uibutton - Programmatically created a button on iOS, but no action when pressed -

i created button code below, not respond in log (supposed show "ha"). strangest part have been able exact code work inside collection view, not on viewcontroller. doing wrong button press "myaction"?

-(void)viewdidload {     uibutton *buttonz = [uibutton buttonwithtype:uibuttontypecustom];         buttonz.frame = cgrectmake(160, 0, 160, 30);         [buttonz settitle:@"charge" forstate:uicontrolstatenormal];         [buttonz addtarget:self action:@selector(myaction:) forcontrolevents:uicontroleventtouchupinside];         [buttonz setenabled:yes];          [buttonz setbackgroundcolor:[uicolor bluecolor]];          //add button view         [backimageview addsubview:buttonz]; }  -(void)myaction:(id)sender { nslog(@"ha");     [self resignfirstresponder];     nslog(@"ha"); } 

1)

you don't need "resignfirstresponder" on button (seems of time see "resignfirstresponder" in text fields or text views).

2)

change control event uicontroleventtouchupinside uicontroleventtouchdown

3)

the parent uiimageview might not have "userinteractionenabled" set true, means events won't propogated (or sent along) subviews.

to make events available subviews, change parent view's userinteractionenabled property via:

backimageview.userinteractionenabled = yes; 

before adding subview.