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 #import "CatZanButton"

 CatZanButton *zanBtn=[[CatZanButton alloc] initWithFrame:CGRectMake(0, 0, 50, 50) zanImage:[UIImage imageNamed:@"Zan"] unZanImage:[UIImage imageNamed:@"UnZan"]];
 [zanBtn setCenter:self.view.center];
 [self.view addSubview:zanBtn];

 [zanBtn setClickHandler:^(CatZanButton *zanButton) {
   if (zanButton.isZan) {
     //Do something
   }else{
     //Do something
   }
 }];