Dans AFNetworking code source AFURLSessionManager.m,Pourquoi utiliser NSStringFromSelector (@selector (countOfBytesReceived)) pour forKeyPath dans addObserver: forKeyPath: options: context dans AFNetworking?
(NSURLSessionTask *)task
[task addObserver:self
forKeyPath:NSStringFromSelector(@selector(countOfBytesReceived))
options:NSKeyValueObservingOptionNew
context:NULL];
Pourquoi utiliser "NSStringFromSelector (@selector (countOfBytesReceived))" au lieu de @ "countOfBytesReceived". Strictement
[Quelle approche utiliser pour KVC?] (Https://stackoverflow.com/q/15023832/4244136) – Willeke