Model 转换成 nsdictionary

#import <Foundation/Foundation.h>

@interface PrintObject : NSObject

//通过对象返回一个NSDictionary，键是属性名称，值是属性值。

+ (NSDictionary*)getObjectData:(id)obj;

//将getObjectData方法返回的NSDictionary转化成JSON

+ (NSData*)getJSON:(id)obj options:(NSJSONWritingOptions)options error:(NSError**)error;

//直接通过NSLog输出getObjectData方法返回的NSDictionary

+ (void)print:(id)obj;

@end

#import "PrintObject.h"

#import <objc/runtime.h>

@implementation PrintObject

+ (NSDictionary*)getObjectData:(id)obj

{

    NSMutableDictionary *dic = [NSMutableDictionarydictionary];

    unsignedint propsCount;

    objc_property_t *props =class_copyPropertyList([obj class], &propsCount);

    for(int i =0;i < propsCount; i++)

    {

        objc_property_t prop = props[i];

        

        NSString *propName = [NSStringstringWithUTF8String:property_getName(prop)];

        id value = [objvalueForKey:propName];

        if(value ==nil)

        {

            value = [NSNullnull];

        }

        else

        {

            value = [selfgetObjectInternal:value];

        }

        [dic setObject:valueforKey:propName];

    }

    return dic;

}

+ (void)print:(id)obj

{

    NSLog(@"%@", [selfgetObjectData:obj]);

}

+ (NSData*)getJSON:(id)obj options:(NSJSONWritingOptions)options error:(NSError**)error

{

    return [NSJSONSerializationdataWithJSONObject:[selfgetObjectData:obj] options:optionserror:error];

}

+ (id)getObjectInternal:(id)obj

{

    if([objisKindOfClass:[NSStringclass]]

       || [obj isKindOfClass:[NSNumberclass]]

       || [obj isKindOfClass:[NSNullclass]])

    {

        return obj;

    }

    

    if([objisKindOfClass:[NSArrayclass]])

    {

        NSArray *objarr = obj;

        NSMutableArray *arr = [NSMutableArrayarrayWithCapacity:objarr.count];

        for(int i =0;i < objarr.count; i++)

        {

            [arr setObject:[selfgetObjectInternal:[objarr objectAtIndex:i]] atIndexedSubscript:i];

        }

        return arr;

    }

    

    if([objisKindOfClass:[NSDictionaryclass]])

    {

        NSDictionary *objdic = obj;

        NSMutableDictionary *dic = [NSMutableDictionarydictionaryWithCapacity:[objdic count]];

        for(NSString *keyin objdic.allKeys)

        {

            [dic setObject:[selfgetObjectInternal:[objdic objectForKey:key]] forKey:key];

        }

        return dic;

    }

    return [selfgetObjectData:obj];

}

@end