I am new to iOS development. I developing a small application using X code 7. I installed the app in iPhone 5 but I unable to open the app after clicking (taping) on the screen. I am testing the app in iPhone 5 device connected to mac. Please give me some suggestions. Thank you in advance.
You might have to trust your app:
Goto: Settings > General > Device Management > Select App from Developer Apps > Trust App
Current Xcode is version 7.2.1 - try building and running with it, after deleting the old app off your device.
Still no luck, show any errors and try to describe what happens, exactly.