what is ipad retina display mean

Being Retina display does not depend only on the PPI. It also depends on the viewing distance. Using the formula A = 2tan-1 (H/2d) at 15 inches (2.54 cm) away qualifies for a retina display. The eyes cannot discern the pixels at the distance, which is the essence of

and iOS Human Interface Guidelines. From the official documentation, I found out what we need to prepare for the retina display for the new iPad: IPad main app icon (144x144 pixels): 72X72 pixels were previously used on iPad 1

What does White Apple mean?Hardware and software faults on iOS devices are stuck on the startup screen (usually after jailbreak, plug-in conflicts or system bugs ).Why?There are many causes for the white Apple, which are common causes:1. A conflict between the software and the system causes the system to fail to load normally.2. There are too many boot items, and conflicts between the software and the softw

Thanks to Apple, it brings the Retina screen revolution, allowing us to enjoy print-grade resolution on the electronic display. Because of the improved resolution, text, Flash, and SVG content in the Web page is more granular than it was originally, but the images in the Web page become unusually blurry and have very serious resolution compatibility issues. Since

so on. 　　4K Display The ipad Pro uses the same approach when it comes to hardware updates for previous generations of ipads. Apple is expected to be equipped with an oversized display, according to TechRadar News that the IPad Pro not only uses a 12.9-inch screen, the res

A few days ago saw an article mentioned mean this word, what is mean? In fact, MENA is the abbreviation for the MongoDB (non relational database) + Express (template engine) + Angularjs (MVC JavaScript Library) + Nodejs (server script). Together, they construct a modern we

Uncover the real speed of ADSL Users who often use ADSL, do you know the real speed of ADSL? With this question, we will expand the problem step by step.Many users report that,The download speed of ADSL does not reach the nominal 512 K. After the computer accesses the network through ADSL, a download speed indicator is displayed during download. The download speed shown above is generally 50 Kbyte/s.Left an

What is the serial number of iPad air 2?IPad Air 2 [Settings]-[general]-[about the local machine], in the information about the local machine, we can view the serial number of iPad Air 2 (recommended to read: iPad Air 2, where

The general use of the ipad Air to run a large game may cause the fuselage heat, after all, the ipad Air has no built-in fan, metal back thermal conductivity is also more obvious. You can achieve better heat dissipation by removing the protective sleeve or turning on the air conditioner to lower the room temperature. Friendly Tips If you have a hot weather ther

What is MEAN? What does MEAN in JavaScript programming ?, Javascriptmean Some days ago I saw an article about MEAN. What is

This article mainly introduces what is MEAN? What does MEAN in JavaScript programming ?, Like lampp, MEAN refers to a combination of Full-stack development tools for modern web applications. If you need it, you can refer to the ar

What is called a reverse link. What is a dead link. What is an error link. What is called a reverse link. Often hear everyone in the answer

In the C language, for definitions and declarations, perhaps we are very familiar with, but not necessarily really understand!Definition means: The definition is to create a (compiler) an object, to allocate a memory space for this object and name, that is, the name of the variable or object that we normally call, once this is a memory space match, then in the de

really not a function pointer. The SEL variable is just an integer, which is the ID of the method, @selector () is the number of the class method. The previous function call is based on the function name, which is the string to find the function body. But now, we are lookin

automatically sync the appliance and make a backup.3. Wait for the backup to complete, then click on the "Restore iphone" button at the top right to return the device to the original settings.4. Finally press "Reply back up" (Restore Backup), select the time of the most recent backup, wait for the appliance to reply to the backup to complete. 　　 forgot Password: Method 2--using icloud1. On the notebook or desktop computer connected to the iphone or ipad