在調整大小時不會重新計算添加位置

Question

我想在滾動時添加我的導航欄，即使在調整窗口大小時它也會達到頂部。

即使我將其設置爲重新計算值時，觸發的位置也不會更新，因爲我在$(window).resize()。怎麼了？

$(document).ready -> 
    $(window).resize -> 

    windowHeight = $(window).height() 
    navHeight = $('#navbar-affixable-wrapper > #navbar.affixable').outerHeight() 
    windowMinusNavHeight = windowHeight - navHeight 

    $('#navbar-affixable-wrapper > #navbar.affixable').affix 
     offset: { top: windowMinusNavHeight } 

或者在javascript：

$(document).ready(function() { 
    return $(window).resize(function() { 
    var navHeight, windowHeight, windowMinusNavHeight; 
    windowHeight = $(window).height(); 
    navHeight = $('#navbar-affixable-wrapper > #navbar.affixable').outerHeight(); 
    windowMinusNavHeight = windowHeight - navHeight; 

    return $('#navbar-affixable-wrapper > #navbar.affixable').affix({ 
     offset: { 
     top: windowMinusNavHeight 
     } 
    }); 
    }); 
}); 

Answer 1

可以返回偏移最高值的函數嗎？

例如：

$(function(){ 

    var $window = $(window); 
    var $navbar = $('#navbar-affixable-wrapper > #navbar.affixable'); 

    $navbar.affix({ 
     offset: { 
     top: function(){ 
      // Calculate offset top value 
      return $window.height() - $navbar.outerHeight(true); // I always pass true in there so margin is taken into consideration. 
     } 
     } 
    }) 
}); 

可以檢出引導網站上的affix documentation。