read a line in Objective-C

Question

Hello, i've to read a .txt file , The file lokes like,

WIPRO=Class_Name1
TCS=Class_Name2

Now i want to Class_Name1 and Class_Name2.How to get this string in Objective-C? I'm not finding any function in NSString to get the index of a character.Like how we have getIndex() in C#.tel me how to proceed.

Answer 1

The NSString Reference has an entire subheading named "Finding Characters and Substrings."

Finding Characters and Substrings

– rangeOfCharacterFromSet:
– rangeOfCharacterFromSet:options:
– rangeOfCharacterFromSet:options:range:
– rangeOfString:
– rangeOfString:options:
– rangeOfString:options:range:
– rangeOfString:options:range:locale:
– enumerateLinesUsingBlock:
– enumerateSubstringsInRange:options:usingBlock:

Answer 2

Regular expressions might makes this a whole lot easier. Checkout this answer: http://stackoverflow.com/questions/422138/regular-expressions-in-an-objective-c-cocoa-application

Answer 3

Ok, will try again. This format is pretty simple.

componentsSeparatedByString: is the magic method you want. Use it to break the text string into an array for each line, and then break each line to access the lines key and value on each side of the =.

- (NSDictionary*)dictFromConfigString:(NSString*)myTxtFileAsString {
    NSMutableDictionary *result = [NSMutableDictionary dictionary];
    NSArray *lines = [myTxtFileAsString componentsSeparatedByString:@"\n"];
    for (NSString *line in lines) {
        NSArray *pair = [line componentsSeparatedByString:@" = "];
        NSString *key = [pair objectAtIndex:0];
        NSString *value = [pair objectAtIndex:1];
        [result setObject:value forKey:key];
    }
    return result;
}