我想覆盖我的对象的描述方法,以便能够打印所有声明的属性的值。我知道我可以通过逐个附加所有值来实现这一点,但是如果你有很多属性,有时候这很费时间。
我想知道是否有一种简单的方法可以通过Objective-C的运行时功能获得帮助?
答案 0 :(得分:6)
您是否尝试过this solution?
#import <Foundation/Foundation.h>
#import <objc/runtime.h>
@interface NSObject (PropertyListing)
// aps suffix to avoid namespace collsion
// ...for Andrew Paul Sardone
- (NSDictionary *)properties_aps;
@end
@implementation NSObject (PropertyListing)
- (NSDictionary *)properties_aps {
NSMutableDictionary *props = [NSMutableDictionary dictionary];
unsigned int outCount, i;
objc_property_t *properties = class_copyPropertyList([self class], &outCount);
for (i = 0; i < outCount; i++) {
objc_property_t property = properties[i];
NSString *propertyName = [[[NSString alloc] initWithCString:property_getName(property)] autorelease];
id propertyValue = [self valueForKey:(NSString *)propertyName];
if (propertyValue) [props setObject:propertyValue forKey:propertyName];
}
free(properties);
return props;
}
@end