你可以设置按钮的目标和行动通过你的故事板或XIB文件。

You can set your buttons' target and actions via your storyboard or XIB file.

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Cancel按钮的目标是返回到视图模式，并且不保存itemset中的首选项。

The objective of the Cancel button is to return to the view mode, without saving the preferences in the ItemSet.

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例如，HTML页面可能包含需要翻译成目标语言的按钮和标签。

For example, an HTML page might contain buttons and labels that need to be translated to the target language.

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and your only job during this tasks is to press the button when that target comes on before it leaves the screen.

而你在这些任务中唯一要做的事,就是在目标出现未消失前按下按钮。

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