in the interface builder,i can find the background tag,and select the color and the opacity.
if I create the UIView programmatically,if I want to change color,I can set the backgroundColor property
the question is if I want to change the opactiy,What is the property should I change?
Thanks a lot.
使用视图的alpha
属性,或者,如果您不希望视图的内容具有相同的不透明度更改,请更改背景颜色的alpha分量(如使用+colorWithRed:green:blue:alpha:
, +colorWithHue:saturation:brightness:alpha:
或+colorWithWhite:alpha:
以外的其他值。
You can just use
self.alpha = someFloat;
in your view class.
If you want to change it from viewcontroller, use
self.view.alpha = someFloat;
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