IOS get keyboard drop speed

Making the view you create changes the frame based on the display and whereabouts of the keyboard, which requires the notification mechanism of iOS, which first needs to be registered in the notification hub

1     Object : nil]; 2     3     [[Nsnotificationcenter Defaultcenter]  object: nil];

The following is the method code of the binding

-(void) Keyboardwasshown: (nsnotification *) notif{        _tableview.frame=cgrectmake (0,-  the , Main_width, main_hright);} -(void) Keyboardwashidden: (nsnotification *) notif{    _tableview.frame=cgrectmake (0 0 , Main_width, main_hright);}

The above code is not animated, but can be achieved and the keyboard with the same rate of change frame, which is a great feature

If you are not at ease, you can manually write the animation effect, the following is the code

-(void) Keyboardwasshown: (nsnotification *) notif{    [UIView beginanimations:nil context:nil];    [UIView Setanimationduration:[[notif.userinfo Objectforkey:uikeyboardanimationdurationuserinfokey] floatValue];    [UIView Setanimationcurve:[[notif.userinfo Objectforkey:uikeyboardanimationcurveuserinfokey] integerValue];    _tableview.frame=cgrectmake (0,-main_width, main_hright);    [UIView commitanimations];}

IOS get keyboard drop speed