JSON_HELPER

 1 //
 2 //  JSON HELPER.h
 3 //  JSON helper
 4 //
 5 //  Created by 彭威 on 15/7/21.
 6 //  Copyright (c) 2015年 biophy.nju.edu.cn. All rights reserved.
 7 //
 8 
 9 #import <Foundation/Foundation.h>
10 #import <objc/runtime.h>
11 @interface JSON_HELPER : NSObject
12 @property (nonatomic,strong) NSDateFormatter *dateFormatter;
13 - (NSData *)dataFromObject:(id) obj;
14 @end
15 
16 
17 //
18 //  JSON HELPER.m
19 //  JSON helper
20 //
21 //  Created by 彭威 on 15/7/21.
22 //  Copyright (c) 2015年 biophy.nju.edu.cn. All rights reserved.
23 //
24 
25 #import "JSON_HELPER.h"
26 
27 
28 @implementation JSON_HELPER
29 
30 
31 - (NSData *)dataFromObject:(id)obj{
32     return [NSJSONSerialization dataWithJSONObject:[self dicFromObject:obj] options:NSJSONWritingPrettyPrinted error:nil];
33 }
34 - (id) dicFromObject:(id) obj
35 {
36     if (!obj) {
37         return nil;
38     }
39     if([obj isKindOfClass:[NSString class]]){
40         return obj;
41     }else  if ([obj isKindOfClass:[NSDate class]]){
42         return [self.dateFormatter stringFromDate:obj];
43     }else if ([obj isKindOfClass:[NSNumber class]]){
44         return [NSString stringWithFormat:@"%@",obj];
45     }else if ([obj isKindOfClass:[NSArray class]]) {
46         NSMutableArray *jsonArr = [[NSMutableArray alloc] init];
47         for (id subObj in (NSArray *)obj) {
48             [jsonArr addObject:[self dicFromObject:subObj]];
49         }
50         return jsonArr;
51     } else if ([obj isKindOfClass:[NSDictionary class]]){
52         NSMutableDictionary *jsonDic = [[NSMutableDictionary alloc] init];
53         NSArray *key = [(NSDictionary *)obj allKeys];
54         for (NSString *subObjKey in key) {
55             id value = [self dicFromObject:obj[subObjKey]];
56             [jsonDic setValue:value forKey:subObjKey];
57         }
58         return jsonDic;
59     }else{
60         NSMutableDictionary *jsonDic = [[NSMutableDictionary alloc] init];
61         u_int count;
62         objc_property_t* properties = class_copyPropertyList([obj class], &count);
63         for (int i = 0; i < count ; i++) {
64             const char* propertyName = property_getName(properties[i]);
65             NSString *propName = [NSString stringWithCString:propertyName encoding:NSUTF8StringEncoding];
66             id propValue = [obj valueForKey:propName];
67             id propJsonValue = [self dicFromObject:propValue];
68             [jsonDic setValue:propJsonValue forKey:propName];
69         }
70         free(properties);
71         return jsonDic;
72         
73     }
74 }
75 - (NSDateFormatter *)dateFormatter{
76     if (!_dateFormatter) {
77         _dateFormatter = [[NSDateFormatter alloc]init];
78         [_dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
79     }
80     return _dateFormatter;
81 }
82 @end