Strong reference cycles

A strong reference cycle is where the instances of two classes holds a strong reference to each other, preventing ARC from releasing either instance. Once again, we are not able to use a playground for this example, so we need to create an Xcode project. In this project, we start off by creating two classes named MyClass1_Strong and MyClass2_Strong with the following code:

class MyClass1_Strong {  
    var name = "" 
    var class2: MyClass2_Strong?  
    init(name: String) { 
        self.name = name 
        print("Initializing class1_Strong with name \(self.name)") 
    } 
    deinit { 
        print("Releasing class1_Strong with name \(self.name)") 
    } 
} 
 
class MyClass2_Strong {  
    var name = "" 
    var class1: MyClass1_Strong?  
    init(name: String) { 
        self.name = name 
        print(&quot...