clang: error: linker command failed with exit code 1 (use -v to see invocation)

1.有可能是文件.h导入成.m

2.相同的类导入多次

解决方法

①build phases->compile sources看看.m文件是不是都添加了

②build setting->Other linker Flags改变属性为-ObjC
http://blog.csdn.net/kaizi318/article/details/10362455 http://blog.csdn.net/hengshujiyi/article/details/21182813