Here’s a relatively simple approach. Just create an NSAttributedString with the appropriate font and ask for its size: – (CGFloat)widthOfString:(NSString *)string withFont:(NSFont *)font { NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:font, NSFontAttributeName, nil]; return [[[NSAttributedString alloc] initWithString:string attributes:attributes] size].width; }
NSString *str = @”Être ou ne pas être. C’était là-bas.”; NSData *data = [str dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; NSString *newStr = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; NSLog(@”%@”, newStr); … or try using NSUTF8StringEncoding instead. List of encoding types here: https://developer.apple.com/documentation/foundation/nsstringencoding Just FTR here’s a one line way to write this great answer: yourString = [[NSString alloc] initWithData: [yourString … Read more
I use these macros in my app. #define CASE(str) if ([__s__ isEqualToString:(str)]) #define SWITCH(s) for (NSString *__s__ = (s); ; ) #define DEFAULT SWITCH (string) { CASE (@”AAA”) { break; } CASE (@”BBB”) { break; } CASE (@”CCC”) { break; } DEFAULT { break; } }
If you want to add newline in Xcode5 / Xcode6 storyboard Attribute-Inspector (AI), you do it this way: Drag out a UITextView. Double-click it to edit text, place cursor where you want the paragraph break. Hit alt-Enter a couple of times to create a blank line & paragraph. Or, CTRL + Return make a new … Read more
Option 1: NSString *haystack = @”value:hello World:value”; NSString *haystackPrefix = @”value:”; NSString *haystackSuffix = @”:value”; NSRange needleRange = NSMakeRange(haystackPrefix.length, haystack.length – haystackPrefix.length – haystackSuffix.length); NSString *needle = [haystack substringWithRange:needleRange]; NSLog(@”needle: %@”, needle); // -> “hello World” Option 2: NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@”^value:(.+?):value$” options:0 error:nil]; NSTextCheckingResult *match = [regex firstMatchInString:haystack options:NSAnchoredSearch range:NSMakeRange(0, haystack.length)]; NSRange needleRange … Read more
The method matchesInString:options:range: returns an array of NSTextCheckingResult objects. You can use fast enumeration to iterate through the array, pull out the substring of each match from your original string, and add the substring to a new array. NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@”http?://([-\\w\\.]+)+(:\\d+)?(/([\\w/_\\.]*(\\?\\S+)?)?)?” options:NSRegularExpressionCaseInsensitive error:&error]; NSArray *arrayOfAllMatches = [regex matchesInString:httpLine options:0 range:NSMakeRange(0, [httpLine length])]; NSMutableArray … Read more
Xcode 9 • Swift 4 or later extension UIColor { convenience init?(hexaRGB: String, alpha: CGFloat = 1) { var chars = Array(hexaRGB.hasPrefix(“#”) ? hexaRGB.dropFirst() : hexaRGB[…]) switch chars.count { case 3: chars = chars.flatMap { [$0, $0] } case 6: break default: return nil } self.init(red: .init(strtoul(String(chars[0…1]), nil, 16)) / 255, green: .init(strtoul(String(chars[2…3]), nil, 16)) … Read more
After an hour of trial error I managed to make it work: CGSize maximumLabelSize = CGSizeMake(tableView.width, MAXFLOAT); NSStringDrawingOptions options = NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin; NSDictionary *attr = @{NSFontAttributeName: [UIFont systemFontOfSize:15]}; CGRect labelBounds = [string boundingRectWithSize:maximumLabelSize options:options attributes:attr context:nil]; Update: As Mr. T mentions in answer below : In iOS 7 and later, this method returns fractional … Read more
You can use rangeOfString:options:range: and set the third argument to be beyond the range of the first occurrence. For example, you can do something like this: NSRange searchRange = NSMakeRange(0,string.length); NSRange foundRange; while (searchRange.location < string.length) { searchRange.length = string.length-searchRange.location; foundRange = [string rangeOfString:substring options:0 range:searchRange]; if (foundRange.location != NSNotFound) { // found an occurrence … Read more
You can do this in one line. For example, this counts the number of spaces: NSUInteger numberOfOccurrences = [[yourString componentsSeparatedByString:@” “] count] – 1;