xcode - callback with UIButton Event -


i have error says "exec_bad_access". want run callback after uibutton clicked.

here code:

dialog.m

     - (void)showdialoginparentview: (uiview *)parentview                           withtext:(nsstring *)text                        leftbtntext:(nsstring *)t1                       rightbtntext:(nsstring *)t2                            handler:(void(^)(int))handler {          vhandler = [handler copy];          // init control button selector(event) //         _rightbtn = [uibutton buttonwithtype:uibuttontypecustom];         _rightbtn.frame = cgrectmake((self.altview.frame.size.width / 2), 1.0, (self.altview.frame.size.width / 2), self.altview.frame.size.height);         _rightbtn.titlelabel.textcolor = [uicolor whitecolor];         [_rightbtn settitle:@"bla bla" forstate:uicontrolstatenormal];          [_rightbtn addtarget:self action:@selector(button_click:) forcontrolevents:uicontroleventtouchupinside];          // somethings here //  }  - (void)button_click: (uibutton *)sender {     // callback here  when click button //     vhandler(1); }

here code calls:

foo.m

-(void)showdialog {     dialog *d = [[dialog alloc] init];     [d showdialoginparentview:self.view                                   withtext:@"bla"                                leftbtntext:@"bla bla"                               rightbtntext:@"bla bla bla"                                    handler:^(int res) {                                        // somethings //                                    }]; }

code works fine when run vhandler in *- (void)showdialoginparentview: (uiview *)parentview withtext:(nsstring *)text leftbtntext:(nsstring *)t1 rightbtntext:(nsstring )t2 handler:(void(^)(int))handle method. want run vhandler when uibutton clicked.

i've solved problem myself. problem 'vhandler' null after init dialog class. used static variable has solved.

dialog.h

+ (void)showdialoginparentview: (uiview *)parentview withtext:(nsstring *)text                    leftbtntext:(nsstring *)t1                   rightbtntext:(nsstring *)t2                        handler:(void(^)(int))handler;

foo.m

  static vhandler _handler;

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