方法一（网页上判断）
if
(navigator.userAgent.match(/(iPhone|iPod|iPad);?/i)) {
var
loadDateTime =
new
Date();
window.setTimeout(
function
() {
var
timeOutDateTime =
new
Date();
if
(timeOutDateTime - loadDateTime < 5000) {
window.location =
"要跳转的页面URL"
;
}
else
{
window.close();
}
},
25);
}
else
if
(navigator.userAgent.match(/android/i)) {
var
state =
null
;
try
{
}
catch
(e) {}
if
(state) {
window.close();
}
else
{
window.location =
"要跳转的页面URL"
;
}
}
方法二
function
testApp(url) {
var
timeout, t = 1000, hasApp =
true
;
setTimeout(
function
() {
if
(hasApp) {
alert(
'安装了app'
);
}
else
{
alert(
'未安装app'
);
}
document.body.removeChild(ifr);
}, 2000)
var
t1 = Date.now();
var
ifr = document.createElement(
"iframe"
);
ifr.setAttribute(
'src'
, url);
ifr.setAttribute(
'style'
,
'display:none'
);
document.body.appendChild(ifr);
timeout = setTimeout(
function
() {
var
t2 = Date.now();
if
(!t1 || t2 - t1 < t + 100) {
hasApp =
false
;
}
}, t);
}
方法三（APP里判断）
var
isAndroid = u.indexOf(
'Android'
) > -1 || u.indexOf(
'Linux'
) > -1;
//android终端或者uc浏览器
var
isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
//ios终端
if
(isAndroid){
function
android(){
window.setTimeout(
function
(){
},2000);
};
if
(isiOS){
function
ios(){
var
ifr = document.createElement(
"iframe"
);
ifr.style.display =
"none"
;
document.body.appendChild(ifr);
window.setTimeout(
function
(){
document.body.removeChild(ifr);
},2000)
};
}