ios - GPUImagePicture 与 GPUImageView 目标？

Question

我正在尝试将 GPUImagePicture 的输出发送到 GPUImageView，

这或多或少是我的代码:

GPUImageView *backgroundImageView = [[GPUImageView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UIImage *image = [UIImage imageNamed:@"photo"]; //The image is not nil
GPUImagePicture *imageInput = [[GPUImagePicture alloc] initWithImage:image];

[imageInput addTarget:backgroundImageView];
[self.view addSubview:backgroundImageView];

问题是 backgroundImageView 似乎没有渲染图像...可能发生了什么？

Answer 1

设置过滤器(或显示)链后，您需要

[imageInput processImage];

将图像传播到过滤器链并使其显示。