blocks|key|2349545|text|这是一个棘手的问题，因为你唯一能放入JSON的数据是简单的对象(想想NSString，NSArray，NSNumber…)而不是自定义类或标量类型。为什么？如果不构建各种条件语句来将所有这些数据类型包装到这些类型的对象中，解决方案将类似于：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2349546|//at+the+top…
#import+<objC/runtime.h>

++++NSMutableDictionary+*muteDictionary+=+[NSMutableDictionary+dictionary];

++++id+YourClass+=+objc_getClass("YOURCLASSNAME");
++++unsigned+int+outCount,+i;
++++objc_property_t+*properties+=+class_copyPropertyList(YourClass,+&outCount);
++++for+(i+=+0;+i+<+outCount;+i%2B%2B)+{
++++++++objc_property_t+property+=+properties[i];
++++++++NSString+*propertyName+=+[NSString+stringWithCString:property_getName(property)+encoding:NSUTF8StringEncoding];
++++++++SEL+propertySelector+=+NSSelectorFromString(propertyName);
++++++++if+([classInstance+respondsToSelector:propertySelector])+{
++++++++++++[muteDictionary+setValue:[classInstance+performSelector:propertySelector]+forKey:propertyName];
++++++++}
++++}
++++NSError+*jsonError+=+nil;
++++NSData+*jsonData+=+[NSJSONSerialization+dataWithJSONObject:muteDictionary+options:0+error:&jsonError];|code-block|syntax|javascript|2349547|这很棘手，因为我之前已经说过了。如果你有任何标量类型或自定义对象，整个事情就会崩溃。如果这样的事情真的很重要，我建议投入时间，看看Ricard的链接，这些链接允许您查看属性类型，这些属性类型有助于将值包装到NSDictionary-safe对象中所需的条件语句。|2349548|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This is a tricky one because the only data you can put into JSON are straight up simple objects (think NSString, NSArray, NSNumber…) but not custom classes or scalar types. Why? Without building all sorts of conditional statements to wrap all of those data types into those type of objects, a solution would be something like:

<pre><code>//at the top…
#import &lt;objC/runtime.h&gt;

 NSMutableDictionary *muteDictionary = [NSMutableDictionary dictionary];

 id YourClass = objc_getClass("YOURCLASSNAME");
 unsigned int outCount, i;
 objc_property_t *properties = class_copyPropertyList(YourClass, &amp;outCount);
 for (i = 0; i &lt; outCount; i++) {
 objc_property_t property = properties[i];
 NSString *propertyName = [NSString stringWithCString:property_getName(property) encoding:NSUTF8StringEncoding];
 SEL propertySelector = NSSelectorFromString(propertyName);
 if ([classInstance respondsToSelector:propertySelector]) {
 [muteDictionary setValue:[classInstance performSelector:propertySelector] forKey:propertyName];
 }
 }
 NSError *jsonError = nil;
 NSData *jsonData = [NSJSONSerialization dataWithJSONObject:muteDictionary options:0 error:&amp;jsonError];
</code></pre>

This is tricky, though because of what I stated before. If you have any scalar types or custom objects, the whole thing comes tumbling down. If it's really critical to get something like this going, I'd suggest looking into investing the time and looking at Ricard's links which allow you to see property types which would assist on the conditional statements needed to wrap the values into NSDictionary-safe objects.

blocks|key|1329942|text|也许这能帮到JLObjectStrip。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1329943|这和雅各布说的一样，但它甚至迭代到了类的属性。这将为您提供字典/数组，然后只需使用sbjson/jsonkit或任何您喜欢的方法来构造json字符串。|1329944|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/joshuaLareta/JLObjectStrip^0|6|D|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

maybe this can help <a href="https://github.com/joshuaLareta/JLObjectStrip" rel="nofollow">JLObjectStrip</a>. 

its the same as what jacob said but it iterates even to the property of the class. this will give you dictionary/array then just use sbjson/jsonkit or what ever you prefer to construct your json string.

blocks|key|1329963|text|现在，您可以使用JSONModel轻松解决此问题。JSONModel是一个基于类来序列化/反序列化对象的库。你甚至可以使用非基于对象的属性，比如int，short和float。它还可以迎合嵌套复杂的JSON。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1329964|反序列化示例。参考您的示例，在头文件中：|BOLD|1329965|#import+"JSONModel.h"

@interface+Person+:+JSONModel+
@property+(nonatomic,+strong)+NSString*+firstname;
@property+(nonatomic,+strong)+NSString*+surname;
@end|code-block|syntax|javascript|1329966|在实现文件中：|1329967|#import+"JSONModelLib.h"
#import+"yourPersonClass.h"

NSString+*responseJSON+=+/*from+somewhere*/;
Person+*person+=+[[Person+alloc]+initWithString:responseJSON+error:&err];
if+(!err)
{
+++NSLog(@"%25@++%25@",+person.firstname,+person.surname):
}|1329968|序列化示例。在实现文件中：|1329969|#import+"JSONModelLib.h"
#import+"yourPersonClass.h"

Person+*person+=+[[Person+alloc]+init];
person.firstname+=+@"Jenson";
person.surname+=+@"Uee";

