RGB values for clear color in iphone?

Question

What is RGB and alpha value for clear color? i want to do it programmatic, don't need [UIColor clearColor]...??

Answer 1

To represent clear color in rgb format one may use

'rgba(0,0,0,0)'

It just includes the alpha value.

Answer 2

According to the Documentation :

"Returns a color object whose grayscale and alpha values are both 0.0."

Answer 3

创建一个颜色对象，其灰度和alpha值均为0.0

UIColor *clearColor = [UIColor colorWithWhite:0.0/255 alpha:0.0];

Answer 4

只需使用：

[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.0];