Could not insert new outlet connection …
Could not insert new outlet connection ……1.关闭xcode2.进入~/Library/Developer/XCode/DerivedData目
Could not insert new outlet connection ……
1.关闭xcode;
2.进入~/Library/Developer/XCode/DerivedData目录，删除名字为 工程名+一连串字母的文件夹
