iphone screen color fading

Excerpt from: http://blog.ibireme.com/2014/09/16/adapted_to_iphone6/Apple's website is designed to show that the ultra-high pixel density of the retina display has surpassed the range of human eyes to distinguish.What effect does retina have on image design (icons, splash screens and all other pixels)? If our app is to support retina, we need to provide high resolution (wide x2, high x2) images. Also, in order to support devices without retina, you still have to prepare a low-resolution version.

For different Apple devices, see IOS: Model parameters, SDK, Xcode versions for each of the parameters.model ChangesCoordinates: Indicates the physical size of the screen, the coordinates become larger, indicating that the machine screen size has become larger;Pixels: Indicates the size of the screen picture, with a correspondence between coordinates, such as 1:1

What is the screen bad point The LCD screen's bad point is also called a point absence, which refers to the LCD display Black-and-white and red, yellow, blue, the three primary colors displayed in the sub pixel point, each point is a sub-pixel. The LCD screen is most afraid of the bad points. In the event of a bad spot, a point on the display will always display the same

With the increase in Apple products and the increasing number of screen sizes, how do we make our app adapt to different types of apple screen sizes when writing programs?When Apple gave a solution, a point concept was proposed. A point in 3gs corresponds to one pixel, and a point in 4 (s) corresponds to two pixels. In iOS development, it is more convenient to point as a unit, as @1x in the following table

template is the borderbrush attribute bound to the control, in this way, when the color of the control boerderbursh changes, the result is that the background attribute in the template is changed, and the color indicated by the Red Arrow is visually changed. Next, let's take a look at the attributes of contentprestener. We found that it has a content attribute. If you click it, we also find that it is also