objective-c - iOS中拖动imageview，怎么设置拖动范围

Question

目前知道怎么自由拖动imageview了，可是不知道怎么才能让它只能在制定范围内拖动呢？求教

Answer 1

Who come, help me

Answer 2

This question is also a drunk one. Looking at the username, is the questioner a girl? A little thought on this issue will yield results.

A simple answer:
You need to set a range, and then determine whether it touches the edge based on the position of the imageView. If so, then you are not allowed to continue dragging in that direction.

Answer 3

既然你知道能拖动，那么在动的时候判断一下是否到了你指定的边缘，要是到了边缘，不让他移动即可。