Sorting Random #s in IOS

hi i am new iphone programmer i want to know

I get reciever type int

how can i sort the the generated random numbers? lowest to highest

I want to sort the numbers then show it in randomText.text

#import "RandomViewController.h"


@interface RandomViewController ()

@end

@implementation RandomViewController
int sortArr[5];


-(IBAction)btnRandom{


    sortArr[0]= arc4random_uniform(5);
    sortArr[1]=arc4random_uniform(5);
    sortArr[2]=arc4random_uniform(5);
    sortArr[3]=arc4random_uniform(5);
    sortArr[4]=arc4random_uniform(5);
    randomText.text=[NSString stringWithFormat: @"%i,%i,%i,%i,%i",sortArr[0],sortArr[1],sortArr[2],sortArr[3],sortArr[4]];

    }


-(IBAction)btnClear{
    randomText.text=@"";
    sortedText.text=@"";

    NSSortDescriptor* sortOrder = [NSSortDescriptor sortDescriptorWithKey: @"self" ascending: YES];
    return [sortArr sortedArrayUsingDescriptors: [NSArray arrayWithObject: sortOrder]];


}

@end