IOS如何实现软键盘出现的时候，窗口的高度减少？（类似于聊天的窗口）

Question

我想实现的效果就类似于微信或者手Q的聊天窗口，输入框在最底下，然后获得焦点时，软键盘弹出，但是此时聊天窗口的最顶上的内容还在，也就是聊天的窗口变成（手机屏幕-软键盘高度）。

思路或者demo代码或者github开源代码都OK

Answer 1

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillAppear:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillDisappear:) name:UIKeyboardWillHideNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];
    

Then just set the frame of the UI

Answer 2

Are you talking about NavagationBar?
If you are talking about this, then your problem will be solved. Just add a NavagationController to the first view as the rootController. This is very simple, but you still need to learn it

Answer 3

Use notifications to monitor keyboard events, and then change the frame of the view. This is the idea of ​​​​2.