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h5曲线滑动确认

高洛峰

Nov 01, 2016 pm 03:54 PM

csshtmljavascript

h5项目需根据几条弯曲的线条让用户进行曲线式滑动，滑动时需实时响应某些样式，于是就有了下面这个实例。（可自定义多个子对象大小分别放在线条各处，以增加曲线滑动确认精度。）

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>手机端触屏手指曲线滑动确认</title>
<meta content="width=device-width,initial-scale=1.0,minimum-scale=1.0,user-scalable=no,maximum-scale=1.0" id="viewport" name="viewport">
<script type="text/javascript">
var touch_screen = {
    //曲线滑动确认
    curve_confirm: {
        _object: null,
        _object_children_length: null,
        _object_children:null,
        _is_start: false,
        _fn: function() {},
        start: function() {
            var self = this;
            //开始滑动
            var start = function(e) {
                self._is_start = true;
                for (var i = 0, j = self._object_children_length; i < j; i++) {
                    var sub_object = self._object_children[i];
                    sub_object.setAttribute("alt", "");
                    sub_object.style.background = "";
                }
            }
            //滑动中
            var move = function(e) {
                e.preventDefault();
                var obj = self._object;
                if (self._is_start) {
                    var x = e.targetTouches[0].pageX;
                    var y = e.targetTouches[0].pageY;
                    for (var i = 0; i < self._object_children_length * 2; i++) {
                        var _o = obj.childNodes[i],
                            _w = _o.offsetWidth,
                            _h = _o.offsetHeight;
                        _left = _o.offsetLeft, _top = _o.offsetTop;
                        if (x >= _left && x < (_left + _w) && y > _top && y < (_top + _h)) {
                            var sub_object = obj.childNodes[i];
                            sub_object.setAttribute("alt", "yes");
                            sub_object.style.background = "#f00";
                        }
                    }
                }
            }
            //滑动结束时
            var end = function(e) {
                self._is_start = false;
                var n = 0;
                for (var i = 0, j = self._object_children_length; i < j; i++) {
                    var sub_object = self._object_children[i];
                    if (sub_object.getAttribute("alt") == "yes") {
                        n++;
                    }
                }
                if (n == self._object_children_length) {
                    n = 0;
                    if (typeof self._fn == "function") {
                        self._fn();
                    }
                }
            }
            
            document.addEventListener("touchstart", start, false);
            document.addEventListener("touchmove", move, false);
            document.addEventListener("touchend", end, false);
        },
        //初始化
        init: function(o, fn) {
            var class_clone = function(source) {
                var result = {};
                for (var key in source) {
                    result[key] = typeof source[key] === "object" ? class_clone(source[key]) : source[key];
                }
                return result;
            }
            var self = class_clone(touch_screen.curve_confirm);
            self._object = document.getElementById(o);
            self._object_children = self._object.getElementsByTagName("div");
            self._object_children_length = self._object_children.length;
            self._fn = fn;
            if (!self._object) {
                alert(&#39;bind_object is not an object&#39;);
                return false;
            }
            self.start();
        }
    }
}

//页面加载完成
window.onload = function() {
    touch_screen.curve_confirm.init("curve_item", function() {
        alert("曲线已匹配！");
    });
}
</script>

<style type="text/css">
html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
}
#curve_item div {
    background: #0F6;
    position:absolute;
    width:50px;
    height:50px;
}
#curve_item #a { top:20px; left:20px; }
#curve_item #b { top:100px; left:100px; }
#curve_item #c { top:200px; left:200px; }
#curve_item #d { top:300px; left:100px; }
#curve_item #e { top:400px; left:20px; }
</style>
</head>

<body>
<div id="curve_item">
  <div id="a"></div>
  <div id="b"></div>
  <div id="c"></div>
  <div id="d"></div>
  <div id="e"></div>
</div>
</body>
</html>

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