Update README.md

Author: Zepo

README.md

@@ -1,5 +1,5 @@
 # MLeaksFinder
-MLeaksFinder helps you find memory leaks in your iOS apps at develop time. It can automatically find leaks in UIView and UIViewController objects, present alert with the leaked object in its View-ViewController stack when leaks happening. More over, it can try to find a retain cycle for the leaked object. Besides finding leaks in UIView and UIViewController objects, developers can also extend it to find leaks in other kinds of objects.
+MLeaksFinder helps you find memory leaks in your iOS apps at develop time. It can automatically find leaks in UIView and UIViewController objects, present alert with the leaked object in its View-ViewController stack when leaks happening. More over, it can try to find a retain cycle for the leaked object using [FBRetainCycleDetector](https://github.com/facebook/FBRetainCycleDetector/tree/master/FBRetainCycleDetector). Besides finding leaks in UIView and UIViewController objects, developers can extend it to find leaks in other kinds of objects.
 
 # Communication
 QQ group: 482121244
@@ -23,6 +23,15 @@ Memory Leak
 
 For the above example, we are sure that objects of `MyTableViewController`, `UITableView`, `UITableViewWrapperView` are deallocated successfully, but not the objects of `MyTableViewCell`.
 
+MLeaksFinder can also try to find a retain cycle for the leaked object using FBRetainCycleDetector.
+```
+Retain Cycle
+(
+    "-> MyTableViewCell ",
+    "-> _callback -> __NSMallocBlock__ "
+)
+```
+
 ## Mute Assertion
 If your class is designed as singleton or for some reason objects of your class should not be dealloced, override `- (BOOL)willDealloc` in your class by returning NO.
 ```objc