Its a small library, but i think it can find its place in many objectivec. A macro and a set of functions introducing reflection for enumerations in objectivec. Create datamodel with swiftyjsonaccelerator tool download swiftyjsonaccelerator download generate datamodel tool swiftyjsonaccelerator. Nsstring in objective c nsstring in objective c in this series of iphone. Aug 07, 20 a convenient shortcut of nsstring stringwithformat. Im working on an iphone app nothing fancy, just playing around with the sdk but i cant seem to find a way to do such a simple thing as to convert between ints and strings.
Writelineunable to convert the string 0 to a biginteger value. The answer is given but think that for some situation this will be also interesting way to get string from nsinteger. This is my sample code to convert a integer into string. Nsuinteger objectivec runtime apple developer documentation. A 64bit application treats nsuinteger as a 64bit unsigned integer. A string and an integer are fundamentally different data types, and casting in objective c wont do a conversion for you in this case, itll just lie to the compiler about whats happening so it compiles but at runtime it blows up. Firstclass swift api for objectivec frameworks inside pspdfkit.
A helpful function converting a nsstring object into a bool aka boolean. Learn how to useing the nsstring class objective c with iphone application. Should i not be using a primitive int type to store the number. Nsinteger objectivec runtime apple developer documentation. You need to explain what your problem is and what you have done to try and fix it, then perhaps someone can advise.
To nsinteger string intvalue to nsnumber nsnumber numberwithint. Translates the string representation of a biginteger in the specified radix into a biginteger. Returns a string created by copying the data from a given c array of utf8encoded bytes. When building 32bit applications, nsinteger is a 32bit integer. You can assign a decimal or floatingpoint value to a biginteger object if you cast the value or convert it first. How to use objective c in xcode to create an ios app that will convert an nsstring into an int or nsinteger value that can then have. Objectivec convert nsstring to int and vice versa eureka. Is it very costly to do the multiple loops of nsmutablestring stringwithformat i. Browse other questions tagged interviewquestions objectivec formatting integer or ask your. The atoi function converts a character string to an integer value. When building 32bit applications, nsuinteger is a 32bit unsigned integer.
A 64bit application treats nsinteger as a 64bit integer. All lengths, character indexes, and ranges are expressed in terms of 16bit platformendian values, with index values starting at 0 an nsstring object can be initialized from or written to a c buffer, an nsdata object, or the contents of an nsurl. One of the primary distinctions is that you can use nsnumber in collections, such as nsarray, where an object is required. Feb 07, 2011 given the foundation of objectivec is built upon the c programming language, its good to know how to convert c based strings to nsstring objects, and viceversa for clarification. Declaring variables in objectivec problem you want to use variables with clear names in your ios apps. Declaring variables in objectivec ios 6 programming. The version of clang supplied with xcode has over time added a number of additional warnings for potentially unsafe code. An objectivec string object can contain letters, numbers or characters. To practice source code presented in this lesson, you should download and unzip this file.
With that said, you can get the bytes for a particular encoding using. Sign up essential categories for uiimage, nssdate, nsstring and more for ios. This is probably a very simple problem that i just dont understand due to my inexperience with objectivec, but im basically trying to format a saved nsinteger into the text of a tableviews cell. An nsinteger has the method stringvalue that can be used even. Dec 29, 2008 nsnumber is an objective c class, a subclass of nsvalue to be specific. Nsinteger isnt an object its simply typecast to int on 32bit or long on 64bit.
Find the example of iphone nsstring class in object c. Nsstring to bool a helpful function converting a nsstring object into a bool aka boolean. An nsstring isnt made of chars, so each character is not a byte, it is a unichar, which is typedefd to short int. The version of clang supplied with xcode has over time added a. A convenient shortcut of nsstring stringwithformat. Objectivec and swift interoperability with pspdfkitswift. Is it very costly to do the multiple loops of nsmutablestring stringwithformat. One the common things you need to do in any programming language is convert a string e. Contribute to fastred reflectableenum development by creating an account on github. Nsdata can be represented as hexadecimal string, similar to what it outputs in its description method swift. Format string issue values of type nsinteger should not be used as format arguments. Objectivec solution boilerplate for hackerrank github. This method is meant to be called from within a variadic function, where the argument list will be available. Note that on 64bit processors, such as the new a7 chip, if your app is compiled for 64bit, an nsinteger is actually a long, not an int.
Apr 10, 2008 ive been strugling for 3 hours now trying to find a way to convert an int to a string in xcode. A category on nsstring to spell ordinal numbers as words. Solution apple conventions dictate certain rules for variable names. Determine the type selection from ios 6 programming cookbook book.
