas_height, frame_func = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(func) { window.setTimeout(func, 1000 / 45); }, random = Math.random, current_point = { x: null, //當前鼠標x y: null, //當前鼠標y max: 20000 }; the_canvas.id = canvas_id; the_canvas.style.cssText = "position:fixed;top:0;left:0;z-index:" + config.z + ";opacity:" + config.o; get_by_tagname("body")[0].appendChild(the_canvas); //初始化畫布大小 set_canvas_size(), window.onresize = set_canvas_size; //當時鼠標位置存儲,離開的時候,釋放當前位置信息 window.onmousemove = function(e) { e = e || window.event, current_point.x = e.clientX, current_point.y = e.clientY; }, window.onmouseout = function() { current_point.x = null, current_point.y = null; }; //隨機生成config.n條線位置信息 for (var random_lines = [], i = 0; config.n > i; i++) { var x = random() * canvas_width, //隨機位置 y = random() * canvas_height, xa = 2 * random() - 1, //隨機運動方向 ya = 2 * random() - 1; random_lines.push({ x: x, y: y, xa: xa, ya: ya, max: 6000 //沾附距離 }); } //0.1秒后繪制 setTimeout(function() { draw_canvas(); }, 100); }();
加載頁面
New Add2016.12.22
我的博客------ 首頁加載界面實現方式(采用HTML+CSS)
HTML代碼
<div class="loading"> <img src="http://images.cnblogs.com/cnblogs_com/zhangxiaoyong/770736/o_zoro.gif" /> <span>永不停歇,向上人生路!</span> </div>
CSS代碼:
.loading { position: fixed; top: 0; z-index: 999; height: 100%; width: 100%; text-align: center; background: #ffffff; font-size: 18px; visibility: hidden; opacity: 0; -webkit-animation: loading 3s linear; /**此處是3秒消失,可根據自行需要調整時間**/ } .loading img { margin-top: 100px; } @-webkit-keyframes loading { 0%{opacity: 1;visibility: visible;} 90%{opacity: 1;} 100%{opacity: 0;visibility: visible;} }
加載效果