Yes, I knew, I am SO stupid, I should Google it before I started to change the XCode project name. It cost me a whole day! What a joke.

All right, if you are looking for the correct way to change your application’s name show on the iPhone main screen. You need follow my steps.

1. Scroll the left “Groups & Files” panel to the top(Where you put it, I putted it in the left.), and double-click your project name. This will lead us to step 2.
2. In the Build tab, find the configuration dropdown list, select “All configurations”(Usually, on the top), and then type “Product Name”(It’s not case sensitive, remember the space) in the search box next to the dropdown list.
3. Type whatever name you like in the right side field, and then close it and go to step 4.
4. Choose Build->Clean all targets, then rebuild your project, It’s done!

Remember! Do NOT change your target or add your own target! That’s the wrong way, and will cause code sign failure, and it’s hard to repair!

God, Damn you Apple, you should post a tutorial for the developer. Now I did it for you, and you should pay me!