iOS Development viewwillappear: (BOOL) animated when the real machine debugging do not do

This document is reproduced in the. h file that http://blog.sina.com.cn/s/blog_a843a8850101e0g7.html now needs.

Then, in the required. m file, insert the key code inside:
self.navigationcontroller.delegate=self;
Then go to this time Navigationcontroller agent function, you can.
-(void) Navigationcontroller: (Uinavigationcontroller *) Navigationcontroller Willshowviewcontroller: ( Uiviewcontroller *) Viewcontroller animated: (BOOL) animated
{
[Viewcontroller viewwillappear:animated];
}
-(void) Viewwillappear: (BOOL) animated{

NSLog (@ "can also be used successfully. ");
}
This is one of the ways. I think it is more reasonable to use it.

Inspired by http://www.cnblogs.com/zxtx/articles/1806127.html

iOS Development viewwillappear: (BOOL) animated when the real machine debugging do not do