Question

I am getting UIImage using UIImagePickerController. How can i calculate number of bytes hold by that Image in kb/mb ?

Using that values I have to make logic that user cant add Images more than size of 1MB

Answer 1

Sure you can. Convert the UIImage to a NSData object, which has the length property, which will give you its size in bytes. Then you can easily calculate the size in whatever unit you need.

So for example:

    UIImage *img = [UIImage imageNamed:@"some.png"];
    NSData *dataObj = UIImageJPEGRepresentation(img, 1.0);
    int bytes = [dataObj length];
    //convert into whatever unit you need