結(jié)論寫在最前面：

數(shù)組元素是struct時，復(fù)制數(shù)組后修改辕坝，以及修改指向數(shù)組元素的變量都不會影響到原來的數(shù)組；元素是class時則會荐健。
詳細(xì)的測試用例一圖清楚明了酱畅。

測試結(jié)果

測試代碼

    class Person : CustomDebugStringConvertible {
        
        var debugDescription: String {
            return "debug:\(age)"
        }
        
        var age : Int = 0
        init(age:Int){
            self.age = age
        }
    }
    
   func forClass() {
        var perArr = [Person]()
        perArr.append(Person(age:12))
        perArr.append(Person(age:13))
        perArr.append(Person(age:14))
        
        print("A:perArr = \(perArr)")
        //perArr = [debug:12, debug:13, debug:14]
        
        var copyArr = perArr
        print("A:copyArr = \(copyArr)")
        //A:copyArr = [debug:12, debug:13, debug:14]
        
        //==============[case 1]=======================
        //操作：對數(shù)組復(fù)制后，修改復(fù)制得到的數(shù)組的元素江场，
        copyArr[1].age = 100
        print("B:copyArr = \(copyArr)")
        //B:copyArr = [debug:12, debug:100, debug:14]
        print("B:perArr = \(perArr)")
        //B:perArr = [debug:12, debug:100, debug:14]
        //結(jié)果：原來數(shù)組的元素也會發(fā)生改變纺酸，兩個輸出結(jié)果里都是'debug:100';所以數(shù)組元素依然是引用
        
        //==============[case 2]=======================
        //操作：新建一個元素，把元素添加到數(shù)組后再修改該元素
        let testP = Person(age:999)
        copyArr.append(testP)
        print("C:copyArr = \(copyArr)")
        //C:copyArr = [debug:12, debug:100, debug:14, debug:999]
        print("A:testP = \(testP)")
        //A:testP = 999
        testP.age = 888
        print("D:copyArr = \(copyArr)")
        //D:copyArr = [debug:12, debug:100, debug:14, debug:888]
        //結(jié)果：數(shù)組的元素也會發(fā)生改變址否，輸出結(jié)果里有'debug:888';所以數(shù)組元素依然是引用
    }

   struct User : CustomDebugStringConvertible {
        var age : Int = 0
        var debugDescription: String {
            return "debug:\(age)"
        }
    }

    func forStruct() {
        var perArr = [User]()
        perArr.append(User(age:12))
        perArr.append(User(age:13))
        perArr.append(User(age:14))
        
        print("A:perArr = \(perArr)")
        //perArr = [debug:12, debug:13, debug:14]
        
        var copyArr = perArr
        print("A:copyArr = \(copyArr)")
        //A:copyArr = [debug:12, debug:13, debug:14]
        
        //==============[case 1]=======================
        //操作：對數(shù)組復(fù)制后餐蔬，修改復(fù)制得到的數(shù)組的元素，
        copyArr[1].age = 100
        print("B:copyArr = \(copyArr)")
        //B:copyArr = [debug:12, debug:100, debug:14]
        print("B:perArr = \(perArr)")
        //B:perArr = [debug:12, debug:13, debug:14]
        //結(jié)果：原來數(shù)組的元素不會發(fā)生改變佑附，兩個輸出結(jié)果里都是'debug:100'和‘debug:13’
        
        //==============[case 2]=======================
        //操作：新建一個元素樊诺，把元素添加到數(shù)組后再修改該元素
        var testP = User(age:999)
        copyArr.append(testP)
        print("C:copyArr = \(copyArr)")
        //C:copyArr = [debug:12, debug:100, debug:14, debug:999]
        print("A:testP = \(testP)")
        //A:testP = 999
        testP.age = 888
        print("D:copyArr = \(copyArr)")
        //D:copyArr = [debug:12, debug:100, debug:14, debug:999]
        //結(jié)果：數(shù)組的元素不會發(fā)生改變，輸出結(jié)果里還是'debug:999';
    }