Question

I have a UIViewController with some images. I need to draw some horizontal and vertical lines in between images. Actually its like a hierarchy view. Is adding subviews with background color the best way to go?

Answer 1

You have 3 basic approaches:

1. Use QuartzCore and override drawRect: in a custom UIView subclass
2. Set the borderWidth and borderColor of the UIImageView layer property that contains each image
3. Create UIViews of height 1 for horizontal lines and width 1 for vertical lines, set the backgroundColor of the views and add them as subviews

3 is probably the easiest to implement, but not the most elegant, 1 is the most robust in terms of memory as you can also use drawInRect to draw your images into the same graphics context. This collapses the view hierarchy into a single view.