UIButton没有响应UITableViewCell中的单击事件

there is this dark sorcery in ios is preventing my button being clicked. if i don't add button to the uitableviewcell, and i click the button, the event is triggered. but if the button is in uitableviewcell, it won't get triggered, it seems table i have sample code ready, if you guys can help me, please just create a simple single-view application in xcode, and just paste the following codethere is this dark sorcery in ios is preventing