浏览器中唤醒App

转载自从浏览器或者Webview 中唤醒APP
参考h5唤起app

function openApp(openUrl, callback) {
//检查app是否打开
function checkOpen(cb){
var _clickTime = +(new Date());
function check(elsTime) {
if ( elsTime > 3000 || document.hidden || document.webkitHidden) {
                cb(1);
            } else {
                cb(0);
            }
        }
//启动间隔20ms运行的定时器，并检测累计消耗时间是否超过3000ms，超过则结束
var _count = 0, intHandle;
        intHandle = setInterval(function(){
            _count++;        
var elsTime = +(new Date()) - _clickTime;
if (_count>=100 || elsTime > 3000 ) {
                clearInterval(intHandle);
                check(elsTime);
            }
        }, 20);
    }

//在iframe 中打开APP
var ifr = document.createElement('iframe');
    ifr.src = openUrl;
    ifr.style.display = 'none';
if (callback) {
        checkOpen(function(opened){
            callback && callback(opened);
        });
    }

    document.body.appendChild(ifr);      
    setTimeout(function() {
        document.body.removeChild(ifr);
    }, 2000);  
}