有些人只會使用model，而不會解析，有時候不能夠清楚的看到層次，很耽誤事，通過封裝的一個類，可以輕鬆實現Model轉Json或者NSDictionary。

使用方法：

這個MyData類用來儲存Model。

#import <Foundation/Foundation.h>

@interface MyData :NSObject

@property (nonatomic,strong)NSString *name;

@property (nonatomic,strong)NSString *nullString;

@property (nonatomic)int age;

@property (nonatomic)BOOL male;

@property (nonatomic,strong)MyData *objProp;

@property (nonatomic,strong)NSArray *arrProp;

@property (nonatomic,strong)NSDictionary *dicProp;

@end

通過MyData建立一個物件，裡面有各種資料型別，包括陣列，字典等

MyData *main = [[MyDataalloc]init];

    main.name =@"sunyuqiang";

    main.age

   MyData *childOfChild = [[MyDataalloc]init];

    childOfChild.name =@"child of child";

    childOfChild.age = -23;

   MyData *child = [[MyDataalloc]init];

    child.name =@"child";

    child.arrProp =@[@"test",@123, @[@456,@"array in array", childOfChild]];

    main.objProp = child;

    main.dicProp

//輸出Model

NSLog(@"main====%@",main);

使用ModelToJson打印出字典：

//輸出字典

   NSDictionary *dic = [ModelToJsongetObjectData:main];

   NSLog(@"dic==%@", dic);

使用ModelToJson打印出json：

//輸出json

   NSData *jsonData = [ModelToJsongetJSON:mainoptions:NSJSONWritingPrettyPrintederror:nil];

NSString *jsonText = [[NSStringalloc]initWithData:jsonDataencoding:NSUTF8StringEncoding];

   NSLog(@"jsonText===%@", jsonText);

#import <Foundation/Foundation.h>

@interface ModelToJson :NSObject

//通過物件返回一個NSDictionary，鍵是屬性名稱，值是屬性值。

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

//將getObjectData方法返回的NSDictionary轉化成JSON

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

//直接通過NSLog輸出getObjectData方法返回的NSDictionary

+ (void)print:(id)obj;

@end

#import "ModelToJson.h"

#import <objc/runtime.h>

@implementation ModelToJson

+ (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];

        }

        [dicsetObject: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:options error:error];

}

+ (id)getObjectInternal:(id)obj

{

if([objisKindOfClass:[NSStringclass]]

       || [objisKindOfClass:[NSNumberclass]]

       || [objisKindOfClass:[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:[objarrobjectAtIndex:i]]atIndexedSubscript:i];

        }

       return arr;

    }

if([objisKindOfClass:[NSDictionaryclass]])

    {

       NSDictionary *objdic = obj;

NSMutableDictionary *dic = [NSMutableDictionarydictionaryWithCapacity:[objdiccount]];

       for(NSString *keyin objdic.allKeys)

        {

            [dicsetObject:[selfgetObjectInternal:[objdicobjectForKey:key]] forKey:key];

        }

       return dic;

    }

   return [selfgetObjectData:obj];

}

@end