June 2014
Intermediate to advanced
488 pages
9h 56m
Chinese
Content preview from MOBILE HTML5學習手冊
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CSS3：變形、漸變與動畫
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圖 10-2 設成預設值的原點，與設成左上角的原點，會產生不同的變形效果。本圖是將元素旋轉
90 度的情形
…其中
top left, 0 0, 0 0 0,
與
top left 0
都是相同的
6
。設定原點之後（或省略，因
此設定為預設值
transform-origin: center center 0;）
，就可選擇變形種類，我們使用
transform
特性及一或多個變形值來設定。
transform 特性
CSS
transform
特性已取得 Firefox 3.5+、Opera 10.5、Internet Explorer 9 及 WebKit（甚
至在 iPhone 問世之前）的支援，它可以讓你修改 CSS 模型的座標空間，將元素平移、
旋轉、調整大小，及傾斜。CSS 變形會修改座標空間，讓我們改變內容的位置，但不會
干擾文件流。變形後的元素佔用的位置與空間，就是元素變形之前佔用的位置與空間。
我們使用變形功能來改變元素的外觀。
transform
特性的值是一串以空格分隔的變形函
式，它們會被依序套用。
transform
函式包括：
translate()
如圖 10-3 所示的
translate(x, y)
功能函式類似相對定位、平移或重新定位，會將一個
元素由左往右移動 x，及由上往下移動 y：
-webkit-transform: translate(15px, -15px);
-ms-transform: translate(15px, -15px);
transform: ...
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