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背景图片大小iphone

[英]background image size iphone

原文 2011-09-15 13:08:02 6 2 iphone

Normal background image is 320x480 pixels. 普通背景图像为320x480像素。 and for retina is 640x960 pixels. 对于视网膜是640x960像素。

Now i have to put my background image and i have status bar(20) and navigation bar (44). 现在我必须放置我的背景图像，我有状态栏（20）和导航栏（44）。

So i have to reduce 64(20+44) from 480(normal) or from 960(retina)? 所以我必须从480（正常）或960（视网膜）减少64（20 + 44）？

if i reduce 64 from normal then normal image will be 320x416 pixels and retina will be 640x832 pixels. 如果我从正常减少64，那么正常图像将是320x416像素，视网膜将是640x832像素。
if i reduce 64 from retina then normal will be 320x448 and retina will be 640x896 . 如果我从视网膜减少64，那么正常将是320x448，视网膜将是640x896。

It is confusing me.. this 64(20+44) i reduce from which image type because other one will be exactly half or double of it. 这让我感到困惑..这64（20 + 44）我减少了哪种图像类型，因为其他图像将恰好是它的一半或两倍。

2 个解决方案

Reduce from the normal size. 减少正常尺寸。

64px = height to remove from normal display. 64px =从正常显示中移除的高度。

128px = height to remove from the retina. 128px =从视网膜上移除的高度。

Don't forget that in the retina display the status bar and nav bar will also be 2x the height :) 不要忘记，在视网膜显示屏中，状态栏和导航栏也将是高度的2倍:)

You do everything based upon the 320x480 size, then retina scales everything up. 你可以根据320x480尺寸做所有事情，然后视网膜可以扩展所有功能。 Using images suffixed @2x will allow you to replace the assets (mainly UIImage) for the retina version, this doesnt work for direct resource file references or video/audio files though so just be careful. 使用后缀为@ 2x的图像将允许您替换视网膜版本的资产（主要是UIImage），这不适用于直接资源文件引用或视频/音频文件，但请注意。

So measure for 320 for all your assets then your retina ones will simply be twice the size 因此，对于您的所有资产，测量320，那么您的视网膜只会是两倍大小