nsstring

This is my function. First println print correct hash to console but in the next row program crashes. Can you help me? func sha256(string: NSString) -> NSString { var data : NSData! = string.dataUsingEncoding(NSUTF8StringEncoding) var hash = [UInt8](count: Int(CC_SHA256_DIGEST_LENGTH), repeatedValue: 0) CC_SHA256(data.bytes, CC_LONG(data.length), &hash) let res = NSData(bytes: hash, length: Int(CC_SHA256_DIGEST_LENGTH)) println(res) let resstr = NSString(data: res, encoding: NSUTF8StringEncoding) println(resstr) return resstr } let resstr = NSString(data: res, encoding: NSUTF8StringEncoding)

Given a string, I need to obtain a count of each word that appears in that string. To do so, I extracted the string into an array, by word, and searched that way, but I have the feeling that searching the string directly is more optimal. Below is the code that I originally wrote to solve the problem. I'm up for suggestions on better solutions though. NSMutableDictionary *sets = [[NSMutableDictionary alloc] init]; NSString *paragraph = [[NSString alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"text" ofType:@"txt"] encoding:NSUTF8StringEncoding error:NULL]; NSMutableArray

Is there a way to get the correct size of an NSString using: - (CGSize)sizeWithFont:(UIFont *)font forWidth:(CGFloat)width lineBreakMode:(UILineBreakMode)lineBreakMode that doesnt get thrown off by 2 or 3 hundred character strings. At the moment if I try to use this method on these long strings it incorrectly calculates them and I end up with lots of whitespace at the bottom of the UITextView. I've tried using UILineBreakModeWordWrap and UILineBreakModeCharacterWrap. the resizing is being done in - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

I have a NSPredicate like this: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"entity.name CONTAINS %@", myString]; But that will return anything which contains that string. For example: If my entity.name's where: text texttwo textthree randomtext and the myString was text then all of those strings would match. I would like it so that if myString is text it would only return the first object with the name text and if myString was randomtext it would return the fourth object with the name randomtext . I am also looking for it to be case insensitive and that it ignores whitespace

I have an NSMutable dictionary that contains file IDs and their filename+extension in the simple form of fileone.doc or filetwo.pdf. I need to determine what type of file it is to correctly display a related icon in my UITableView. Here is what I have done so far. NSString *docInfo = [NSString stringWithFormat:@"%d", indexPath.row]; //Determine what cell we are formatting NSString *fileType = [contentFiles objectForKey:docInfo]; //Store the file name in a string I wrote two regex to determine what type of file I'm looking at, but they never return a positive result. I haven't used regex in iOS

I recently had a problem when comparing two NSURLs and compare one NSURL with an NSString(which is a URL address), the situation is I got an NSURLRequest from somewhere, I may or may not know the URL address it points to, and I have an URL NSString, say "http://m.google.com", now I need to check if the URL in that NSURLRequest is the same as the URL string I had: [[request.URL.absoluteString lowercaseString] isEqualToString: [self.myAddress lowercaseString]]; this returns NO as the absoluteString gives me "http://m.google.com/" whereas my string is "http://m.google.com" without a slash in the