iphone - textViewDidEndEditing is not called -

i'm new ios development.

i have written header file following

@interface textview : uitextview <uitextviewdelegate, uipopovercontrollerdelegate> 

in textview.h.

the implementation file code following :

- (bool)textviewshouldbeginediting:(textview *)textview {     zwlog(@"called should begin edit");     return yes; }  - (void)textviewdidbeginediting:(textview *)textview {     zwlog(@"called did begin edit"); }  - (bool)textviewshouldendediting:(textview *)textview {     zwlog(@"called should end editing");     return yes; }  - (void)textviewdidendediting:(textview *)textview {     zwlog(@"view did end edit");     return yes; }  - (bool)textview:(textview *)textview shouldchangetextinrange:(nsrange)range replacementtext:(nsstring *)text {     //my own code     return yes; }  - (void)textviewdidchange:(textview *)textview {    //my own code } 

when start typing character in uitextview, got response from

• textviewshouldbeginediting.
• textviewdidbeginediting.
• shouldchangetextinrange.
• textviewdidchange.

but didn't response textviewdidendediting or textviewshouldendediting. have idea why these not getting called?

thanks answers.

textviewdidendediting called when textfield resigns first responder, when keyboard disappears.