ios connection

最新推荐文章于 2020-06-01 16:05:37 发布

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最新推荐文章于 2020-06-01 16:05:37 发布

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原文链接：http://www.cnblogs.com/grep/archive/2012/06/13/2547725.html

本文详细解析了iOS应用启动过程中的六种连接方式，包括如何设置指针指向标签，按钮的目标设置，以及项目模板自动生成的连接等。此外还介绍了拖拽图片文件到图标瓷砖时发生的两种变化：图片文件被添加到项目中，并在Quiz-Info.plist文件中创建条目。

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There are six connections between your QuizAppDelegate and other objects.

You've set ist pointers answerField and questionField to point at the lables. That's two.

The QuizAppDelegate is the target for both buttons, That's four.

The project's template made two additional connections.

First, the UIApplication object has a pointer called delegate which points at the QuizAppDelegate.

Second, the window pointer of your QuizAppDelegate was set to the instance of UIWindow. That makes six.

We can check these connections in the connections inspector. (outlet+action)

When you dragged the image files onto the icon tiles, two things happened. First, the image files were added to your project. ( You can verify this by returning to the project navigator, where you'll find Icon.png and Icon@2x.png in the list of files.) Second, two entries were made in the Quiz-Info.plist file.

Another item you can set for an application in the Summary panel is the launch image, which appears while an application is loading.

转载于:https://www.cnblogs.com/grep/archive/2012/06/13/2547725.html