Asset Catalog Help (七)---Customizing Image Sets for Size Classes

Customizing Image Sets for Size Classes

Add images to a set that are customized for display in different size classes supported by your app.

应用程序也支持把图片存入一个自定义集合，用来在不同的尺寸类中显示。

1. In the set list, select an image set.

   在集合列表(set list)中，选择一个图片集。

2. Open the utilities area for the workspace window by clicking the Show Utilities button ().

   点击()显示工作区窗口的工具区(utilities area).

3. In the inspector bar, click the Attributes Inspector button ().

   在inspector 栏，点击属性检查按钮 ()。

4. Choose Universal from the Device pop-up menu.

   在设备弹出菜单那选择Universal.

   

5. Choose a specific size class from the Width or Height size pop-up menu or from both.

   在width 或者Height弹出菜单中选择一个指定的尺寸类(size class)。

   

   After you choose a size class, Xcode adds placeholders for image files in the set viewer area.

   选择完成后,Xcode 在图片集查看区(set viewer)为图片文件添加占位符。

   

The size class settings for a placeholder image are shown in coded format following the size of the image. The format is [horizontal size class, vertical size class]. Each size class can be one of three values:

size class(尺寸类) 为一个占位图片的格式是把图片的尺寸以编码格式显示。 格式为[横向尺寸类 纵向尺寸类]. 每个尺寸类 可以是以下三个值中的一个：

	Any size class 任何尺寸类
	Regular size class 常规尺寸类
	Compact size class  紧凑尺寸类

For example,  is a 2x resolution image used with a compact horizontal size class and any vertical size class.

比如， 2x[- *] 是一个2倍分辨率图片，它的尺寸类是紧凑横向尺寸类和纵向任何尺寸类。

Size classes require iOS 8 or later. If your app will support earlier versions of iOS, you can customize image sets for specific devices. See the link in Related Articles below. Size classes are note supported on OS X.

尺寸类要求iOS8或以上版本： 如果你的应用程序支持iOS早期版本，你可以为指定的设备自定义图片集。请看下面的相关文章。 OS X也支持尺寸类。

Related Articles

相关文章

• Adding Image Sets
• Removing Images and Sets
• Customizing Image Sets for Devices
• Specifying a Resizable Area of an Image
• Changing Image Set Names