How to copy apps in my iphone into my itunes library?

I updated my iphone into the latest iphone software… Then i uninstalled my itunes then i tried adding new apps into my phone but it says -- "all existing apps and their data on the iphone will be replaced from this itunes library"

please help? I don't want them to be replaced, i wanted to add some more apps!

"then i uninstalled my itunes" What does that mean? Why would you do that?

You are telling it to Sync with a new library. It is telling you that you have things on the phone that are not in the library. If you go ahead and sync with the new library it will duplicate the new library on the phone so they are both synchronised.

You can buy the apps from the App Store on the phone.
You can start a new library and re-download everything.
You can find the old library and continue syncing with that.

  • Itunes won't copy apps to iphone? It is the 1st time i own an iphone so i don't know much abt it lol. I was lazy to dwnld all the apps so i synced my iphone to my sister's laptop (using her apple id) to steal all her apps lol. Then i tried to sync my iphone back to my laptop (I downloaded a few apps) but it won't copy the apps to my iphone (stuck at will install in itunes). Why and how to fix? My english is bad I know.
  • Is there anyway i can copy or move the pictures on my photo library ( iphone) to the computer? My iphone doesn't appear on on my computer. It only appears on itunes and i can't find a solution. I have so many problems with the phone and i desperatley need to move my pics to my computer because i hadnt backed it up for a long time. And i can't import it because like i said the phone doesn't appear in the connected devices on my computer no matter how long i wait.
  • Is it possible to not have apps saved in your iTunes library? I have tonnes of apps on my iPhone, but why do they have to be on my laptop's iTunes library? It's not as if I can use the apps on my laptop! If I just delete all my apps in iTunes, will they be removed from my phone? Does the app need to even be in my library? If not, how would I be able to stop iTunes from automatically downloading them and waste all of my memory?
  • If i plug my old iphone into a new itunes library what will happen? I have my iphone, and I got a new itunes account on my new computer for other reasons. If i plug my old iphone in, will it erase all my data and text messages and photos and apps? All i want to do is download music off of my phone to the computer for other reasons also. But if i plug it in, will everything be gone?