Question

Currently I do something that looks a bit fuzzy because I am dealing with points with my UI Object but what I want to do is get the width and height of the UI Object (in my case a UIImageView) in pixels.

Is this possible? I have looked around the documentation but I have not seen anything that looks relevant.

Can anyone assist with this?

Thanks!

Answer 1

Have you tried this?

[object frame].size.height

[object frame].size.width

I’m pretty sure that anything with a visual representation will have a frame attribute to indicate where it’s located. Of course, the origin of an object’s frame is relative to its container, but the size should always be useable.

Edit/Update:

I misread the initial question, which wants to also convert points –> pixels. Here’s how to make sure you get that correctly:

float scale;
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
    // This message was implemented in iOS 4.0
    scale = [[UIScreen mainScreen] scale];
} else {
    // Anything that is running < 4.0 doesn't have a Retina display
    scale = 1.0;
}

Then, multiply the height and width values by scale to get actual pixel count.