从
Xcode 7 release notes起：
原文链接：https://www.f2er.com/swift/320649.htmlThe template for Radio buttons in the Interface Builder object library is now implemented as individual NSButton objects,rather than the older NSMatrix,which is discouraged on OS X v10.8 and later. Radio buttons automatically act as a group (selecting one button will unselect all other related buttons) when they have the same superview and -action method. (16965941)
所以拖动单个单选按钮，并确保您将它们连接到同一个插座！