NSLog(@"%25@",+[person+toJSONString]);|1329970|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/icanzilb/JSONModel^0|20|3|24|5|2A|5|8|9|0|0|0|6|0|0|0|0|0|5|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@$9|14|A|15|B|C]|$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|F|3|G|5|6|7|1D|8|@$9|1E|A|1F|B|H]]|D|@]|E|$]]|$1|I|3|J|5|K|7|1G|8|@]|D|@]|E|$L|M]]|$1|N|3|O|5|6|7|1H|8|@]|D|@]|E|$]]|$1|P|3|Q|5|K|7|1I|8|@]|D|@]|E|$L|M]]|$1|R|3|S|5|6|7|1J|8|@$9|1K|A|1L|B|H]]|D|@]|E|$]]|$1|T|3|U|5|K|7|1M|8|@]|D|@]|E|$L|M]]|$1|V|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]]|W|$X|$5|Y|Z|10|E|$11|12]]]]

Now you can solve this problem easily using <a href="https://github.com/icanzilb/JSONModel" rel="noreferrer">JSONModel</a>. JSONModel is a library that generically serialize/deserialize your object based on Class. You can even use non-nsobject based for property like <code>int</code>, <code>short</code> and <code>float</code>. It can also cater nested-complex JSON.

Deserialize example. By referring to your example, in header file:

<pre><code>#import "JSONModel.h"

@interface Person : JSONModel 
@property (nonatomic, strong) NSString* firstname;
@property (nonatomic, strong) NSString* surname;
@end
</code></pre>

in implementation file:

<pre><code>#import "JSONModelLib.h"
#import "yourPersonClass.h"

NSString *responseJSON = /*from somewhere*/;
Person *person = [[Person alloc] initWithString:responseJSON error:&amp;err];
if (!err)
{
 NSLog(@"%@ %@", person.firstname, person.surname):
}
</code></pre>

Serialize Example. In implementation file:

<pre><code>#import "JSONModelLib.h"
#import "yourPersonClass.h"

Person *person = [[Person alloc] init];
person.firstname = @"Jenson";
person.surname = @"Uee";

NSLog(@"%@", [person toJSONString]);
</code></pre>

blocks|key|2194981|text|试试这个BWJSONMatcher|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2194982|这真的很简单，也很方便。|2194983|...
NSString+*jsonString+=+@"{your-json-string}";
YourValueObject+*dataModel+=+[YourValueObject+fromJSONString:jsonString];

NSDictionary+*jsonObject+=+@{your-json-object};
YourValueObject+*dataModel+=+[YourValueObject+fromJSONObject:jsonObject];
...
YourValueObject+*dataModel+=+instance-of-your-value-object;
NSString+*jsonString+=+[dataModel+toJSONString];
NSDictionary+*jsonObject+=+[dataModel+toJSONObject];
...|code-block|syntax|javascript|2194984|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/BurrowsWang/BWJSONMatcher^0|4|D|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

Try this one <a href="https://github.com/BurrowsWang/BWJSONMatcher" rel="nofollow">BWJSONMatcher</a>

It's really simple as well as convenient.

<pre><code>...
NSString *jsonString = @"{your-json-string}";
YourValueObject *dataModel = [YourValueObject fromJSONString:jsonString];

NSDictionary *jsonObject = @{your-json-object};
YourValueObject *dataModel = [YourValueObject fromJSONObject:jsonObject];
...
YourValueObject *dataModel = instance-of-your-value-object;
NSString *jsonString = [dataModel toJSONString];
NSDictionary *jsonObject = [dataModel toJSONObject];
...
</code></pre>

blocks|key|556797|text|我对我的对象所做的是有一个名为"toDict“的方法，它返回一个nsdictionary。在此方法中，我将需要/想要的所有属性都设置到字典中，例如|type|unstyled|depth|inlineStyleRanges|entityRanges|data|556798|[user+setObject:self.first_name+forKey:@"first_name"];
[user+setObject:self.last_name+forKey:@"last_name"];
[user+setObject:self.email+forKey:@"email"];|code-block|syntax|javascript|556799|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

What i do for my objects is i have a method called "toDict" that return a nsdictionary. IN this method i set all attributes i need/want into the dictionary for example

<pre><code>[user setObject:self.first_name forKey:@"first_name"];
[user setObject:self.last_name forKey:@"last_name"];
[user setObject:self.email forKey:@"email"];
</code></pre>

I'd like to JSON-serialize my own custom classes. I'm working in Objective-C / iOS5.
I'd like something to do the following:

<pre><code>Person* person = [self getPerson ]; // Any custom object, NOT based on NSDictionary
NSString* jsonRepresentation = [JsonWriter stringWithObject:person ];
Person* clone = [JsonReader objectFromJson: jsonRepresentation withClass:[Person Class]];
</code></pre>

It seems that NSJSONSerialization (and several other libraries) require the 'person' class to be based on NSDictionary etc. I want something that will serialize any custom object that I care to define (within reason).

Let's imagine Person.h looks like this:

<pre><code>#import &lt;Foundation/Foundation.h&gt;
@interface Person : NSObject 
@property NSString* firstname;
@property NSString* surname;
@end
</code></pre>

I'd like the generated JSON for an instance to look similar to the following:

<pre><code>{"firstname":"Jenson","surname":"Button"}
</code></pre>

My app uses ARC. I need something that will both serialise and deserialize using objects.

Many thanks.

iOS JSON serialization for NSObject-based classes

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想对我自己的自定义类进行JSON序列化。我在Objective-C / iOS5工作。我想做一些事情来做以下事情：Person* person = [self getPerson ]; // Any custom object, NOT based on NSDictionaryNSString* jsonRepre...

问基于iOS对象的类的NSObject序列化
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