Re: How long did Nolans Batman actually fight crime?(SPOILERS)
I don't know why there's such a raging debate over it. Nolan's wasn't trying to be subtle here. When Blake says the night Dent died was the last time Batman was seen, Nolan's saying that's the last time Bruce donned the cape and cowl.
Bruce also said to Gordon in the hospital "The Batman wasn't needed any more. We won", to which Gordon replied "Based on a lie". It's blatantly obvious to me that once Harvey died a hero Batman was put out to pasture.
"Sometimes I remember it one way. Sometimes another. If I'm going to have a past, I prefer it to be multiple choice!"
- The Joker