copy 类中的 property
/**
* Describes the properties declared by a class.
*
* @param cls The class you want to inspect.
* @param outCount On return, contains the length of the returned array.
* If \e outCount is \c NULL, the length is not returned.
*
* @return An array of pointers of type \c objc_property_t describing the properties
* declared by the class. Any properties declared by superclasses are not included.
* The array contains \c *outCount pointers followed by a \c NULL terminator. You must free the array with \c free().
*
* If \e cls declares no properties, or \e cls is \c Nil, returns \c NULL and \c *outCount is \c 0.
*/
OBJC_EXPORT objc_property_t *class_copyPropertyList(Class cls, unsigned int *outCount)
OBJC_AVAILABLE(10.5, 2.0, 9.0, 1.0);
返回 property 的 name
/**
* Returns the name of a property.
*
* @param property The property you want to inquire about.
*
* @return A C string containing the property's name.
*/
OBJC_EXPORT const char *property_getName(objc_property_t property)
OBJC_AVAILABLE(10.5, 2.0, 9.0, 1.0);
实战 通过类名得到类中的属性名
// 通过类名得到类中的属性名
+ (NSArray *)getPropertyNameArrayWithClassName:(NSString *)className {
NSMutableArray *array = [NSMutableArray array];
unsigned int count;
objc_property_t *props = class_copyPropertyList(NSClassFromString(className), &count);
for (int i = 0; i < count; i ++) {
objc_property_t property = props[i];
const char *name = property_getName(property);
NSString *propertyName = [NSString stringWithUTF8String:name];
[array addObject:propertyName];
}
free(props);
return array;
}
