Results of IOS sending messages to objects that have been released

    NSObject *object = [[NSObject alloc] init];
    NSLog (@ "release before = = =%lu", [object Retaincount]);
    [Object release];
    NSLog (@ "after release = = =%lu", [object Retaincount]);
    Print results in two cases
    /*
     1. Direct crash: Cause the memory of the object is reused.
     2. Before the release = = 1
       released = = 1
       reason: When the last time the release, the system knows that the immediate recovery of memory, there is no need to reduce the Retaincount 1, because no matter minus 1, the object will certainly be recycled, and the object is recycled, Its memory area, including the Retaincount value, also becomes meaningless. Not minus 1. Can reduce the operation of the memory once, accelerate the collection of objects.
     */