Timothy Bowers on "Menu Not Showing on Mobile - 2012 theme"

Hey there,

Looking at the code it disables for screens smaller than 600px, the iPhone being one of those.

You'll not that it's enabled for:

@media screen and (min-width: 600px)

So we could reverse that like:

@media screen and (max-width: 600px) {

	.main-navigation ul.nav-menu,
	.main-navigation div.nav-menu > ul {
		border-bottom: 1px solid #ededed;
		border-top: 1px solid #ededed;
		display: inline-block !important;
		text-align: left;
		width: 100%;
	}
	.main-navigation ul {
		margin: 0;
		text-indent: 0;
	}
	.main-navigation li a,
	.main-navigation li {
		display: inline-block;
		text-decoration: none;
	}
	.main-navigation li a {
		border-bottom: 0;
		color: #6a6a6a;
		line-height: 3.692307692;
		text-transform: uppercase;
		white-space: nowrap;
	}
	.main-navigation li a:hover,
	.main-navigation li a:focus {
		color: #000;
	}
	.main-navigation li {
		margin: 0 40px 0 0;
		margin: 0 2.857142857rem 0 0;
		position: relative;
	}
	.main-navigation li ul {
		margin: 0;
		padding: 0;
		position: absolute;
		top: 100%;
		z-index: 1;
		height: 1px;
		width: 1px;
		overflow: hidden;
		clip: rect(1px, 1px, 1px, 1px);
	}
	.main-navigation li ul ul {
		top: 0;
		left: 100%;
	}
	.main-navigation ul li:hover > ul,
	.main-navigation ul li:focus > ul,
	.main-navigation .focus > ul {
		border-left: 0;
		clip: inherit;
		overflow: inherit;
		height: inherit;
		width: inherit;
	}
	.main-navigation li ul li a {
		background: #efefef;
		border-bottom: 1px solid #ededed;
		display: block;
		font-size: 11px;
		font-size: 0.785714286rem;
		line-height: 2.181818182;
		padding: 8px 10px;
		padding: 0.571428571rem 0.714285714rem;
		width: 180px;
		width: 12.85714286rem;
		white-space: normal;
	}
	.main-navigation li ul li a:hover,
	.main-navigation li ul li a:focus {
		background: #e3e3e3;
		color: #444;
	}
	.main-navigation .current-menu-item > a,
	.main-navigation .current-menu-ancestor > a,
	.main-navigation .current_page_item > a,
	.main-navigation .current_page_ancestor > a {
		color: #636363;
		font-weight: bold;
	}
}

You'll need to test this to see how responsive and well it will work on devices smaller than 600px.

Another option would be using Jetpack, that has a mobile theme included in there which is pretty sweet:

http://wordpress.org/plugins/jetpack/

Hope this helps.

Take care.