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這個問題segmentfault上有. IOS 網(wǎng)頁能判斷有沒有安裝應(yīng)用
很久沒去看了. 試試:

<script language="javascript">  
 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 = "要跳轉(zhuǎn)的頁面URL";  
   } else {  
    window.close();  
   }  
  },  
  25);  
  window.location = " apps custom url schemes ";  
 } else if (navigator.userAgent.match(/android/i)) {  
  var state = null;  
  try {  
   state = window.open("apps custom url schemes ", '_blank');  
  } catch(e) {}  
  if (state) {  
   window.close();  
  } else {  
   window.location = "要跳轉(zhuǎn)的頁面URL";  
  }  
 }  
</script>