iphone开发点滴－Could not launch app - No such file or directory

http://blog.csdn.net/doctorhsly/article/details/8517558

Could not launch app - No such file or directory
解决方法

Disconnect your device. （拔掉机器）
Delete the app from your device. （删除机器上的程序）
Quit xcode (Don't just simply close the window, quit it)（推出xcode，而不是关闭项目窗口）
Delete derived data folder (~/Library/Developer/Xcode/DerivedData/-gbrvhlvwmpiobxdujegtghggrffp - or something like that) （删除电脑上对应的应用程序数据）
Now start Xcode, connect device and run the project. It should work fine.（重启xcode，连接机器，重新运行项目）