The use of NSBundle!

First lock the link:

In this section, the author tell us how to use a Bundle ,But when I use the Bundle! I had a problem……

I delete the image or other resource (or changed) in the Xcode,then i run the code,the app would not change!!

eg: I copy a sqlite file from the Xcode to the app, when I change the file in the workspace , the app in the simulator 

is not change!!

Finaly: I fixed it by changed the ****.app this bundle in : ……/Users/appxy_dev_056/Library/Developer/Xcode/DerivedData/PeriodPal-brninsdxsnedjoejuhpqlgbklbev/Build/Products