Why I am not able to replace the NSMutableString value in foundCharacters method of NSXMLParser in objective c?

Question

I am new in iOS and I am facing the problem regarding to replace the string value in foundCharacters method of NSXMLPerser.

My code is like this

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{  
    myMutableStringassignedObj=[[NSMutableString alloc]initWithString:string];
    NSLog(@"Array String: %@",myMutableStringassignedObj);
    myMutableStringassignedObj = [[myMutableStringassignedObj stringByReplacingOccurrencesOfString:@"&"
                                         withString:@"and"] mutableCopy];//I am changing string like this but it not working
    NSData *data = [myMutableStringassignedObj dataUsingEncoding:NSUTF8StringEncoding];
    responseassigneddict = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
    NSLog(@"JSON DATA = %@",responseassigneddict);
}

Due to the & It's give me null value. Is there is any way to change it. Thanks in Advance!

please give content of string and what you want from that sring. — Narendra Pandey, Nov 14 '16 at 07:11
@NarendraPandey String Content is : Staircase no 3,4,1 lobby area of B & C,passage area and unit no -1502 till 1504 there is no light reliance lift passage area no light. — Muju, Nov 14 '16 at 07:14
I tried using the method `[[myMutableStringassignedObj stringByReplacingOccurrencesOfString:@"&" withString:@"and"] mutableCopy]`. It didn't work for me. So, I tried other method for doing the same. You can check my answer for that — KrishnaCA, Nov 14 '16 at 07:16
Hi, you are not getting `NULL` due to `&` in `NSString`. Please check my answer for clear understanding of your problem :). Feel free to comment for any doubt — KrishnaCA, Nov 14 '16 at 07:35

KrishnaCA · Answer 1 · 2016-11-28T10:21:07.943

2

Replace your string modification method with this

[myMutableStringassignedObj replaceOccurrencesOfString:@"&" withString:@"and" options:NSLiteralSearch range:NSMakeRange(0, myMutableStringassignedObj.length)];

After that, place your string in an NSArray or NSDictionary.

NSArray *array = @[myMutableStringassignedObj];

The problem here is: You are not decoding jsonData from NSData object. jsonData should always start with Array or Dictionary. Here, you converted NSString into NSData and trying to decode that using NSJSONSerialization. So, you are getting an error due to that. I checked the error code.

So, to decode the NSData into a jsonObject/Foundation Object, you are supposed to place your String into an NSArray or NSDictionary and then convert it in to NSData using NSJSONSerialization

NSData *data = [NSJSONSerialization dataWithJSONObject:array options:NSJSONWritingPrettyPrinted error:nil];
NSError *error;
id responseassigneddict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
NSLog(@"JSON DATA = %@",responseassigneddict);

Edit:

As discussed in comments, please use an XMLParser library to solve this.

edited Nov 28 '16 at 10:21

answered Nov 14 '16 at 07:14

KrishnaCA

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Nothing Happen. – Muju Nov 14 '16 at 07:16
I figured out your problem – KrishnaCA Nov 14 '16 at 07:20
Please tell me. – Muju Nov 14 '16 at 07:22
Please check my answer – KrishnaCA Nov 14 '16 at 07:26
@muju it's encoding issue. Try my solution once . Hope it will work. – Rubiya Faniband Nov 14 '16 at 08:23
@KrishnaCA I have used your code but it give me error "this class is not key value coding-compliant for the key Series." – Muju Nov 28 '16 at 05:11
@Muju, show me your string once. Atleast, the format your string is in. – KrishnaCA Nov 28 '16 at 05:34
@KrishnaCA Please see the Image that is my string and after "Staff has left. F" I am getting & that's why it get crash. – Muju Nov 28 '16 at 05:39
@Muju Try pasting your Json string in http://codebeautify.org/jsonviewer and check whether the json is valid or not once – KrishnaCA Nov 28 '16 at 05:45
@KrishnaCA I am using XMLParser. How to see it in JSON Viewer. – Muju Nov 28 '16 at 05:47
@KrishnaCA Please see the Image now. – Muju Nov 28 '16 at 05:52
@Muju, The string you are getting. Not the xml data. Print the NSString in your console and paste it in jsonviewer once. – KrishnaCA Nov 28 '16 at 05:53
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/129195/discussion-between-krishnaca-and-muju). – KrishnaCA Nov 28 '16 at 05:57
@KrishnaCA Thanks for your help by using xmlconverter in I am able to done this. – Muju Nov 28 '16 at 09:17

score 0 · Answer 2 · answered Nov 14 '16 at 07:12

0

You can do it something like,

  NSString *string = @"hello & hello";

 NSString *result = [string stringByReplacingOccurrencesOfString:@"&" withString:@"and"];

NSLog(@"result : %@",result);

there is no meed of convert it to mutable string!

answered Nov 14 '16 at 07:12

Ketan Parmar

27,092
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I am using Mutable String that why I need to convert it. – Muju Nov 14 '16 at 07:17
Can you please answer my question http://stackoverflow.com/questions/43539307/how-to-post-string-with-special-character-and-thai-language-using-xml-parsing-in – Muju Apr 22 '17 at 06:42

score 0 · Answer 3 · answered Nov 14 '16 at 07:28

 NSMutableString *String = [[NSMutableString alloc]initWithString:@"B&c"];

    [String replaceOccurrencesOfString:@"&" withString:@"and" options:NSRegularExpressionSearch range:NSMakeRange(0, String.length)];
    NSLog(@"string after replacing %@",String);

Output:

string after replacing `Bandc`

Rubiya Faniband · Answer 4 · 2016-11-14T08:48:13.393

0

It's a issue of encoding the data which is having special character. Use below line code directly instead of replacing & or any Special character.

NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLKMNOPQRSTUVWXYZ0123456789"];

NSString *encodedData = [myMutableStringassignedObj stringByAddingPercentEncodingWithAllowedCharacters:set]];

NSData *data = [encodedData dataUsingEncoding:NSUTF8StringEncoding];

edited Nov 14 '16 at 08:48

answered Nov 14 '16 at 07:34

Rubiya Faniband

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I declare NSCharacterSet *set; in .h file and then write your code from NSString. – Muju Nov 14 '16 at 08:58
use this NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLKMNOPQRSTUVWXYZ0123456789"]; and remove the NSCharacterSet object you declared. – Rubiya Faniband Nov 14 '16 at 08:59
Now it give me Null value – Muju Nov 14 '16 at 09:02
first convert it into data and take it in dictionary . NSData *data = [NSJSONSerialization dataWithJSONObject:[NSArray arrayWithObject:myMutableStringassignedObj] options:NSJSONWritingPrettyPrinted error:nil]; NSError *error; id responseassigneddict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error]; NSLog(@"JSON DATA = %@",responseassigneddict); – Rubiya Faniband Nov 14 '16 at 09:18
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/128039/discussion-between-rubiya-faniband-and-muju). – Rubiya Faniband Nov 14 '16 at 09:30

Why I am not able to replace the NSMutableString value in foundCharacters method of NSXMLParser in objective c?

4 Answers4