影子属性
- TypeScript
- JavaScript
参考
¥Reference
React Native 中有 3 组阴影 API:
¥There are 3 sets of shadow APIs in React Native:
-
boxShadow
:视图样式属性和符合规范的 同名的 Web 样式属性 实现。¥
boxShadow
: A View style prop and a spec-compliant implementation of the web style prop of the same name. -
dropShadow
:作为filter
View 样式 prop 的一部分,提供特定的过滤功能。¥
dropShadow
: A specific filter function available as part of thefilter
View style prop. -
各种
shadow
属性(shadowColor
、shadowOffset
、shadowOpacity
、shadowRadius
):它们直接映射到平台级 API 公开的原生对应物。¥Various
shadow
props (shadowColor
,shadowOffset
,shadowOpacity
,shadowRadius
): These map directly to their native counterparts exposed by the platform-level APIs.
dropShadow
和 boxShadow
之间的区别如下:
¥The difference between dropShadow
and boxShadow
are as follows:
-
dropShadow
作为filter
的一部分存在,而boxShadow
是一个独立样式的属性。¥
dropShadow
exists as part offilter
, whereasboxShadow
is a standalone style prop. -
dropShadow
是一个 alpha 蒙版,因此只有具有正 alpha 值的像素才会产生阴影。无论元素的内容是什么,boxShadow
都会投射到元素的边框周围(除非它是插入的)。¥
dropShadow
is an alpha mask, so only pixels with a positive alpha value will "cast" a shadow.boxShadow
will cast around the border box of the element no matter it's contents (unless it is inset). -
dropShadow
仅在 Android 上可用,boxShadow
可在 iOS 和 Android 上可用。¥
dropShadow
is only available on Android,boxShadow
is available on iOS and Android. -
dropShadow
不能像boxShadow
那样嵌入。¥
dropShadow
cannot be inset likeboxShadow
. -
dropShadow
没有像boxShadow
那样的spreadDistance
参数。¥
dropShadow
does not have thespreadDistance
argument likeboxShadow
.
boxShadow
和 dropShadow
通常都比 shadow
props 更强大。但是,shadow
props 映射到原生平台级 API,因此如果你只需要一个简单的阴影,建议使用这些 props。请注意,只有 shadowColor
适用于 Android 和 iOS,所有其他 shadow
属性仅适用于 iOS。
¥Both boxShadow
and dropShadow
are generally more capable than the shadow
props. The shadow
props, however, map to native platform-level APIs, so if you only need a straightforward shadow these props are recommended. Note that only shadowColor
works on both Android and iOS, all other shadow
props only work on iOS.
属性
¥Props
boxShadow
有关文档,请参阅 视图样式属性。
¥See View Style Props for documentation.
dropShadow
Android
有关文档,请参阅 视图样式属性。
¥See View Style Props for documentation.
shadowColor
设置阴影颜色。
¥Sets the drop shadow color.
此属性仅适用于 Android API 28 及更高版本。对于较低 Android API 上的类似功能,请使用 elevation
属性。
¥This property will only work on Android API 28 and above. For similar functionality on lower Android APIs, use the elevation
property.
类型 |
---|
color |
shadowOffset
iOS
设置阴影偏移。
¥Sets the drop shadow offset.
类型 |
---|
目的:{width: number,height: number} |
shadowOpacity
iOS
设置阴影不透明度(乘以颜色的 Alpha 分量)。
¥Sets the drop shadow opacity (multiplied by the color's alpha component).
类型 |
---|
number |
shadowRadius
iOS
设置阴影模糊半径。
¥Sets the drop shadow blur radius.
类型 |
---|
number |