nsrange

问题 i know many solutions are available here for this problem but I am stuck on a single line which runs sometime successfully n crashes sometimes, i really dont know why this is happening..... here is my code of posting mail in which i m getting the error -[__NSCFDictionary rangeOfString:]: unrecognized selector sent to instance and here is my code of the method which is called on button pressed. NSString* ingredientLine = [arrayOfIngredientList objectAtIndex:i]; NSArray* split ; NSRange range =

问题 I would like to change the formatting of the first line of text in an NSTextView (give it a different font size and weight to make it look like a headline). Therefore, I need the range of the first line. One way to go is this: guard let firstLineString = textView.string.components(separatedBy: .newlines).first else { return } let range = NSRange(location: 0, length: firstLineString.count) However, I might be working with quite long texts so it appears to be inefficient to first split the

问题 I have an NSMutatableString: var string: String = "Due in %@ (%@) $%@.\nOverdue! Please pay now %@" attributedText = NSMutableAttributedString(string: string, attributes: attributes) How to calculate both the length and starting index from the word Overdue in swift? so far I have tried: let startIndex = attributedText.string.rangeOfString("Overdue") let range = startIndex..<attributedText.string.finishIndex // Access the substring. let substring = value[range] print(substring) But it doesn't

问题 let fullString = "Hello world, there are \(string(07)) continents and \(string(195)) countries." let range = [NSMakeRange(24,2), NSMakeRange(40,3)] Need to find the NSRange for numbers in the entire full string and there is a possibility that both numbers can be same. Currently hard coding like shown above, the message can be dynamic where hard coding values will be problematic. I have split the strings and try to fetch NSRange since there is a possibility of same value. like stringOne and

问题 I've just updated Xcode to 8.0 beta 2 and swift 3.0. After updating from swift 2.3 i'm getting a lot of errors. I have a String-extension that's converting a Range in the "self"-string to a NSRange: extension String { func NSRangeFromRange(_ range : Range<String.Index>) -> NSRange { let utf16view = self.utf16 let from = String.UTF16View.Index(range.lowerBound, within: utf16view) let to = String.UTF16View.Index(range.upperBound, within: utf16view) print("to: \(to) from: \(from)") print(self

问题 I want to validate email text for which I am using RegexKitLite.h . I am doing things as follows : NSString *strEmail = [txtEmail text]; NSRange range = [strEmail rangeOfRegex:@"^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$"]; NSLog(@"%@",range); For now I am just checking if this works. But I am getting error in second line. Log doesn't say anything. But there is a warning in second line which says : Unknown escape sequence '\.' What might be the

问题 I've just started learning Objective-C and made a little compass app that will display a direction when it falls into a range of headings. It works just fine, but I wonder if there is a more concise way of writing it using NSRange . After a lot of looking, it seems like NSRange is used more for string functions rather than numbers. I tried to make an instance of NSRange my starting point to make this more concise, I couldn't track down the function that would find if a number falls within an

问题 Getting this error when checking the range for string characters... @objc func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool { let shouldChange = false let text = textField.text var newString = text!.stringByReplacingCharactersInRange(range, withString: string) as? NSString if newString.length > 14{ newString = newString.substringToIndex(14) } textField.text = newString.uppercaseString return shouldChange } 回答1:

问题 I need NSRange objects for the position of each uppercase letter in a given NSString for input into a method for a custom attributed string class. There are of course quite a few ways to accomplish this such as rangeOfString:options: with NSRegularExpressionSearch or using RegexKitLite to get each match separately while walking the string. What would be the fastest performing approach to accomplish this task? 回答1: The simplest way is probably to use -rangeOfCharacterFromSet:options:range:

问题 This question already has answers here : How to get all NSRange of a particular character in a NSString? (4 answers) Closed 6 years ago . NSString *str = @" My name is Mike, I live in California and I work in Texas. Weather in California is nice but in Texas is too hot..."; How can I loop through this NSString and get NSRange for each occurrence of "California", I want the NSRange because I would like to change it's color in the NSAttributed string. NSRange range = NSMakeRange(0,