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http://mandarapte.com/apple/identify-user-iphone-ipad-ipod-touch-accessing-device-width-property-words-write-conditional-code-3-5-inch-iphone-4-inch-iphone-4-7-inch-iphone-5-5-inch-iphone-9-7-inch-ipad-12-9-inch-ipad/
How to identify user is on iPhone, iPad or iPod touch by accessing their device width property. In other words how to write conditional code for 3.5 inch iPhone, 4 Inch iPhone, 4.7 inch iPhone, 5.5 inch iPhone, 9.7 inch iPad, 12.9 inch iPad