IOS 反射机制

#import <Foundation/NSObjCRuntime.h>
#import <objc/runtime.h>

- (NSString *)serializeObject:(id)theObject
{
    NSString *className = NSStringFromClass([theObject class]);
    
    const char *cClassName = [className UTF8String];
    
    id theClass = objc_getClass(cClassName);
    
    unsigned int outCount, i;
    
    objc_property_t *properties = class_copyPropertyList(theClass, &outCount);
    
    NSMutableArray *propertyNames = [[NSMutableArray alloc] initWithCapacity:1];
    
    for (i = 0; i < outCount; i++) {
        
        objc_property_t property = properties[i];
        
        NSString *propertyNameString = [[NSString alloc] initWithCString:property_getName(property) encoding:NSUTF8StringEncoding]; 
        
        [propertyNames addObject:propertyNameString];
        
        [propertyNameString release];
        
        NSLog(@"%s %s\n", property_getName(property), property_getAttributes(property));
        
    }
    
    NSMutableDictionary *finalDict = [[NSMutableDictionary alloc] initWithCapacity:1];
    
    for(NSString *key in propertyNames)
    {
        SEL selector = NSSelectorFromString(key);
        id value = [theObject performSelector:selector];
        
        if (value == nil)
        {
            value = [NSNull null];
        }
        
        [finalDict setObject:value forKey:key];
    }
    
    [propertyNames release];
    
    NSString *retString = [[CJSONSerializer serializer] serializeDictionary:finalDict];
    
    [finalDict release];
    
    return retString;

}