How to sort an array with respect to another

You can sort an array with respect to another easily by adding them to an NSDictionary and do as follows:

            

    // Put the two arrays into a dictionary as keys and values

    NSDictionary *dictionary = [NSDictionary 

                               dictionaryWithObjects:secondArray forKeys:firstArray];

    // Sort the first array

    NSArray *sortedFirstArray = [[dictionary allKeys]  

                               sortedArrayUsingSelector:@selector(compare:)];

    // Sort the second array based on the sorted first array

    NSArray *sortedSecondArray = [dictionary objectsForKeys:sortedFirstArray 

                                             notFoundMarker:[NSNull null]];

How to set an image at the left corner of an UIButton

Let button Frame is:

  myButton.frame = CGRectMake(0, 0, 80, 30);

            

To set an image at the left corner of an UIButton, do as follows:

  [myButton setImageEdgeInsets:UIEdgeInsetsMake(0, 30, 0, 80)];