ObjC获取Class类名

iOS的获取ObjC类名，有几种方法：

概述

• 获取Class名字=类名
  • 方式
    • 适用于=当输入类型是：Class
      • NSStringFromClass
        • 返回：NSString*
      • class_getName
        • 返回：const char*
    • 适用于=当输入类型是：Instance
      • [someInstance className]
        • 返回：NSString*
    • 适用于=当输入类型是：id(Class/Instance/...)
      • object_getClassName
        • 返回：const char*

详解

• 适用于：Class
  • NSStringFromClass
    • 定义

      NSString * NSStringFromClass(Class aClass);
      

    • 举例

      (lldb) po NSStringFromClass($x0)
      _NSXPCConnectionExportInfo
      

  • class_getName
    • 定义：

      const char * class_getName(Class cls);
      

• 适用于：Instance=Object

  • className

    • 定义：

      @property(readonly, copy) NSString *className;
      

    • 举例

      • 当输入参数类型错误时，无法使用

        • 当前参数是Class=类，不是实例Instance，所以调用报错

          (lldb) po $x0
          _NSXPCConnectionExportInfo
          
          (lldb) po [$x0 className]
          error: Execution was interrupted, reason: Attempted to dereference an invalid ObjC Object or send it an unrecognized selector.
          The process has been returned to the state before expression evaluation.
          

• 适用于：id（Class/Instance/...）

  • object_getClassName

    • 定义

      const char * object_getClassName(id obj);
      

    • 举例

      • 举例1

        (lldb) po (char*)object_getClassName(0x0000000286379c00)
        "AWESearchUser"
        

      • 举例2

        (lldb) po 0x00000001341cc0e0
        <AWEInviteSearchViewController: 0x1341cc0e0>
        
        (lldb) po (char*)object_getClassName(0x00000001341cc0e0)
        "AWEInviteSearchViewController_Hmd_Prefix_"
        

      • 举例3

        (lldb) po (char*)object_getClassName(0x00000002813e74e0)
        "__NSDictionaryM"
        

      • 举例4

        (lldb) po object_getClassName($x0)
        0x00000001874cf168
        
        (lldb) po (char*)0x00000001874cf168
        "_NSXPCConnectionExportInfo"
        

使用举例

AADeviceInfo

• objc_alloc_init的条件判断的断点的写法
  • 判断是否是类AADeviceInfo
    • 输入参数类型：Class
      • NSStringFromClass

        (bool)[NSStringFromClass($x0) isEqualToString: @"AADeviceInfo"]
        

      • class_getName

        (int)strcmp((char *)class_getName($x0),"AADeviceInfo")==0
        

      • object_getClassName

        (int)strcmp((char *)object_getClassName($x0),"AADeviceInfo")==0