I think you need to substring your string, and store each number in a new nsstringintegervalue or in integer variable. Apr, 2014 how to use objective c in xcode to create an ios app that will convert an nsstring into an int or nsinteger value that can then have mathematical functions applied. Returns a string containing the bytes in a given c array, interpreted according to a given encoding. Sep 18, 2009 an nsstring isnt made of chars, so each character is not a byte, it is a unichar, which is typedefd to short int. This is generally a good thing but i was a little alarmed recently when i opened a project and found the unit test classes had dozens of warnings. By continuing to use pastebin, you agree to our use of cookies as described in the cookies policy. How to create uitableviewcells with complex content in order to keep scrolling fluent. Download duckduckgo on all your devices with just one download youll get.
A useful and helpful collection library of common objectivec functions, methods, classes and categories. The input string is a sequence of characters that can be interpreted as a numeric. Constructs a newly allocated integer object that represents the int value indicated by the string parameter. What is the difference between nsinteger, nsnumber, int and all the. I have everything set up to save to the array, but since nsmutablearrays cant store ints, i have to convert my int to an nsnumber, this is where i am getting stuck. Nsstring provides builtin support for unicode, which means that we can include utf8 characters directly in string literals. I followed the execution through the debugger and the string myt gets the value of sum but the if statement does not work correctly if the sum is 10,11,12. Ive been strugling for 3 hours now trying to find a way to convert an int to a string in xcode. You can find more information on my tutorials and download the project files at. I create a nsdate object out of it and then get different components like day, month, date, year from it. Datatypes in objectivec are easy to change between.
I am trying to convert from an int to a string but i am having trouble. Converting between c and objectivec strings nsstring. We use cookies for various purposes including analytics. An objective c string object can contain letters, numbers or characters. Json parsing sample project ios development objective c. This property is 0 if the string doesnt begin with a valid decimal text representation of a number this property uses formatting information stored in the nonlocalized value. Given the foundation of objectivec is built upon the c programming language, its good to know how to convert c based strings to nsstring objects, and viceversa for clarification. Jan 28, 2017 a macro and a set of functions introducing reflection for enumerations in objective c. Objective c strings the string in objective c programming language is represented using nsstring and its subclass nsmutablestring provides several ways for creating string objects. Sep 02, 2008 this is probably a very simple problem that i just dont understand due to my inexperience with objective c, but im basically trying to format a saved nsinteger into the text of a tableviews cell. This property is 0 if the string doesnt begin with a valid decimal text representation of a number. What youre trying to do is going to inevitably bump into some serious performance issues in one case or another. You can create an nsnumber object from a signed or unsigned char, short int, int, long int, long long int, float, double or bool. It is an objectoriented language and hence, it would be easy for those who have some background in object.
Converting an int into an nsnumber, then saving to an. How to use objective c in xcode to create an ios app that will convert an nsstring into an int or nsinteger value that can then have mathematical functions applied. Contribute to bumaociyuannsstringblockhelper development by creating an account on github. A c string is simply a series of characters a onedimensional character array that is nullterminated, whereas an nsstring object is a complete object with class methods, instance methods, etc. Objectivec strings the string in objectivec programming language is represented. Also notice in swift, were using the string class as opposed to nsstring. Next post objectivec format specifier in nsstring thoughts on objectivec convert nsstring to int and vice versa james says.
The most basic way in which nsstring object is represented is shown below. Returns an nsstring object initialized by using a given format string as a template into which the remaining argument values are substituted according to given locale information. The nsstring class is a subclass of the nsobject superclass and it inherits all methods of the nsobject class. Doing the cast, intmonth would be destructive on 64bit platforms for the generic case. Nsnumber is an objectivec class, a subclass of nsvalue to be specific.
All lengths, character indexes, and ranges are expressed in terms of 16bit platformendian values, with index values starting at 0. Since nsdictionary can only store objects, you need to wrap the integer into an object before you can store it. Fwiw my rule of thumb on ios is to use nsinteger when im passing. Compares this biginteger with the specified object for equality. Aug 20, 2008 i have everything set up to save to the array, but since nsmutablearrays cant store ints, i have to convert my int to an nsnumber, this is where i am getting stuck. Following is the code of nsstring to nsinteger conversion. The nsinteger value of the string, assuming a decimal representation and skipping whitespace at the beginning of the string. A useful and helpful collection library of common objectivec functions, methods, classes and categories objectivec common functions. An nsstring object encodes a unicodecompliant text string, represented as a sequence of utf16 code units. Typedef void use in project ios development objective c. A c string is simply a series of characters a onedimensional character array that is nullterminated, whereas an nsstring object is a complete object with class methods, instance. Converting an int into an nsnumber, then saving to an array.
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