//
struct Student_IMPL {
Class isa;
int _no;
int _age;
};
@interface Student : NSObject
{
@public
int _no;
int _age;
// double num;
// int count;
char go;
char go1;
char go2;
char go3;
char go4;
char go5;
char go6;
}
@end
@implementation Student
@end
int main(int argc, char * argv[]) {
NSString * appDelegateClassName;
@autoreleasepool {
appDelegateClassName = NSStringFromClass([AppDelegate class]);
Student *stu = Student.new;
stu->_no = 4;
stu->_age = 43;
struct Student_IMPL *stuIMP = (__bridge struct Student_IMPL*)stu;
NSLog(@"%d %d",stuIMP->_age,stuIMP->_no);
NSLog(@"Student类大小 %ld",class_getInstanceSize([Student class]));
NSLog(@"Student类大小 %ld",class_getInstanceSize([NSObject class]));
// 类对象
Class objClass1 = [stu class];
Class objClass2 = [Student class];
Class objClass3 = object_getClass(stu);
}
return 0;
}
2020-05-28 16:36:13.547553+0800 SDK2.0.0[46267:6736820] 43 4
2020-05-28 16:36:13.548062+0800 SDK2.0.0[46267:6736820] Student类大小 24
2020-05-28 16:36:13.548184+0800 SDK2.0.0[46267:6736820] Student类大小 8
(lldb) p objClass1
(Class) $0 = Student
(lldb) p/x objClass1
(Class) $1 = 0x0000000101de1ae0 Student
(lldb) p/x objClass2
(Class) $2 = 0x0000000101de1ae0 Student
(lldb) p/x objClass3
(Class) $3 = 0x0000000101de1ae0 Student
(lldb) p stu
(Student *) $4 = 0x0000600003cb2860
(lldb) p/x stu
(Student *) $5 = 0x0000600003cb2860
(lldb)
