IOS development class_copyPropertyList and class_copyIvarList differences

Class_copyPropertyList: Gets the class property variables by the class name.

Class_copyIvarList: Gets the instance variables of a class by its name.

In other words:

Class_copyPropertyList gets variables that are modified by @Property,

Class_copyIvarList gets the variables that class_copyPropertyList modifies and that are defined inside the @implementation inside the M file

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface Model : NSObject

@property (nonatomic,copy) NSString *sex;
@property (nonatomic,copy) NSString *name;
@property (nonatomic,assign) NSInteger age;
@property (nonatomic,strong) NSDictionary *imgCode;

@end

NS_ASSUME_NONNULL_END
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#import "Model.h"

@interface Model()

@property (nonatomic,copy) NSString *Id;

@end

@implementation Model
{
    NSInteger _index;
}

@end
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#import "LGTestViewController.h" #import "Model.h" @interface LGTestViewController () @end @implementation LGTestViewController - (void)viewDidLoad { [super viewDidLoad]; // Unsigned int propertiesCount = 0; unsigned int ivarsCount = 0; objc_property_t *properties = class_copyPropertyList([Model class], &propertiesCount); Ivar *ivars = class_copyIvarList([Model class], &ivarsCount); NSLog(@"propertiesCount = %u,ivarsCount = %u",propertiesCount,ivarsCount); //propertiesCount = 5,ivarsCount = 6 }Copy the code