class_copyPropertyList和class_copyIvarList的区别

class_copyPropertyList：

通过类名获得类的属性变量。

class_copyIvarList

通过类名获得类的实例变量。

也就是说：

class_copyPropertyList获得的是由@property修饰过的变量，

class_copyIvarList获得的是class_copyPropertyList修饰的以及在m文件的中@implementation内定义的变量

eg:

//.h

@interface Model : NSObject

@property (nonatomic,copy)NSString *sex;

@property (nonatomic,copy)NSString *name;

@property (nonatomic,assign)NSInteger age;

@property (nonatomic,strong)NSDictionary *imgCode;

@end

//.m

@interface Model ()

@property (nonatomic,copy)NSString *Id;

@end

@implementation Model {

    NSInteger _index;

}

@end

//使用的时候

    unsigned int propertiesCount =0;

    unsigned int ivarsCount =0;

    objc_property_t *properties = class_copyPropertyList(Model, &propertiesCount);

    Ivar *ivars = class_copyIvarList(Model, &ivarsCount);

则 propertiesCount = 5

ivarsCount = 6