ARC下查看引用计数

ARC下也是可以查看引用计数的

1. 通过CoreFoundation框架API

NSLog(@"Retain Count is %ld ", CFGetRetainCount((__bridge CFTypeRef)self));

控制台打印:

Retain Count is 7

2. 通过KVC

NSLog(@"Retain Count is %@ ", [self valueForKey:@"retainCount"]);

控制台打印:

Retain Count is 7