在AS3中,使用startDrag()就能实现拖拽,但是js中,却没有此方法,但是也是可以实现的,说穿了,挺简单的。实现拖拽方法不少,我呢,js功力尚浅,只知道一种实现原理。如下: ①鼠标按下+鼠标移动 → 拖拽 ②鼠标松开 → 无拖拽 ③鼠标偏移 → 拖拽距离
用JavaScript事件方法表示就是: ① onmousedown + onmousemove → startDrag() ② onmouseup → stopDrag() ③ ……
关键点就是让鼠标的偏移值赋给拖拽对象。
JavaScript写的一个简单的小拖拽框
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