Objective-C＆gt;捕获内存中的对象地址

Question

如何在代码中的某个位置捕获对象的地址？ 例如：

NSString * aString = @"bla bla";
//what is the current address of aString. i.e to which address in memory does it currently point to
aString = @"la la la";
//what is the current address of aString.

Answer 1

示例：

NSString *temp = @"123";

uintptr_t ptrAddress = (uintptr_t) temp;

NSLog(@"%@ %p %lu", temp, temp, ptrAddress);

控制台：

  

2013-07-11 11:51:20.796 asd [6474：907] 123 0x17985c 1546332

它可能对您有用 - NSPointerArray（iOS 6 +）

Answer 2

这很简单，只需这样做：

NSLog(@"%p", aString);

这是打印指针的格式规范。