錯誤的接收器類型'CGImageRef'（又名'CGImage *'）

我是一名iOS初學者，並且正在關注How can I manipulate the pixel values in a CGImageRef in Xcode以學習更改CGImages。我改變了一些代碼，以便圖像中的中間像素應該被塗成紅色，而不是交換每個像素的藍色和紅色緩衝區。錯誤的接收器類型'CGImageRef'（又名'CGImage *'）

但現在我得到的「壞接收器類型 'CGImageRef'（又名 'CGImage *'）」的錯誤在此函數

manipulated = [imageRef colorMiddle];

發送消息：

- (void)renderColorFrame:(CMSampleBufferRef)sampleBuffer 
    { 

CVImageBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); 
CVPixelBufferLockBaseAddress(pixelBuffer, 0); 

size_t cols = CVPixelBufferGetWidth(pixelBuffer); 
size_t rows = CVPixelBufferGetHeight(pixelBuffer); 

CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); 

unsigned char *ptr = (unsigned char *) CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0); 

NSData *data = [[NSData alloc] initWithBytes:ptr length:rows*cols*4]; 
CVPixelBufferUnlockBaseAddress(pixelBuffer, 0); 

CGBitmapInfo bitmapInfo; 
bitmapInfo = (CGBitmapInfo)kCGImageAlphaNoneSkipFirst; 
bitmapInfo |= kCGBitmapByteOrder32Little; 

CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)data); 

CGImageRef imageRef = CGImageCreate(cols, 
            rows, 
            8, 
            8 * 4, 
            cols*4, 
            colorSpace, 
            bitmapInfo, 
            provider, 
            NULL, 
            false, 
            kCGRenderingIntentDefault); 



//hier image ref verarbeiten!! 
manipulated = [imageRef colorMiddle]; //here 

leftImage = CGImageCreateWithImageInRect(imageRef, CGRectMake(0, 0, self.view.frame.size.width * 6/7, self.view.frame.size.height)); 

rightImage = CGImageCreateWithImageInRect(imageRef, CGRectMake(self.view.frame.size.width/7, 0, self.view.frame.size.width * 6/7, self.view.frame.size.height)); 

    //left image 
_colorImageViewL.image = [[UIImage alloc] initWithCGImage:leftImage/*imageRef*/]; 

    //right image 
_colorImageViewR.image = [[UIImage alloc]initWithCGImage:rightImage/*imageRef*/]; 

//Full 
// _colorImageViewFull.image = [[UIImage alloc]initWithCGImage:imageRef]; 


CGImageRelease(imageRef); 
CGImageRelease(leftImage); 
CGImageRelease(rightImage); 
CGDataProviderRelease(provider); 
CGColorSpaceRelease(colorSpace); 

}

我不不明白爲什麼我在這裏得到這個錯誤，因爲消息應該與匹配參數一起發送：

 @interface ViewController() <AVCaptureVideoDataOutputSampleBufferDelegate> { 

     STSensorController *_sensorController; 

     AVCaptureSession *_avCaptureSession; 
     AVCaptureDevice *_videoDevice; 

     UIImageView *_depthImageView; 
     //UIImageView *_depthImageView2; 
     //UIImageView *_normalsImageView; 

     //Left 
     UIImageView *_colorImageViewL; 

     //right 
     UIImageView *_colorImageViewR; 

     //Full 
     //UIImageView *_colorImageViewFull; 

     uint16_t *_linearizeBuffer; 
     uint8_t *_coloredDepthBuffer; 
     uint8_t *_normalsBuffer; 

     STNormalEstimator *_normalsEstimator; 

     UILabel* _statusLabel; 

     GLKMatrix4 _projection; 

     CGImageRef leftImage; 
     CGImageRef rightImage; 
     CGImageRef manipulated; 




     AppStatus _appStatus; 

    } 

    - (BOOL)connectAndStartStreaming; 
    - (void)renderDepthFrame:(STDepthFrame*)depthFrame; 
    - (void)renderNormalsFrame:(STDepthFrame*)normalsFrame; 
    - (void)renderColorFrame:(CMSampleBufferRef)sampleBuffer; 
    - (void)setupColorCamera; 
    - (void)startColorCamera; 
    - (void)stopColorCamera; 
    - (CGImageRef)colorMiddle:(CGImageRef)image; //here 

@end

有沒有人知道什麼導致錯誤，以及如何解決這個問題？我只是想不出任何事情，因爲所有使用CGImageRefs的地方都行得通，而且據我所知，這應該是正確的做法。

請仔細看看這個問題的不好看，因爲我仍然需要學習如何格式化正確的一切。

在此先感謝！

來源

2016-05-04 seko

你行：

manipulated = [imageRef colorMiddle];

需要是：

manipulated = [self colorMiddle:imageRef];

colorMiddle:是您ViewController類中的方法。

來源

2016-05-04 17:14:12 rmaddy

錯誤的接收器類型'CGImageRef'（又名'CGImage *'）

回答

相關問題