how to change order of NSMutable array in same way another mutable arrays get changed

Question

I have three arrays. They are name, birthdates and remaining days like below:

    name                         birth         


        

Answer 1

such as your MutableArray is a Dictionarys array , you can use sortUsingComparator to sort the array

[array sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {

    int a = [(NSNumber *)[(NSDictionary *)obj1 objectiveForKey: @"remanning"] intValue];
    int b = [(NSNumber *)[(NSDictionary *)obj2 objectiveForKey: @"remanning"] intValue];

    if (a < b) {
        return NSOrderedAscending;
    }
    else if(a == b)
    {
        return NSOrderedSame;
    }
    return NSOrderedDescending;
}];

For example , I have a test :

NSMutableArray *array = [[NSMutableArray alloc] initWithObjects:@(30),@(20),@(5),@(100), nil];

[array sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {

    int a = [(NSNumber *)obj1 intValue];
    int b = [(NSNumber *)obj2 intValue];

    if (a < b) {
        return NSOrderedAscending;
    }
    else if(a == b)
    {
        return NSOrderedSame;
    }
    return NSOrderedDescending;
}];

[array enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    NSLog(@"%@ , %d",obj,idx);
}];

then the output is :