HTML5 Mobile Web Making notes

Recently on the Android mobile Web page, the first time to start. Make a note of the relevant things to be used.

First, Http://www.ruanyifeng.com/blog/2012/05/responsive_web_design.html introduced as follows

Second, allow Web page width automatic adjustment

How does "adaptive Web Design" work? It's not that hard actually.

First, in the header of the page code, add a row of viewport meta tags.

<meta name= "viewport" content= "width=device-width, initial-scale=1"/>

Viewport is the default width and height of the page, which means that the page width defaults to the screen width (width=device-width), the original scale (initial-scale=1) is 1.0, that is, the initial size of the page occupies 100% of the screen area.

This setting is supported by all major browsers, including IE9. For those older browsers (mostly IE6, 7, 8), you need to use Css3-mediaqueries.js.

<!--[If Lt IE 9]>
<script src= "Http://css3-mediaqueries-js.googlecode.com/svn/trunk/css3-mediaqueries.js" ></script>
<! [endif]-->

Three, do not use absolute width

Because the page adjusts the layout based on the width of the screen, you cannot use an absolute width layout or an element with an absolute width. This is a very important article.

Specifically, CSS code cannot specify pixel widths:

width:xxx px;

Only percent widths can be specified:

width:xx%;

Or

Width:auto;

Four, the relative size of the font

The font also cannot use absolute size (px), but only relative size (EM).

Body {
Font:normal 100% Helvetica, Arial, Sans-serif;
}

The above code specifies that the font size is 100% of the default size of the page, which is 16 pixels.

H1 {
Font-size:1.5em;
}

Then, the size of the H1 is 1.5 times times the default size, which is 24 pixels (24/16=1.5).

Small {
Font-size:0.875em;
}

The size of the small element is 0.875 times times the default size, which is 14 pixels (14/16=0.875).

V. Flow layout (fluid grid)

The meaning of "flow layout" is that the positions of each block are floating, not fixed.

. Main {
Float:right;
width:70%;
}

. leftbar {
Float:left;
width:25%;
}

The advantage of float is that if the width is too small to fit two elements, the following elements will automatically scroll to the bottom of the preceding element without overflow (overflow) horizontally, avoiding the appearance of the horizontal scroll bar.

In addition, the use of absolute positioning (Position:absolute) should also be very careful.

Vi. Choosing to load CSS

The core of "adaptive web Design" is the media query module introduced by CSS3.

It means that the screen width is automatically detected and then the corresponding CSS file is loaded.

<link rel= "stylesheet" type= "Text/css"
Media= "screen and (max-device-width:400px)"
href= "Tinyscreen.css"/>

The code above means that if the screen width is less than 400 pixels (max-device-width:400px), the Tinyscreen.css file is loaded.

<link rel= "stylesheet" type= "Text/css"
Media= "screen and (min-width:400px) and (max-device-width:600px)"
href= "Smallscreen.css"/>

If the screen width is between 400 pixels to 600 pixels, the Smallscreen.css file is loaded.

In addition to loading CSS files with HTML tags, you can also load them in an existing CSS file.

@import url ("tinyscreen.css") screen and (max-device-width:400px);

Vii. @media rules for CSS

The same CSS file, you can also choose to apply different CSS rules depending on the screen resolution.

@media screen and (max-device-width:400px) {

. column {
Float:none;
Width:auto;
}

#sidebar {
Display:none;
}

}

The above code means that if the screen width is less than 400 pixels, the column block is de-floating (float:none), Width auto-adjusting (Width:auto), and the sidebar block is not displayed (Display:none).

Eight, the image of the adaptive (fluid image)

In addition to layout and text, adaptive web design must also implement automatic scaling of pictures.

This is just one line of CSS code:

img {max-width:100%;}

This line of code is also valid for most video embedded pages, so it can be written as:

IMG, object {max-width:100%;}

The old version of IE does not support max-width, so it has to be written:

img {width:100%;}

Additionally, image distortion may occur when the Windows platform scales pictures. At this point, you can try to use IE's proprietary commands:

img {-ms-interpolation-mode:bicubic;}

Or, Ethan Marcotte's imgsizer.js.

Addloadevent (function () {

var IMGs = document.getElementById ("content"). getElementsByTagName ("img");

Imgsizer.collate (IMGs);

});

However, if there is a condition, it is best to load different resolution images depending on the screen of different sizes. There are many ways to do this, both server side and client can implement.

Reading the above is very helpful to me and try it myself. To the upper out of the slowly after the sense of accomplishment;

But the problem is that Web debugging is a big problem for mobile phones. Finally I was using the real machine test, using IP to access the local HTML file (do not know how to debug the latest version of Google Chrome can be used in the simulation debugging, basically can meet the majority of the different size of the phone screen).

About touch swipe, start using the zopto.js results found to be a big hole, decisively give up. Finally find a personal think good, basic meet the function of the plug-in, recommended to everyone.

1, a relatively lightweight plug-in, is also very simple, functional is also very practical size only 1.2K.
This plug-in event is much less than the plugin of the previous article, only a simple swipe up and down, but basically this is the few special effects, and the plugin is very small, very suitable for the site.
Here is the official demo:

$ ("#imagegallery"). Touchwipe ({wipeleft:function () {alert ("left"),},wiperight:function () {alert ("right"),},wipeup : function () {alert ("Up"),},wipedown:function () {alert ("Down"),},min_move_x:20,min_move_y:20,preventdefaultevents : true});

　　

How about, it's simple:
Wipeleft: Swipe left
Wiperight: Swipe Right
Wipeup: Test the following. It looks like it's slipping from the top down. The problem with my cell phone.
Wipedown: This looks like it's slipping from the bottom up. If someone is not the same, reply to the following.
min_move_x: Minimum sliding x-axis distance.
Min_move_y: Minimum sliding y-axis distance.
When Preventdefaultevents:preventdefault is set to True, the default events of the swipe gesture (such as page scrolling) are masked and only wipeleft: ... wiperight:

Official Download URL:

Http://www.netcu.de/jquery-touchwipe-iphone-ipad-library

2. A plug-in with very powerful features

Swiper

Official website:

Http://www.idangero.us/swiper/get-started/#.VZyRjPmqpBc

There are APIs and demo please go

HTML5 Mobile Web Making notes