error: /Users/**/Documents/workspace/***/clean_right_normal.png: No such file or directory

假如确定路径下图片存在，或确定路径是在错误的路径下查找图片，解决办法是： 

Delete the png to "Copy Bundle Ressources" :

参见：http://stackoverflow.com/questions/15069834/deleted-default-png-now-build-failed