ios - Unrecognized selector issue for custom UIButton -


i'm making simple uibutton subclass.

.h file:

@interface vufollowbutton : uibutton  /**  designated initializer   @param follow highlights button if true  */ + (instancetype)buttonwithfollow:(bool)follow;  /*  * setting bool yes highlight button , change text "following"  * default "follow"  */ @property (nonatomic, assign) bool following;   @end

.m file:

 #import "vufollowbutton.h"  @implementation vufollowbutton  + (instancetype)buttonwithfollow:(bool)follow {      vufollowbutton* followbutton = (vufollowbutton*)[uibutton buttonwithtype:uibuttontypecustom];     [followbutton settitleedgeinsets:uiedgeinsetsmake(2., 8., 2., 8.)];     followbutton.layer.bordercolor = [uicolor whitcolor];     followbutton.layer.borderwidth = 2.0f;     [followbutton settitlecolor:[uicolor whitecolor] forstate:uicontrolstatenormal];     followbutton.titlelabel.font = [uifont nationalboldwithsize:17];     followbutton.following = follow;      return followbutton; }  - (void)setfollowing:(bool)following {      if (!following) {         self.backgroundcolor = [uicolor clearcolor];         [self settitle:@"follow" forstate:uicontrolstatenormal];     }     else {         self.backgroundcolor = [uicolor blackcolor];         [self settitle:@"following" forstate:uicontrolstatenormal];     } }  @end

but on line followbutton.following = follow;, i'm getting:

-[uibutton setfollowing:]: unrecognized selector sent instance 0x7f9c10f809b0

if set breakpoint before line, followbutton shows vufollowbutton in variable debugger , has property called following.

i know i'm missing basic here.

you're instantiating uibutton , casting vufollowbutton. instance you're returning of type uibutton, doesn't have setfollowing: accessor method or following property. reason following property visible because you've casted type vufollowbutton.

e.g.

vufollowbutton* followbutton = (vufollowbutton*)[uibutton buttonwithtype:uibuttontypecustom];

should be:

vufollowbutton* followbutton = [vufollowbutton buttonwithtype:uibuttontypecustom];

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