Hello everyone!!
I have recently tried to practice with the Unity iPhone Development iPhone games, has recently encountered a problem is that the object plane and the plane crash triggered by objects
With the cube before adding rigedbody is OK, but the object plane can not be used rigidbody, I ask how can I solve the problem?
Hi, welcome to the forum!
Can you give some more detail about your game? Perhaps you could explain a bit more about what is supposed to be happening and what is going wrong.
Thank you for your reply andeeee 
I have to practice the game is a 2D image of the iPhone games, games are mainly items threw npc
The moment, if the problem lies in the collision detection of objects with the npc this part.
For example.:idea:
When I met my items NPC, that NPC will trigger a string of the post-action, such as being hit response,
Also since the game is to use 2D images, so my current default is the NPC’s actions to comic manner as was done playing.
ps also trouble you have a good way to let me know. 
Are you saying you need a way to detect collisions between objects, but the objects are 2D images, so it’s difficult to use colliders/rigidbodies?
Yes
Therefore, a function of the collision with the rigid body seems to me is of no use :?
NPC normally means ‘Non Player Character’
So, you need collision detection, but you don’t need rigidbody physics?
JTBentley Thank you for your response to
Therefore, 2D collision approach, I had the collision function to implement, thank you for the response 