Hello Duncan, I am a computer science student from HK, I am spending my time on a ER-Diagram tutor application of objective c, but i got some trouble on drag relationship line between entities. My idea is that to find the shortest path between two entities, but i found it is difficult to find the shortest path then build the line and how can the line follow moving when I move those linked entities.
What can I do to do so? i am puzzling on it.
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