ios - UIButton action selector -

i have following code:

- (uiview *)tableview:(uitableview *)tableview viewforheaderinsection:(nsinteger)section {        uiimage * search = [uiimage imagenamed: @"search.png"];     uiimageview * s = [[uiimageview alloc] initwithimage: search];     s.frame = cgrectmake(15, 14, search.size.width, search.size.height);      uiimage * simg = [uiimage imagenamed: @"m_search_back.png"];     uiimage * img = [uiimage imagenamed: @"m_top.png"];     cgrect searchbarframe = cgrectmake(0, 0, self.tableview.frame.size.width, 45.0);     self.searchbar = [[uisearchbar alloc] initwithframe:searchbarframe];     self.searchbar.backgroundimage = simg;     [self.searchbar setsearchfieldbackgroundimage: simg forstate:uicontrolstatenormal];     self.searchbar.delegate = self;     [self.searchbar addsubview: s];       uitextfield *searchfield = [self.searchbar valueforkey:@"_searchfield"];      // change search bar text color     searchfield.textcolor = [uicolor colorwithred: 178.0/255 green:178/255.0 blue:178/255.0 alpha:1.0];     searchfield.font = [uifont fontwithname: @"helveticaneue-light" size: 16.0f];      // change search bar placeholder text color     [searchfield setvalue:[uicolor whitecolor] forkeypath:@"_placeholderlabel.textcolor"];     [self.searchbar setplaceholder:@"search investors, startups, founders, etc"];       uiimageview * top = [[uiimageview alloc] initwithimage: img];     top.frame = cgrectmake(0, self.searchbar.frame.size.height + 1, 800, img.size.height);      uilabel * topl = [[uilabel alloc] initwithframe: cgrectmake(30, 10, 800, img.size.height - 30)];     topl.text = @"connect with\nfounders , investors";     topl.numberoflines = 0;     topl.backgroundcolor = [uicolor clearcolor];     topl.textcolor = [uicolor whitecolor];     topl.textalignment = nstextalignmentcenter;     [topl setfont: [uifont fontwithname: @"helveticaneue-bold" size: 17.0f]];     [topl sizetofit];     [top addsubview: topl];      uiimage * loginbtn = [uiimage imagenamed: @"loginbtn.png"];     uiimage * sep1 = [uiimage imagenamed: @"m_sep1.png"];       uibutton * login = [[uibutton alloc] initwithframe: cgrectmake(30, 70, loginbtn.size.width, loginbtn.size.height)];     [login.titlelabel setfont: [uifont fontwithname: @"helveticaneue-medium" size: 16.0f] ];     [login settitle:@"login" forstate: uicontrolstatenormal];     [login addtarget: self action:@selector(loginuser:) forcontrolevents:uicontroleventtouchupinside];     [login setbackgroundimage: loginbtn forstate: uicontrolstatenormal];     [top addsubview: login];       uiimage * greenbtn = [uiimage imagenamed: @"greenbtn.png"];     uibutton *  green = [[uibutton alloc] initwithframe: cgrectmake(loginbtn.size.width + 50, 70, greenbtn.size.width, greenbtn.size.height)];     [green settitle:@"register" forstate: uicontrolstatenormal];     [green.titlelabel setfont: [uifont fontwithname: @"helveticaneue-medium" size: 16.0f] ];     [green  setbackgroundimage: greenbtn forstate: uicontrolstatenormal];     [green addtarget:self action:@selector(registeruser:) forcontrolevents:uicontroleventtouchupinside];     [top addsubview: green];      uiimageview * sep2 = [[uiimageview alloc] initwithimage: sep1];     sep2.frame = cgrectmake(0, top.frame.origin.y + top.frame.size.height - 2, top.frame.size.width, 1);       uiimage * sep5img = [uiimage imagenamed: @"m_sep5.png"];     uiimageview * sep5 = [[uiimageview alloc] initwithimage: sep5img];     sep5.frame = cgrectmake(0, self.searchbar.frame.origin.y + self.searchbar.frame.size.height, self.searchbar.frame.size.width, sep5img.size.height);      uiview * toph = [[uiview alloc] initwithframe: cgrectmake(0, 0, 800, simg.size.height + top.frame.size.height + 2)];       [toph addsubview: self.searchbar];     [toph addsubview: sep5];     [toph addsubview: top];     [toph addsubview: sep2];      return toph; } 

unfortunately, tried adding action uibutton "login" not working. loginuser function not being called. can do? setting action on uibutton correctly?

thanks.

i believe imageviews have userinteractionenabled set no default. try adding:

top.userinteractionenabled = yes;