如何使用Objective C返回CGPoints数组

Question

I have a function in my project called doWorkOnSampleBuffer that returns a value of CGPoint.

- (CGPoint)doWorkOnSampleBuffer:(CMSampleBufferRef)sampleBuffer inRects:(NSArray<NSValue *> *)rects {

    CGPoint mypoint[2];

    mypoint[0] = CGPointMake(-1, -1);
    mypoint[1] = CGPointMake(5, 5);

    return mypoint[1]
}

This function is called inside another swift file as follow:

var myPoint = wrapper?.doWork(on: sampleBuffer, inRects: boundsArray)

Now, I would like to make the doWorkOnSampleBuffer function return the CGPoint array " mypoint ", instead of just one CGPoint value.

So, how can I adapt my code to do that?

Answer 1

Solved!

The answer is:

- (NSArray<NSValue *> *)doWorkOnSampleBuffer:(CMSampleBufferRef)sampleBuffer inRects:(NSArray<NSValue *> *)rects {

    CGPoint mypoint[2];

    mypoint[0] = CGPointMake(-1, -1);
    mypoint[1] = CGPointMake(5, 5);

    NSArray *myCGPointArray = @[[NSValue valueWithCGPoint:mypoint[0]],[NSValue valueWithCGPoint:mypoint[1]]];

    return myCGPointArray;
}

Now, if you call this function like:

var myPoint = wrapper?.doWork(on: sampleBuffer, inRects: boundsArray)

So you can access values as follows:

myPoint![0].cgPointValue.x
myPoint![0].cgPointValue.y
myPoint![1].cgPointValue.x
myPoint![1].cgPointValue.y