ios格式说明符：如何在iOS 4.2中使用NSLog 0x％x

Question

 NSMutableArray *foo = [NSMutableArray arrayWithCapacity:12];
 NSLog(@" foo is 0x%x", foo);  // worked in XCode 4.0 to return the hex address of this variable     

现在它给出了编译器警告：

转换指定类型'unsigned int'但参数的类型为'NSMutableArray'

如何获得像“foo是0x53a6d0”这样的输出？

Answer 1

我找到了答案（有30个字符）：％p