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cocoa-touchnsstringnsdata

isEqualToString not evaluating true

Method:

- (void)serverResponse:(NSData *)data
{
    NSString *response = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"%@", response);
    NSLog(@"%i", [response isEqualToString:@"1"]);
}

Log:

2015-03-15 06:26:53.716 appName[687:60b] 1                            
2015-03-15 06:26:53.718 appName[687:60b] 0

This doesn't seem to make any sense. I'm guessing the problem has something to do with the encoding, but I'm not sure what. Any help is appreciated.

Solution

  • When comparing strings, NSString does not take encoding into account.

    Your problem is simple: The response contains 28 spaces after the "1".

    Two possible solutions:

    BOOL integerValueEquality = [response integerValue] == 1;

    or 

    NSString *trimmedString = [response stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
BOOL stringEquality = [trimmedString isEqualToString:@"1"];