You can try something like this: @implementation NSString (JRAdditions) + (BOOL)isStringEmpty:(NSString *)string { if([string length] == 0) { //string is empty or nil return YES; } if(![[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length]) { //string is all whitespace return YES; } return NO; } @end Check out the NSString reference on ADC.
You can’t use a cast to convert an object from one type to another. Use the provided method: label1.text = [string1 string]; Better yet, use the attributed string: label1.attributedText = string1
This code here is working for me NSString *s = @”avant”; s = [s stringByAppendingString:@” – après”]; NSLog(@”%@”, s); 2012-01-13 11:48:59.442 tabbar[604:207] avant – après So my guess is that your you is a bad pointer that is not nil and not the NSString you think it have. Have you try an NSLog on that … Read more
You can do this in one line. For example, this counts the number of spaces: NSUInteger numberOfOccurrences = [[yourString componentsSeparatedByString:@” “] count] – 1;
You can use NSDictionary and apply attributes like this: NSFont *font = [NSFont fontWithName:@”Palatino-Roman” size:14.0]; NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObjectsAndKeys: font, NSFontAttributeName, [NSNumber numberWithFloat:1.0], NSBaselineOffsetAttributeName, nil]; Use attrsDictionary as argument. Refer: Attributed String Programming Guide Refer: Standard Attributes SWIFT: IN String drawInRect is not available but we can use NSString instead: let font = UIFont(name: … Read more
Here’s an NSScanner based solution: // Input NSString *originalString = @”This is my string. #1234″; // Intermediate NSString *numberString; NSScanner *scanner = [NSScanner scannerWithString:originalString]; NSCharacterSet *numbers = [NSCharacterSet characterSetWithCharactersInString:@”0123456789″]; // Throw away characters before the first number. [scanner scanUpToCharactersFromSet:numbers intoString:NULL]; // Collect numbers. [scanner scanCharactersFromSet:numbers intoString:&numberString]; // Result. int number = [numberString integerValue]; (Some of … Read more
You need to use NSRegularExpression class. Example inspired in the documentation: NSString *yourString = @””; NSError *error = NULL; NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@”(NS|UI)+(\\w+)” options:NSRegularExpressionCaseInsensitive error:&error]; [regex enumerateMatchesInString:yourString options:0 range:NSMakeRange(0, [yourString length]) usingBlock:^(NSTextCheckingResult *match, NSMatchingFlags flags, BOOL *stop){ // your code to handle matches here }];
Use the NSString initWithData:encoding: method. NSString *someString = [[NSString alloc] initWithData:hashedData encoding:NSASCIIStringEncoding]; (edit to respond to your comment:) In that case, Joshua’s answer does help: NSCharacterSet *charsToRemove = [NSCharacterSet characterSetWithCharactersInString:@”< >”]; NSString *someString = [[hashedData description] stringByTrimmingCharactersInSet:charsToRemove];
This will remove all invalid characters anywhere in the filename based on Ismail’s invalid character set (I have not verified how complete his set is). – (NSString *)_sanitizeFileNameString:(NSString *)fileName { NSCharacterSet* illegalFileNameCharacters = [NSCharacterSet characterSetWithCharactersInString:@”/\\?%*|\”<>”]; return [[fileName componentsSeparatedByCharactersInSet:illegalFileNameCharacters] componentsJoinedByString:@””]; } Credit goes to Peter N Lewis for the idea to use componentsSeparatedByCharactersInSet: NSString – Convert … Read more
This works for me: let imageAttachment = NSTextAttachment() imageAttachment.image = UIImage(systemName: “checkmark.circle”) // If you want to enable Color in the SF Symbols. imageAttachment.image = UIImage(systemName: “checkmark.circle”)?.withTintColor(.blue) let fullString = NSMutableAttributedString(string: “Press the “) fullString.append(NSAttributedString(attachment: imageAttachment)) fullString.append(NSAttributedString(string: ” button”)) label.attributedText = fullString Result: