iOS 对象转字典

CGObjectToDictionary.h

#import <Foundation/Foundation.h>
@interface CGObjectToDictionary : NSObject
+ (NSDictionary*)getObjectData:(id)obj;
@end

CGObjectToDictionary.m

#import "CGObjectToDictionary.h"
#import <objc/runtime.h>
@implementation CGObjectToDictionary
+ (NSDictionary*)getObjectData:(id)obj{
    NSMutableDictionary *dic = [NSMutableDictionary dictionary];
    unsigned int propsCount;
    objc_property_t *props = class_copyPropertyList([obj class], &propsCount);//获得属性列表
    for(int i = 0;i < propsCount; i++){
        objc_property_t prop = props[i];
        NSString *propName = [NSString stringWithUTF8String:property_getName(prop)];//获得属性的名称
        id value = [obj valueForKey:propName];//kvc读值
        if(value == nil){
            value = [NSNull null];
        }else{
            value = [self getObjectInternal:value];//自定义处理数组，字典，其他类
        }
        [dic setObject:value forKey:propName];
    }
    return dic;
}

+ (id)getObjectInternal:(id)obj{
    if([obj isKindOfClass:[NSString class]] || [obj isKindOfClass:[NSNumber class]] || [obj isKindOfClass:[NSNull class]]) {
        return obj;
    }
    if([obj isKindOfClass:[NSArray class]]) {
        NSArray *objarr = obj;
        NSMutableArray *arr = [NSMutableArray arrayWithCapacity:objarr.count];
        for(int i = 0;i < objarr.count; i++) {
            [arr setObject:[self getObjectInternal:[objarr objectAtIndex:i]] atIndexedSubscript:i];
        }
        return arr;
    }
    if([obj isKindOfClass:[NSDictionary class]]) {
        NSDictionary *objdic = obj;
        NSMutableDictionary *dic = [NSMutableDictionary dictionaryWithCapacity:[objdic count]];
        for(NSString *key in objdic.allKeys){
            [dic setObject:[self getObjectInternal:[objdic objectForKey:key]] forKey:key];
        }
        return dic;
    }
    return [self getObjectData:obj];
}
@end