Terminating app due to uncaught exception 'NSRangeException' gives Range or index out of bounds'

Question

I am working on barcode app and getting the location from CLController so its giving location,speed and many other thing so i substring that WithRange and getting exception so please kindly give me the reason and what should i do for this?

Thanks in advance.

- (void)locationUpdate:(CLLocation *)location {

locstr = [location description ];
//NSLog(@"current location is %@ ",locstr);

NSString* regexString =@"<(.*?)>";
NSRegularExpressionOptions options = NSRegularExpressionCaseInsensitive;
NSError* error = NULL;

NSRegularExpression* regex = [NSRegularExpression regularExpressionWithPattern:regexString options:options error:&error];
if (error) {
    //NSLog(@"error is %@", [error description]);
}

NSArray* results = [regex matchesInString:locstr options:0 range:NSMakeRange(1, [locstr length])];
for (NSTextCheckingResult* result in results) {


    resultString = [locstr substringWithRange:result.range];
    //NSLog(@"%@",resultString);
    //life = [[resultString substringWithRange:NSMakeRange(1)] retain];
    resultString =[resultString substringWithRange:NSMakeRange(1,27)];

    resultString = [resultString stringByReplacingOccurrencesOfString:@" "
                                                           withString:@""];
    life = [resultString stringByReplacingOccurrencesOfString:@"+"
                                                   withString:@""];
    life = [[life substringWithRange:NSMakeRange(0,[life length]-1)] retain];
    //NSLog(@"in update %@",life);


}

}

getting this exception

2011-11-23 14:24:58.161 BarCodeApp[2632:707] * Terminating app due to uncaught exception 'NSRangeException', reason: ' -[NSRegularExpression enumerateMatchesInString:options:range:usingBlock:]: Range or index out of bounds' First throw call stack: (0x326398bf 0x364a31e5 0x326397b9 0x326397db 0x3783846b 0x37838a11 0x37af 0xbe73 0x3548f5df 0x3548ef81 0x3548962f 0x3260db31 0x3260d15f 0x3260c381 0x3258f4dd 0x3258f3a5 0x37cd0fed 0x30eda743 0x2337 0x22b8) terminate called throwing an exceptionProgram received signal: “SIGABRT”. Data Formatters temporarily unavailable, will re-try after a 'continue'. (Can't find dlopen function, so it is not possible to load shared libraries.)

Answer 1

dito Aadhira

The app could also crash at

NSMakeRange(1, [locstr length])

You define a range from 1 to [locstr length] there while [locstr length] must be [locstr length]-1.

The string "NSMakeRange" has a length of 11 characters. So, its array index range is is 0-10. Covering your code, the range would be 1-11 as you start at 1 and stop at 1+10=11.