NSArray - getting the closest object to origin

using Objective-C for iPhone, I'm attempting to gather the closest object to my origin.

All my objects are in an NSMutableArray and have CGPoint property of their current location.

Using simple trig I can find the magnitudes of all my o开发者_StackOverflow社区bjects with ease, but Im trying to find the 'closest' object to my origin. Does anyone have any idea how to do this?

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loop through all the objects, calculate the distance to your origin while keeping the minimum value?

distanceAO = sqrt(sqr(Ax-Ox)+sqr(Ay-Oy))

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Do you mean something like:

CGFloat minDistance = FLT_MAX;
MyClass *minObject = nil;
for (MyClass *obj in objects)
{
    if ([obj distanceFromOrigin] < minDistance)
    {
        minObject = obj;
        minDistance = [obj distanceFromOrigin];
    }
}

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there are sorting methods for NSArray which easies your work. have a look at this link

i am not sure exactly which method solves your case but have a look into those methods you can definitely achieve it

TNQ