Issue in converting NSDictionary to json string, replacing / with \/

问题

i want to convert NSDictionary to json string.everything is working fine, i have a small issue that is described as follows: I have a following code for conversion of NSDictionary to NSString:

-(NSString *)dictToJson:(NSDictionary *)dict
{
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:nil];
   return  [[NSString alloc] initWithBytes:[jsonData bytes] length:[jsonData length] encoding:NSUTF8StringEncoding];
}

I am calling the method as:

NSLog(@"%@", [self dictToJson:@{@"hello" : @"21/11/2014 10:07:42 AM"}]);

following is the output of this NSLog:

{
  "hello" : "21\/11\/2014 10:07:42 AM"
}

I am expecting following output, how can i achieve it:

{
      "hello" : "21/11/2014 10:07:42 AM"
}

it can be done by using stringByReplacingOccurrencesOfString method, but i don't want this to use. is there any other way to achieve the same?

回答1:

Converting JSON object to String will escape the forward slash. That is why the back slash is added in your result.

If you convert the string back to JSON object and logged the object, you can see the result as expected. Thus you can verify, there is nothing wrong with the string.

回答2:

Nsdictionary - to - string

NSError * err;
NSData * jsonData = [NSJSONSerialization dataWithJSONObject:response options:0 error:&err];
NSString * myString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

string - to - NSDictionary

NSError * err;
NSDictionary * response = (NSDictionary *)[NSJSONSerialization JSONObjectWithData:[NSData dataFromString:str] options:NSJSONReadingMutableContainers error:&err];

回答3:

Try this,

NSData *json = [NSJSONSerialization dataWithJSONObject:dict
                                               options:0
                                                 error:&error];
NSString *jsonString = [[NSString alloc] initWithData:json encoding:NSUTF8StringEncoding];
// This will be the json string in the preferred format 
jsonString = [jsonString stringByReplacingOccurrencesOfString:@"\\/" withString:@"/"];

// And this will be the json data object 
NSData *processedData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

回答4:

Convert to response to Data with option PrettyPrinted and then convert Data to string using utf8 encoding Code :

    NSDictionary *dictResponse = responseObject[0];

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dictResponse options:NSJSONWritingPrettyPrinted error:nil];


    NSString * myString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

回答5:

add this

 -(NSString*) bv_jsonStringWithPrettyPrint:(BOOL) prettyPrint;  




-(NSString *)dictToJson:(NSDictionary *)dict {

     NSData *jsonData = [NSJSONSerialization dataWithJSONObject: dict
                                                   options:(NSJSONWritingOptions)    (prettyPrint ? NSJSONWritingPrettyPrinted : 0)
                                                     error:&error];

     if (!jsonData) {
        NSLog(@"bv_jsonStringWithPrettyPrint: error: %@", error.localizedDescription);
        return @"{}";
     } else {
        return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
     } 

 }

refer this Generate JSON string from NSDictionary in iOS

来源：https://stackoverflow.com/questions/27054352/issue-in-converting-nsdictionary-to-json-string-replacing-with

标签

objective-c

json

nsjsonserialization