Explain:The first value?is the horizontal position and the second value is the vertical. The top left corner is 0 0. Units can be pixels (0px 0px) or any other?CSS units. If you only specify one value, the other value will be 50%. You can mix % and positions.
2015-10-15
Explain:The first value?is the horizontal position and the second value is the vertical. The top left corner is 0 0. Units can be pixels (0px 0px) or any other?CSS units. If you only specify one value, the other value will be 50%. You can mix % and positions.
也就是兩個(gè)值分別代表水平位置和垂直位置。也可以直接用英文,例如bottom,top等代替,可以找到圖片需要選取的具體位置。
2015-08-01
遮罩原理