透明的GPUImageView？

Question

I am using a GPUImageView inside my iOS application. I want that the GPUImageView have a transparent background. I tried setBackground:[UIColor clearColor] It does not work. Any workarounds?

Regards

Answer 1

I found you need to set both of these to get a transparent background. Neither works alone.

strengthPreviewImageView.backgroundColor = [UIColor clearColor];
[strengthPreviewImageView setBackgroundColorRed:0 green:0 blue:0 alpha:0];

Answer 2

...您是否尝试过GPUImageView标头中的方法？

- (void)setBackgroundColorRed:(GLfloat)redComponent green:(GLfloat)greenComponent blue:(GLfloat)blueComponent alpha:(GLfloat)alphaComponent;