iphone: what libraries or APIs need to be used for

问题:

I am pretty new to iphone development, can any body guide me through with some APIs and libraries which be used for:

1. RAM usage
2. CPU usage

in iPhone

need to do something like this app

回答1:

I just come across this link and I didn't go through in details but It might help you lot.

Let me know if this is something you want.

回答2:

For Battery usage you can implement this notification

UIDeviceBatteryLevelDidChangeNotification 

I am not sure about CPU and Ram usage.