iOS - Xcode Installation
Step1 Download the latest version of Xcode from(https://developer.apple.com/downloads/)
Step 2 Click the Xcode dmg file.
Step 3 You will find a device mounted and opened.
Step 4 There will be two items in the window that's displayed namely, Xcode application and the Application folder's shortcut.
Step 5 Drag the Xcode to application and it will be copied to your applications.
Step 6 Now Xcode will be available as a part of other applications from which you can select and run.
You also have another option of downloading Xcode from the Mac App store and then install following the step-by-step procedure given on the screen.
Interface Builder
The interface builder is the tool that enables easy creation of UI interface. You just have to drag and drop into your UI view.
You have objects library at the right bottom that consists the entire necessary UI element
iOS Simulator
An iOS simulator actually consists of two types of devices, namely iPhone and iPad with their different versions. This is an iPhone simulator
With this simulator you can simulate location with latitude and longitude , memory warning and others but this similator cannot test accelerometer features.So we will need an iOs device to test your application with all features