Question

I have in tableView NSMutableArray “days” which contain 6 NSMutableArray (monday, tuesday…saturday)

Before I doing sort,this method is work

tuesday = [NSMutableArray arrayWithArray:[tuesday sortedArrayUsingComparator:^(id cont1, id cont2) { return [[(Lesson *) cont1 time1] compare:[(Lesson *) cont2 time1]]; }]];

but now I must doing [days objectAtIndex:0]=…. but how I do this if this expression is unacceptable

Answer 1

You can not assign an object to a NSMutableArray with the equal sign, use the following:

[days addObject:theObjectYouWantToAdd];

EDIT:

In case you would like to add the new object to a particular position on the original mutable array (say position 0), you have to remove the old one by:

[days removeObjectAtIndex:0];

Ant then insert the new one by:

[days insertObject:theObjectYouWantToInsert atIndex:0];