The string in Objective-C programming language is represented using NSString and its subclass NSMutableString provides several ways for creating string objects. In most cases, this is accomplished using an addition or concatenation operator. NSString *newStr = [s stringByAppendingFormat:@"%d %f", intVar, floatVar]; Append NSString string to NSString. Accessing characters works the same way in Swift for an NSString: let str: NSString = "hello" let charStr = str.UTF8String // UnsafePointer For a Swift String object things are a little different: let str = "hello" let charStr = str.cStringUsingEncoding(NSUTF8StringEncoding) This is different than calling a method written in Objective-C and supplying a String instead of an NSString as a parameter. This C string is a pointer to a structure inside the string object, which may have a lifetime shorter than the string object and will certainly not have a longer lifetime. The encoding for the returned C string. For possible values, see NSString Encoding. Convert NSString to UTF-8 C string. Objective-C string. When Swift originally launched, NSString (older iOS strings) and native Swift strings were completely interchangeable, as were NSArray and Swift arrays, plus NSDictionary and Swift dictionaries. const char *cstr = [s UTF8String]; Append formatted string to NSString. This got changed in Swift 1.2 so that you need to explicitly cast between these data types, and this remains the same in Swift today. A C string representation of the receiver using the encoding specified by encoding. NSString has a length property to get the number of characters. However, you do not do it this way in Objective-C. Strings in Objective-C are handled using the classes NSString and NSMutableString, and require a little more effort to work with on […] You can put the actual Unicode data in the string for localized text, as in NSString *hello = @"こんにちは";.You can also insert \u or \U in the string for non-graphic characters.. Objective-C string constant is created at compile time and exists throughout your program’s execution. The length is … Return Value. Note, when creating a string constant in this fashion, you should use UTF-8 characters. NSString to char array objective-c. Solution 2: To go from String to NSString use the following constructor: The simplest way to create a string object is to use the Objective-C @"" Two additional types of Objective-C string … The simplest way to create a string object is to use the Objective-C @"..." construct − NSString *greeting = @"Hello"; A simple example for creating and printing a string is shown below. The string in Objective-C programming language is represented using NSString and its subclass NSMutableString provides several ways for creating string objects. NSString *string = @"example"; NSUInteger length = string.length; // length equals 7 As in the Splitting Example, keep in mind that NSString uses UTF-16 to represent characters. Returns NULL if the receiver cannot be losslessly converted to encoding. Alternatively one … In Swift, a char array is bridged as an UnsafePointer. Discussion. Similarly, if the string begins or ends with the separator, the first or last substring, respectively, is empty. creates a Swift String, not an NSString. To make it work as an NSString, you should cast it to an NSString using the as operator before using it. Casting to NSString is required to resolve ambiguity between passing Kotlin string as C string and as NSString (casting to Any works too). String concatenation is one of the most commonly-used techniques in modern programming. 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