IOS点赞效果按钮源代码下载

#import"CatZanButton"CatZanButton*zanBtn=[[CatZanButtonalloc]initWithFrame:CGRectMake(0,0,50,50)zanImage:[UIImageimageNamed:@"Zan"]unZanImage:[UIImageimageNamed:@"UnZan"]];[zanBtnsetCenter:self.view.center];[self.viewaddSubview:zanBtn];[zanBtnsetClickHandler:^(CatZanButto