Formatting a String in Objective - C

Question

I'm getting a response from webservice as a string like below one -

brand=company%%samsung@@modelnumber=webmodel%%GT1910@@Sim=Single%%SingleSim@@3g=yes%%Yes@@wifi=yes%%yes(2.1 mbps upto)

I'm confusing that to format my response like below one -

brand=samsung
modelnumber=GT1910
Sim=SingleSim
3g=Yes
wifi=(2.1 mbps upto)

I've tried to remove the special characters (@@ and %%)

specialString = [specialString stringByReplacingOccurrencesOfString:@"@@" withString:@"\n"];
specialString = [specialString stringByReplacingOccurrencesOfString:@"%%" withString:@"\n"];
specialString= [specialString stringByReplacingOccurrencesOfString:@" " withString:@""];

My output was -

brand=company
samsung
modelnumber=webmodel
GT1910
Sim=Single
SingleSim
3g=yes
Yes
wifi=yes
(2.1 mbps upto)

How to remove unwanted words.

Luke · Accepted Answer · 2012-11-20 05:53:12Z

4

You can't use simple find and replace because there are parts of the original string you don't want.

Untested, but this will probably work:

NSArray *parts = [specialstring componentsSeparatedByString:@"@@"];
NSMutableArray *result = [[NSMutableArray alloc] init];
for(NSString *piece in parts) {
    NSArray *pairs = [piece componentsSeparatedByString:@"="];
    if([pairs count] > 1) {
        NSString *key = [pairs objectAtIndex:0];
        NSString *values = [pairs objectAtIndex:1];
        NSArray *avalues = [values componentsSeparatedByString:@"%%"];
        [result addObject:[NSString stringWithFormat:@"%@=%@", key, [avalues lastObject]]];
    }
}

NSLog(@"%@", [result componentsJoinedByString:@"\n"]);
// [result release]; // Uncomment if ARC is turned off

First splits by @@ and iterates over array. Then splits by = to get key on left side (index 0). Takes right side (index 1) and splits by %% and uses last value.

edited Nov 20, 2012 at 5:53

answered Nov 20, 2012 at 5:28

Luke

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4 Comments

Praveenkumar Over a year ago

Exception raising -

Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 1 beyond bounds [0 .. 0]

Luke Over a year ago

Hmmm... works perfectly with the sample you gave. Added a condition to fix the exception. What string caused the exception?

Prasad G Over a year ago

[result addObject:[[NSString alloc]initWithFormat:@"%@=%@", key, [avalues lastObject]]]; Try it...

Luke Over a year ago

Prasad G: That's virtually the same thing, besides the fact using an init in that fashion would be very bad with ARC turned off.

Narayana Rao Routhu · Accepted Answer · 2012-11-20 05:50:39Z

1

Trim like below it will work

NSString *strRes = @"brand=company%%samsung@@modelnumber=webmodel%%GT1910@@Sim=Single%%SingleSim@@3g=yes%%Yes@@wifi=yes%%yes(2.1 mbps upto)";
strRes = [strRes stringByReplacingOccurrencesOfString:@"=" withString:@"--"];
strRes = [strRes stringByReplacingOccurrencesOfString:@"@@" withString:@"\n"];
NSRange rangeForTrim;
while ((rangeForTrim = [strRes rangeOfString:@"--[^%%]+%%" options:NSRegularExpressionSearch]).location != NSNotFound)
    strRes = [strRes stringByReplacingCharactersInRange:rangeForTrim withString:@"="];

NSLog(@"%@",strRes);

edited Nov 20, 2012 at 5:50

answered Nov 20, 2012 at 5:45

Narayana Rao Routhu

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Comments

Ravi · Accepted Answer · 2012-11-20 05:21:26Z

0

Well, I can't write the code right away but here's what you gotta do:

Replace all %% with (space)
Replace all @@ with \n
Remove all words between = and (space)

answered Nov 20, 2012 at 5:21

Ravi

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