After designing your pixel-perfect application in Photoshop, naming and exporting everything correctly - what is the best method / tools that we can use to explain to developers where we specifically want those PNG's placed on the screen?
The biggest issue I have had is that after preparing everything to pixel-perfection, the developer makes a mess of all of my PNG's. I ask and ask to use my mock-ups for reference, but they are never able to accurately position the elements to match my PSD.
Just to be clear - I am aware of Apple's guidelines and I always design everything to spec. - What I am referring to is the placement of the PNG's within the application itself. For example, lets say that I have a logo that should sit in a specific place within a navigation bar and a menu icon on the left and a search icon on the right. The placement of those icons and the logo is never exactly like the PSD. There are always issues with vertical/horizontal centering and it causes days of back and forth troubleshooting to get right.
Can you recommend how I can be more helpful to them, what I can prepare for them or use to indicate the specific positioning of the PNG elements within xCode?