Objective-C Simplest way to create comma separated string from an array of objects

objective-c arrays swift nsmutablearray
Jhorra picture Jhorra · Apr 26, 2012 · Viewed 37.7k times · Source

So I have a nsmutablearray with a bunch of objects in it. I want to create a comma separated string of the id value of each object.

Answer

rdelmar picture rdelmar · Apr 26, 2012

Use the NSArray instance method componentsJoinedByString:.

In Objective-C:

- (NSString *)componentsJoinedByString:(NSString *)separator

In Swift:

func componentsJoinedByString(separator: String) -> String

Example:

In Objective-C:

NSString *joinedComponents = [array componentsJoinedByString:@","];

In Swift:

let joinedComponents = array.joined(seperator: ",")

Related questions

Convert NSArray to NSString in Objective-C

I am wondering how to convert an NSArray [@"Apple", @"Pear ", 323, @"Orange"] to a string in Objective-C.

Read More
Initialize Array of Objects using NSArray

I'm pretty new to Objective-C and iOS so I've been playing around with the Picker View. I've defined a Person Class so that when you create a new Person it automatically gives that person a name and age. #import "Person.…

Read More
Variably modified array at file scope

I want to create a constant static array to be used throughout my Objective-C implementation file similar to something like this at the top level of my ".m" file: static const int NUM_TYPES = 4; static int types[NUM_TYPES] = { 1, 2, 3, 4 }; I …

Read More