Unity：GameObject多同类型组件时GetComponent<T>的返回规则问询

Great question! Let's break this down, using HingeJoint as our example:

If you have multiple instances of the same component (like two HingeJoint components) attached to a single GameObject and call GetComponent<HingeJoint>(), here's what we know right now:

• There’s no official, definitive answer from Unity on which exact component gets returned in this scenario. Unity’s official documentation doesn’t explicitly address this edge case.
• A common developer guess (rooted in building custom engines that mimic Unity's behavior) is that it would return the first matching component in the GameObject’s internal component array. But critical to note: this is just a deduction from imitation, not a confirmed rule from Unity itself.

As a best practice, if you need to target a specific component of the same type, avoid relying on GetComponent<T> here. Instead, use GetComponents<T>() to retrieve all instances of the component, then explicitly select the one you need from the resulting array.

内容的提问来源于stack exchange，提问作者Jimmy Huch