I have made Android application a few months ago. The Toast class is very useful for me. I do not need to consider the main Thread and place to show it. Anywhere I can show it and just leave that and it is automatically disappeared.
Toast.makeToast(context, msg, Toast.LENGTH_SHORT).show();
That's it. ^^
What about iPhone? Is there something like the Toast? Just show message and do not need to care about it. It will be automatically disappeared.