convert c++ vector to Objective-c - c++

Question

I currently have
vector<vector<cv::Point>> example;
and want to be able to pass it to a swift function, So I assume I should start by making it like this (or is there easier way?):
NSArray[NSArray[Int,Int]]
cv::Point is an object of two int properties.
I have tried
NSMutableArray *example1[example.size()];
for(i = 0;i< example.size();i++){
if(example[i].size() > 5){ //irrelevant
NSMutableArray *second[example[i].size()];
for(int p = 0;p<example[i].size();p++){
NSInteger p1 = example[i][p].x;
NSInteger p2 = example[i][p].y;
NSInteger point[2] = {p1,p2};
[second addObject: point];
}
[example addObject: second];
}
}
I have been spending ages and constantly getting different data type errors, etc. How would you do it, or correct this?
Thanks

Answer 1

You can use NSValue to store a simple struct into NSMutableArray:
NSMutableArray *example1 = [NSMutableArray arrayWithCapacity:example.size()];
for(int i = 0;i< example.size();i++){
if(example[i].size() > 5){ //irrelevant
NSMutableArray *second = [NSMutableArray arrayWithCapacity:example[i].size()];
for(int p = 0;p<example[i].size();p++){
NSValue *point = [[NSValue alloc] initWithBytes:&example[i][p] objCType:#encode(cv::Point)];
[second addObject:point];
}
[example1 addObject:second];
}
}