Several important methods of iOS

Load class to memory, called when the program is just started, call before the main function

1.+ (void) load{

}

Initializes the class, which is called once when the class is used for the first time

2.+ (void) initialize{

}

Controller's view schema, setting the controller's root view, overriding this method, the storyboard file will no longer work

3.-(void) loadview{

}

View load Complete

4.-(void) viewdidload{

}

The view will appear

5.-(void) Viewwillappear: (BOOL) animated{

}

This method is called when using files such as Xib/storyboard.

6.-(ID) Initwithcoder: (Nscoder *) adecoder{

}

Called when the load Xib is complete, after 6. When using Xib, we can add components dynamically in the 6&7 two methods.

7.-(void) awakefromnib{

}

When creating a control with a hand code, we typically add components & set some of its own properties in this method dynamically. External calls to the Init method, the system will also automatically call this method

8.-(Instancetype) initWithFrame: (CGRect) frame

{

} generally we calculate the frame in this method, which is the control's last layout child control, which calculates the most accurate

9.-(void) layoutsubviews{

}

Several important methods of iOS