Order string array

Question

I need to order a set of strings in an array to some predefined order , like,If my array contains field [a,b,c,d] then i need to order the elements to a predefined order [c,a,b,d].If the source array miss any element then also i need to order it in predefined manner like if the source array contains [a,c,d] then i need the result as [c,a,d],Is this possible using NSPredicate in iPhone SDK.

Thanks in advance

score 1 · Answer 1 · answered Oct 13 '10 at 13:08

1

I'd just use NSString's built in compare: method :

NSArray *newArray = [oldArray sortedArrayUsingSelector:@selector(compare:)];

answered Oct 13 '10 at 13:08

deanWombourne

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score 0 · Answer 2 · edited May 23 '17 at 12:26

You can sort your array with an NSSortDescriptor like:

NSSortDescriptor *order = [[NSSortDescriptor alloc] initWithKey:@"key" ascending:YES];
NSArray *sorts = [[NSArray alloc] initWithObjects:order,nil];

NSArray *sortedArray = [myArray sortedArrayUsingDescriptors:sorts];
[sorts release];
[order release];

You create an array of sort descriptors which are applied in order.

You could also sort using a selector, see this answer for more options: How to sort an NSMutableArray with custom objects in it?

Order string array

2 Answers2