从UIImageView获取UIImage

-1

目前我正在开发基于相机的应用程序。我使用UIImageView内的相机图像来更容易操作。现在我想从核心成像添加一些效果。我能以某种方式从视图中获得图像吗？从UIImageView获取UIImage

这是我如何添加效果，但它只适用于图像。

NSString *filePath = 
[[NSBundle mainBundle] pathForResource:@"IpadIcon" ofType:@"png"]; 
NSURL *fileNameAndPath = [NSURL fileURLWithPath:filePath]; 

CIImage *beginImage = 
[CIImage imageWithContentsOfURL:fileNameAndPath]; 
CIContext *context = [CIContext contextWithOptions:nil]; 

CIFilter *filter = [CIFilter filterWithName:@"CISepiaTone" keysAndValues: kCIInputImageKey, beginImage, @"inputIntensity", [NSNumber numberWithFloat:0.8], nil]; 
CIImage *outputImage = [filter outputImage]; 

CGImageRef cgimg = 
[context createCGImage:outputImage fromRect:[outputImage extent]]; 
UIImage *newImg = [UIImage imageWithCGImage:cgimg]; 

[captureImage setImage:newImg];

获取图像

- (void) capImage { //method to capture image from AVCaptureSession video feed 
    AVCaptureConnection *videoConnection = nil; 
    for (AVCaptureConnection *connection in stillImageOutput.connections) { 

     for (AVCaptureInputPort *port in [connection inputPorts]) { 

      if ([[port mediaType] isEqual:AVMediaTypeVideo]) { 
       videoConnection = connection; 
       break; 
      } 
     } 

     if (videoConnection) { 
      break; 
     } 
    } 


    [stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler: ^(CMSampleBufferRef imageSampleBuffer, NSError *error) { 

     if (imageSampleBuffer != NULL) { 
      NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer]; 
      [self processImage:[UIImage imageWithData:imageData]]; 
     } 
    }]; 
}

来源

2014-01-17 WildWorld

你能具体谈谈您遇到的问题？ –

我有一个UIImageView内的图片。现在我需要把它弄出来。可能吗？ – WildWorld

'UIImage * theImage = imageView.image;'？ – hgwhittle

使用的UIImageView的image属性获取图像：

UIImage *theImage = imageView.image;

来源

2014-01-17 20:17:53 hgwhittle

谢谢:)在冷静后投票 – WildWorld

从UIImageView获取UIImage

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