1016-03-Parent-Child Controller-----screen rotation event delivery

1. All pointers are strong pointers by default in arc.

2. In the demonstration of setting the relationship of two controllers for the parent-child controller, when a controller B's view is added to the view of a controller, if A and B are not related to the parent-child controller, the B controller cannot monitor the rotation of the screen when the screen is rotated. Only a controller can monitor the screen rotation.

3. The screen rotation event is emitted by the window. The window passes the event to its root controller.

/** Monitor Rotation */

-(void) Willrotatetointerfaceorientation: (uiinterfaceorientation) tointerfaceorientation Duration: (NSTimeInterval ) duration
{
NSLog (@ "==========willrotatetointerfaceorientation=====");
}
-(void) Didrotatefrominterfaceorientation: (uiinterfaceorientation) frominterfaceorientation
{
NSLog (@ "==========didrotatefrominterfaceorientation=====");
}

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1016-03-Parent-Child Controller-----screen rotation event delivery