NSlog(@"Retain count is %ld", CFGetRetainCount((__bridge CFTypeRef)self));
block保环流--->>__weak typeof(AA) bb = AA
__unsafe_unretained typeof(AA) bb =AA
NSlog(@"Retain count is %ld", CFGetRetainCount((__bridge CFTypeRef)self));
block保环流--->>__weak typeof(AA) bb = AA
__unsafe_unretained typeof(AA) bb =AA