CODEWITHSUNDEEP
iphonerandomuiimageviewcgpoint
Andrew
Andrew

Reputation: 3892

Randomly place UIImageViews and then be able to find them

So I want to put some UIImageViews into my view. I want them to be put in random places and I need to be able to get the location of each of the random UIImageView later in code.

I would just have 5 UIImageViews and do each one separately, but I may need more or less then 5 at a later point, So a standard, uniform way would be the best approach.

This is the code I'm working with right now:

for (int i=0; i<5; ++i) {

    snack = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"03-loopback.png"]];
    //snack.frame = CGRectMake(104, 76, 32, 22);
    snack.frame = CGRectMake(arc4random()%448, arc4random()%298, 32, 22);
    [self.view addSubview:snack];
    snackLocation = CGPointMake(snack.center.x, snack.center.y);
}

Upvotes: 0

Views: 525

Answers (2)

Mat
Mat

Reputation: 7643

I think you can use tags:

add in the for loop:

snack.tag=i;//Set the tag for each imageview

then to access to a subview you can loop on each subview of your main view

for (UIView *yourSubView in [self.view subviews]) {

        if (yourSubView.tag == YOUR_TAG) {
            //Do what you want with the view
                    break;//jump out the loop
        }
    }

You can also use this to write less code and access directlty to the frame of your subview:

[self.view viewWithTag:YOUR_TAG].frame=YOUR_FRAME;

Take a look the inspector in IB, each UI element has a property tag that you can set to identify your elements.

Upvotes: 3

Rengers
Rengers

Reputation: 15238

Store each UIImageView instance in a NSArray so you can get a hold of them later. Then just use the frame property again to retrieve the position:

for (int i=0; i<5; ++i) {

    snack = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"03-loopback.png"]];
    snack.frame = CGRectMake(arc4random()%448, arc4random()%298, 32, 22);
    [self.snackViews addObject:snack]; //self.snackViews is an NSMutableArray
    [self.view addSubview:snack];
}

Later on, you can get all the views from the self.snackViews array.

Upvotes: 1

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