gah i just tested it ... doesn't really work on my iphone! seems like tapping elsewhere either doesn't blur the input field or it was never focused in the first place!
If an anchor has any events attached, the first tap on it in iOS causes the anchor to be put into the hover state, and focused. A tap away removes the hover state, but the link remains focused. This is by design. To properly control an application on iOS, you need to implement touch-based events and react to those instead of desktop ones.
gah i just tested it ... doesn't really work on my iphone! seems like tapping elsewhere either doesn't blur the input field or it was never focused in the first place!
from https://stackoverflow.com/questions/13492881/why-is-blur-event-not-fired-in-ios-safari-mobile-iphone-ipad