Question

花了一些时间，并不能真正理解问题出在哪里。

我正在使用GPUImage 0.1.3（来自CocoaPods），并且代码非常简单：

GPUImageiOSBlurFilter *iosBlur = [[GPUImageiOSBlurFilter alloc] init];
UIImage *splashScreenImage = [UIImage imageNamed:@"Splash"];
UIImage *bluredImage = [iosBlur imageByFilteringImage:splashScreenImage];

bluredImage是零。我逐步完成了代码，iosBlur并不是没有，splashScreenImage并没有包含正确的图像（在调试器的快速查看中查看）。所以我不知道问题出在哪里。

Answer 1

这是我如何解决它 - 原油，但有效。顺便说一句 - 这仍然发生在最新的GPUImage代码中，尽管我主要在模拟器中看到这个问题。

    int errorCount = 0;
    UIImage *blurImage;
    //Loop workaround for some unknown GPUImage issue where sometimes the result is nil.
    while (! (blurImage = [imageFilter imageByFilteringImage:image]) ) {
        ++errorCount;
    }

    if (errorCount > 0) {
        NSLog(@"GPUImageiOSBlurFilter imageByFilteringImage error count: %i", errorCount);
    }

Answer 2

来自GPUImageOutput.h

// Platform-specific image output methods
// If you're trying to use these methods, remember that you need to set -useNextFrameForImageCapture 
// before running -processImage or running video and calling any of these methods, 
// or you will get a nil image
#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
- (UIImage *)imageByFilteringImage:(UIImage *)imageToFilter;

GPUImageiOSBlurFilter imageByFilteringImage：返回nil

2 个答案: