I already had many UIImageViews.. I want to make an array of UIImageViews and assign every element of the array with one of the UIImageViews above.. How can I do that with objective c?? I did it in java like the following:
JLabel l1=new JLabel();
JLabel l2=new JLabel();
JLabel [] arrayOfLabels = new JLabel[2];
arrayOfLabel[0] = l1;
arrayOfLabel[1] = l2;
I need to do the same thing in objective c..
Let me answer you according to your Java Statements for better clarity:
//Java:
JLabel l1=new JLabel();
//Objective C:
UIImageView * l1= [[UIImageView alloc] init];
//Java:
JLabel l2=new JLabel();
//Objective C:
UIImageView * l2 = [[UIImageView alloc] init];
//Java
JLabel [] arrayOfLabels = new JLabel[2];
//Objective C
NSMutableArray * imagesArray = [[NSMutableArray alloc] init];
//Java
arrayOfLabel[0] = l1;
//Objective C
[imagesArray addObject:l1];
//Java
arrayOfLabel[1] = l2;
//Objective C
[imagesArray addObject:l2];
Since you are not using ARC (i guessed it from your comment), so therefore you must release the things manually as part of memory management as:
[l1 release]; //After adding it to imagesArray
[l2 release]; //After adding it to imagesArray
And release the imagesArray when you don't need it. Normally it is done in dealloc(), but you can release it at any point where you don't need it further by simply calling:
[imagesArray release];
imagesArray = nil;
Hope so this will help you.
imagesArray[0] = l1 is legal too, more java-esque.[imagesArray release] when you no longer need it. and [l1 release] and [l2 release] after you add them to the array.UILabel * l1 = [[UILabel alloc] init];
UILabel * l2 = [[UILabel alloc] init];
NSMutableArray * arrayOfLabels = [NSMutableArray arrayWithCapacity:2];
arrayOfLabels[0] = l1;
arrayOfLabels[1] = l2;
UIImageView *view1;
UIImageView *view2;
// assuming they are already instantiated
NSMutableArray *arrayOfImageViews = [[NSMutableArray alloc] init];
[arrayOfImageViews addObject:view1];
[arrayOfImageViews addObject:view2];
[arrayOfImageViews replaceObjectAtIndex:1 with Object:view1];. Note that the array contains pointers to real objects (e.g. view1, view2). You can't modify a pointer, only replace. However you can modify the element the pointer points to. You can access it with [arrayOfImageViews objectAtIndex:1]Using the more modern syntax you can say
NSArray *myViewArray=@[ view1, view2, view3 ];
