Running and Testing on the Device
Automating our tests and testing the user interface will eliminate a lot of problems that can come up in our app. But we still have another big blind spot: what if the app behaves differently in the iOS Simulator app than it would on a real device?
This is not idle speculation. Macs are often (but not always!) more powerful than iOS devices, so apps can run faster in the Simulator than on real iOS hardware. A mouse or trackpad pointer is more precise than a finger touch, so running in the Simulator might also blind us to usability problems in the app. And there is some functionality that simply doesn’t exist in the Simulator: the Simulator won’t pretend that the Mac’s built-in webcam is either of the iPhone ...
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