Question

在我的previous question中，我问为什么我的申请提前终止。事实证明我在下面的一行中得到了这个警告，这可能有助于我解决我的问题。

以下是代码：

NSMutableArray *redValues = [NSMutableArray array];
NSUInteger redValuesLength = [redValues count];
float totalOne, diffForAverage;
int amount = 1;
__block int counter = 0;
NSInteger j;

GPUImageVideoCamera *videoCamera = [[GPUImageVideoCamera alloc] initWithSessionPreset:AVCaptureSessionPreset640x480 cameraPosition:AVCaptureDevicePositionBack];
videoCamera.outputImageOrientation = UIInterfaceOrientationPortrait;

GPUImageAverageColor *averageColor = [[GPUImageAverageColor alloc] init];
[averageColor setColorAverageProcessingFinishedBlock:^(CGFloat redComponent, CGFloat greenComponent, CGFloat blueComponent, CGFloat alphaComponent, CMTime frameTime)
 { 
     NSLog(@"%f", redComponent);
     [redValues addObject:@(redComponent * 255)];
 }];

[videoCamera addTarget:averageColor];
[videoCamera startCameraCapture];

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 27 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
    [videoCamera stopCameraCapture];
});

totalOne = [redValues[25] floatValue];
float average = totalOne / amount;

for (j = (counter + 25); j < (redValuesLength - 25); j++)
{
    diffForAverage = average - [redValues[j + 1] floatValue];

    if (diffForAverage > -1 && diffForAverage < 1)
    {
        totalOne += [redValues[j + 1] floatValue];
        amount++;
        [arrayOne addObject:[NSNumber numberWithInt:(j - 25)]];
        counter++;
    }

    else
    {
        if (arrayOneLength >= 15)
        {
            break;
            counter++; // WARNING OCCURS HERE
        }

        else
        {
            [arrayOne removeAllObjects];
            totalOne = [redValues[j + 1] floatValue];
            counter++;
        }
    }
}

为什么上面的注释行永远不会被运行？这是我的for循环问题，还是我的if语句，还是完全不同的东西？

Answer 1

因为你之前有一个break命令。 break命令会立即将您带出for循环，因此下一行不会被执行。

代码永远不会被执行警告

1 个答案: