Casting to NSString is required to resolve ambiguity between passing Kotlin string as C string and as NSString (casting to Any works too). Returns NULL if the receiver cannot be losslessly converted to encoding. Convert NSString to UTF-8 C string. Named arguments are required to resolve ambiguity between initWithFormat: and initWithFormat:locale:. In most cases, this is accomplished using an addition or concatenation operator. To make it work as an NSString, you should cast it to an NSString using the as operator before using it. For possible values, see NSString Encoding. String Length. 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 […] 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. NSString to char array objective-c. creates a Swift String, not an 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) NSString has a length property to get the number of characters. 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. The encoding for the returned C string. The length is … For example, this code fragment: ... Constructs and returns an NSString object that is the result of interposing a given separator between the elements of the array. Solution 2: To go from String to NSString use the following constructor: Therefore, you should copy the C string if it needs to be stored outside of the memory context in which you use this property. The simplest way to create a string object is to use the Objective-C @"" Two additional types of Objective-C string … In Swift, a char array is bridged as an UnsafePointer. Alternatively one … 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. Similarly, if the string begins or ends with the separator, the first or last substring, respectively, is empty. const char *cstr = [s UTF8String]; Append formatted string to NSString. 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. A C string representation of the receiver using the encoding specified by encoding. Return Value. The string in Objective-C programming language is represented using NSString and its subclass NSMutableString provides several ways for creating string objects. This is different than calling a method written in Objective-C and supplying a String instead of an NSString as a parameter. Note, when creating a string constant in this fashion, you should use UTF-8 characters. The string in Objective-C programming language is represented using NSString and its subclass NSMutableString provides several ways for creating string objects. 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. String concatenation is one of the most commonly-used techniques in modern programming. 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. 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