XCode8 Swift3 - 打开联系人列表并通过单击检索数据的问题

Currently I'm developing my first iOS App and I'm a little slow and rude about the code (it's so weird and different from java) and, if this was the only problem, with the new update, Xcode is making my code insane. I think I solved most of the issues but...Currently I'm developing my first iOS App and I