SBJson库解析（二）NSObject+SBJson

一.NSObject+SBJson.h

1.把objc对象编码成json字符串

通过类别，为NSObject添加新方法：[NSObject JSONRepresentation]

1 @interface NSObject (NSObject_SBJsonWriting)
2 /**
3  虽然定义成NSObject的类别，但仅对NSArray和NSDictionary有效
4  返回：已编码的json对象，或nil
5  */
6 - (NSString *)JSONRepresentation;
7 @end

2.把json对象解析为objc对象

通过类别，为NSString添加新方法：[NSString JSONValue]

1 @interface NSString (NSString_SBJsonParsing)
2 /**
3  返回：NSDictionary或NSArray对象，或nil
4  */
5 - (id)JSONValue;
6 @end

二.NSObject+SBJson.m

导入头文件

1 #import "NSObject+SBJson.h"
2 #import "SBJsonWriter.h"
3 #import "SBJsonParser.h"

1.通过json编写器SBJsonWriter，的stringWithObject: 方法，实现[NSObject JSONRepresentation]编码逻辑

1 @implementation NSObject (NSObject_SBJsonWriting)
 2 
 3 //objc2json
 4 - (NSString *)JSONRepresentation {
 5     SBJsonWriter *writer = [[SBJsonWriter alloc] init];    
 6     NSString *json = [writer stringWithObject:self];
 7     if (!json)
 8         NSLog(@"-JSONRepresentation failed. Error is: %@", writer.error);
 9     return json;
10 }
11 
12 @end

2.通过json解析器SBJsonParser，的objectWithString: 方法，实现[NSString JSONValue]解析逻辑

1 @implementation NSString (NSString_SBJsonParsing)
 2 
 3 //json2objc
 4 - (id)JSONValue {
 5     SBJsonParser *parser = [[SBJsonParser alloc] init];
 6     id repr = [parser objectWithString:self];
 7     if (!repr)
 8         NSLog(@"-JSONValue failed. Error is: %@", parser.error);
 9     return repr;
10 }
11 
12 @end

转载于:https://www.cnblogs.com/xiaodao/archive/2012/02/17/2355946.html

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