Question

Trying to work with array, but it gives me “Statement requires expression of integer type(‘id’ invalid)” right at switch statement. What’s wrong?

NSArray count = [NSArray arrayWithObjects: @"1", @"2", @"3", @"4", @"5", @"6", @"7", nil];    

switch ([count objectAtIndex: myIndex]) {
    case 1:
        NSLog(@"One");
        break;
    case 2:
        NSLog(@"Two");
        break;
    case 3:
        NSLog(@"Three");
        break;
    default:
        break;
}

Answer 1

A switch statement only works on integral types. Your array contains NSString objects. Convert the NSString that you get from the array to an integer like this:

NSArray count = [NSArray arrayWithObjects: @"1", @"2", @"3", @"4", @"5", @"6", @"7", nil];

NSString *obj = [count objectAtIndex: myIndex];
switch ([obj intValue]) {
    case 1:
        NSLog(@"One");
        break;
    case 2:
        NSLog(@"Two");
        break;
    case 3:
        NSLog(@"Three");
        break;
    default:
        break;
}