NSMutableDictionary thread safety

Question

I have a question on thread safety while using NSMutableDictionary.

The main thread is reading data from NSMutableDictionary where:

Answer 1

Nowadays you'd probably go for @synchronized(object) instead.

...
@synchronized(dictionary) {
    [dictionary setObject:image forKey:name];
}
...
@synchronized(dictionary) {
    [dictionary objectForKey:key];
}
...
@synchronized(dictionary) {
    [dictionary removeObjectForKey:key];
}

No need for the NSLock object any more