对包含自定义对象的NSArray进行排序

Question

I have an NSArray which contain objects. my Objects are like this :

@interface Personne : NSObject{

    int _id;
    NSString *name;
}

I have a Web services which returns to me persons by name. for example; when I click in the search bar and I put "a", the server returns to me all the persons where her name contains "a", I put the result in an NSArray . Now I would like to sort my array and put the persons whose name begins with "a" in the beginning of my array and the others at the end. How can I do this?

Edit: For example I have the response of the server like this :

marakech  
arabie  
malakit  
arsenal  
astonvilla

I would like to sort like this :

arabie 
arsenal 
astonvilla 
malakit

Answer 1

I think you'd need an NSMutableArray , not NSArray . Also to sort use sortUsingSelector:

ie first you can write a method for your Personne class - (NSComparisonResult)compare:(MyObj *)otherObj , then you could can sort the mutable array with sortUsingSelector:@selector(compare:)

check this - How to sort an NSMutableArray with custom objects in it?

Answer 2

You can use this method:

- (NSArray *)sortedArrayUsingComparator:(NSComparator)cmptr

which takes a comparator block, then you can put your sorting criteria in the block like this:

mySortedArray = [myArrat sortedArrayUsingComparator: ^(id a, id b) {
    //criteria;
    return [a compare:b];