我的图像在iPhone应用程序的实用程序应用程序中不起作用

I working on a utility app. When I run the app in simulator clicking i image at the bottom flips the view in a flash. But when I run the app on iPhone device it behaves abnormally. At times it flips the view in just 1 tap. The other times it does not bother to react even after tapping the image 10 times. I tried with other utility app also - same issue. Thus its not an issue with the code I believe.I working on a utility app. When I run the app