#import@interface NSObject (JsonWriting)

- (NSString *)JSONRepresentation;

- (id)JSONValue;

@end

#import "NSObject+JsonWriting.h"

@implementation NSObject (JsonWriting)

- (NSString *)JSONRepresentation

{

NSString *str;

if ([NSJSONSerialization isValidJSONObject:self])

{

NSError *err;

NSData *strData = [NSJSONSerialization dataWithJSONObject:self options:NSJSONWritingPrettyPrinted error:&err];

str = [[NSString alloc] initWithData:strData encoding:NSUTF8StringEncoding];

}

return str;

}

- (id)JSONValue

{

//處理報文

NSError *err;

//判斷是否為json字符串

if ([self isKindOfClass:[NSString class]])

{

NSString *jsonstr = (NSString*)self;

NSString *containString = @":";

NSRange range = [jsonstr rangeOfString:containString];

if (range.location == NSNotFound || [self strNilOrEmpty:jsonstr])

{

return nil;

}

}

else

{

NSString *jsonstr = [[NSString alloc]initWithData:(NSData *)self encoding:NSUTF8StringEncoding];

NSString *containString = @":";

NSRange range = [jsonstr rangeOfString:containString];

if (range.location == NSNotFound || [self strNilOrEmpty:jsonstr])

{

return nil;

}

}

if ([self isKindOfClass:[NSString class]])

{

NSString *jsonstr = (NSString*)self;

NSData *data = [jsonstr dataUsingEncoding:NSUTF8StringEncoding];

id dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&err];

return dict;

}

id dict = [NSJSONSerialization JSONObjectWithData:(NSData *)self options:NSJSONReadingAllowFragments error:&err];

return dict;

}

-(BOOL)strNilOrEmpty:(NSString *)string{

if ([string isKindOfClass:[NSString class]]) {

if (string.length > 0) {

return NO;

}

else {

return YES;

}

}

else {

return YES;

}

}

@end