RGB values for clear color in iphone?

开发者_如何学Go

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

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To represent clear color in rgb format one may use

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

It just includes the alpha value.

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According to the Documentation:

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

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Just use:

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

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Create a color object whose grayscale and alpha values are both 0.0

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