method "setImage:" not find on GPUImageView

Question

I'll set an image on a GPUImageView.

UIImage *adjustedImage = [lookupFilter imageFromCurrentFramebufferWithOrientation:0];
[self->_imgView setImage:adjustedImage];

But in the GPUImageView Class is not the setImage: method. Can someone post the whole method of setImage: or tell me how I can find this method? I thought I can copy the method from the UIImageView.m file and paste it in the GPUImageView.m file. But I can't find the UIImageView.m file.

GPUImageView.h

#import <UIKit/UIKit.h>
#import "GPUImageContext.h"

typedef enum {
    kGPUImageFillModeStretch,                       // Stretch to fill the full view, which may distort the image outside of its normal aspect ratio
    kGPUImageFillModePreserveAspectRatio,           // Maintains the aspect ratio of the source image, adding bars of the specified background color
    kGPUImageFillModePreserveAspectRatioAndFill     // Maintains the aspect ratio of the source image, zooming in on its center to fill the view
} GPUImageFillModeType; 

/**
 UIView subclass to use as an endpoint for displaying GPUImage outputs
 */
@interface GPUImageView : UIView <GPUImageInput>
{
    GPUImageRotationMode inputRotation;
}

/** The fill mode dictates how images are fit in the view, with the default being kGPUImageFillModePreserveAspectRatio
 */
@property(readwrite, nonatomic) GPUImageFillModeType fillMode;

/** This calculates the current display size, in pixels, taking into account Retina scaling factors
 */
@property(readonly, nonatomic) CGSize sizeInPixels;

@property(nonatomic) BOOL enabled;

/** Handling fill mode

 @param redComponent Red component for background color
 @param greenComponent Green component for background color
 @param blueComponent Blue component for background color
 @param alphaComponent Alpha component for background color
 */
- (void)setBackgroundColorRed:(GLfloat)redComponent green:(GLfloat)greenComponent blue:(GLfloat)blueComponent alpha:(GLfloat)alphaComponent;

- (void)setCurrentlyReceivingMonochromeInput:(BOOL)newValue;

@end

Answer 1

GPUImageView is not a subclass of UIImageView. It has no -setImage: method. You don't set UIImages to it. It doesn't work that way.

A GPUImageView is a destination for your filter chain. To display an image within it, you set the GPUImageView as a target either of your GPUImagePicture instance or of the filters that follow from that (if you want to display the filtered output). You do not set a UIImage as the contents of that view. Again, it's not a UIImageView.

There are plenty of examples for how to use a GPUImageView with the samples that ship with GPUImage. I also explain how this works in my documentation for the project. Please review that before proceeding further.