iphone更新uilabel和uiimageview

我有三个标签和一个uimageview对象。标签显示有关图像的信息。我的问题是我无法更新标签和图像。下面的代码只更新标签。如何更新uiimageview（ARView2）？iphone更新uilabel和uiimageview

- (void)captureOutput:(AVCaptureOutput *)captureOutput 
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer 
     fromConnection:(AVCaptureConnection *)connection 
{ 
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 

    bufferContent = createIplImageFromSampleBuffer(sampleBuffer); 
    [self performSelectorOnMainThread:@selector(updateLabels) withObject:nil waitUntilDone:YES]; 

    [pool drain]; 
} 
-(void)updateLabels 
{ 
    results = tracking(bufferContent); 
    labelFPS.text =[NSString stringWithFormat:@"%.2f ms",results.resultTime]; 
    labelKeypoints.text = [NSString stringWithFormat:@" %d",results.noKeypoints]; 
    labelRecognised.text = [NSString stringWithFormat:@"%d",results.resultTime]; 
    [ARview2 setImage:[self UIImageFromIplImage:results.resultImg]]; 

}

当我使用此代码：

- (void)captureOutput:(AVCaptureOutput *)captureOutput 
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer 
     fromConnection:(AVCaptureConnection *)connection 
{ 
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 

    bufferContent = createIplImageFromSampleBuffer(sampleBuffer); 
    results = tracking(bufferContent); 
    labelFPS.text =[NSString stringWithFormat:@"%.2f ms",results.resultTime]; 
    labelKeypoints.text = [NSString stringWithFormat:@" %d",results.noKeypoints]; 
    labelRecognised.text = [NSString stringWithFormat:@"%d",results.resultTime]; 
    [ARView2 performSelectorOnMainThread:@selector(setImage:) withObject:[self UIImageFromIplImage:results.resultImg] waitUntilDone:YES]; 

    [pool drain]; 
}

仅ARView2与新的图像更新。但标签不会改变它们的值。

FINAL ANSWEAR 好的。不知何故，我设法达到我的目标。我不知道这是否正确，但它的工作原理。我发布代码，希望有人会发现它有用。

- (void)captureOutput:(AVCaptureOutput *)captureOutput 
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer 
     fromConnection:(AVCaptureConnection *)connection 
{ 
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 

    bufferContent = createIplImageFromSampleBuffer(sampleBuffer); 
    results = tracking(bufferContent); 

    [arView performSelectorOnMainThread:@selector(setImage:) withObject:[self UIImageFromIplImage:results.resultImg] waitUntilDone:YES]; 
    [self performSelectorInBackground:@selector(updateLabels) withObject:nil]; 

    [pool drain]; 
} 
-(void)updateLabels 
{ 
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 
    labelFPS.text =[NSString stringWithFormat:@"%.2f ms",results.resultTime]; 
    labelKeypoints.text = [NSString stringWithFormat:@" %d",results.noKeypoints]; 
    labelRecognised.text = [NSString stringWithFormat:@"%d",results.resultTime]; 
    [pool drain]; 
    pool = nil; 

}

来源

2011-06-07 franz

“ARview2”是什么意思？ – 2011-06-07 15:36:55

它是UIImageView对象，这是我如何声明它UIImageView * ARview2; – franz 2011-06-07 16:27:24

当你说你不能同时更新时，你是什么意思？ – 2011-06-07 16:36:41

检查，如果你在UI正确连接ARview2;
results.resultImg是什么？这是一个有效的图像？

来源

2011-06-07 15:39:02 CristiC

是的，它是连接，是的，它是有效的图像。我发布了更新UIImageView但不更新标签的代码。我不知道如何在同一时间更新标签和UIImageView – franz 2011-06-07 17:09:49

iphone更新uilabel和uiimageview

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