在objective-c中，如何获取selfclass和所有superclass的属性列表？

Question

有class个继承自NSObject。

@interface A: NSObject  
 @property(nonatomic, strong) NSNumber* numA;
 @property(nonatomic, strong) NSString* strA;
@end

使用下面的代码很容易得到 A 的属性列表：

unsigned int num_props;
objc_property_t* prop_list;
NSMutableSet* set = [NSMutableSet New];
prop_list = class_copyPropertyList(self, &num_props);
for(unsigned int i = 0; i < num_props; i++) {
  NSString* propName = [NSString stringWithFormat:@"%s", property_getName(prop_list[i])];
 [self customMethod];
}
free(prop_list);
return set;

然后我有一个class B继承自A

@interface B: A
 @property(nonatomic, strong) NSValue* valueB;
 @property(nonatomic, strong) NSArray* arrayB;
@end

我想知道B的所有属性（包括继承自B的属性）。如果我使用上面的方法，我只会得到 valueB 和 arrayB。

如何获得valueB、arrayB和strA、numA？

Answer 1

@implementation A
+ (NSSet *)allPropertys {
    NSMutableSet* result = [NSMutableSet new];
    Class observed = self;
    while ([observed isSubclassOfClass:[A class]]) {
     [self propertyForClass: observed withSet: &result];
     observed = [observed superclass];
    }
   return result;
  }

+ (void)propertyForClass: (Class)class withSet: (NSMutableSet **)result {
  unsigned int num_props;
  objc_property_t* prop_list;
  prop_list = class_copyPropertyList(class, &num_props);

  for(unsigned int i = 0; i < num_props; i++) {
    NSString * propName = [NSString stringWithFormat:@"%s", property_getName(prop_list[i])];
    [class customMethod: propName];
    [*result addObject: propName];
  }
  free(prop_list);
}
@end

在objective-c中，如何获取selfclass和所有superclass的属性列表？

In objective-c, how to get self class and all superclass's properties list?

ios

objective-c

inheritance

properties

runtime