alertView doesn't show in real machine equipment

[liuchunlao]

thanks for your Library iOS-custom-alerview .
it runs well in The simulator，but the alertView doesn't appear in real machine equipment（iPhone 6），and i Revised one line of code in CustomIOSAlertView.m

[[[[UIApplication sharedApplication] windows] lastObject] addSubview:self];

everything is ok now, so I think this maybe a small bug.