移动设计第6课：为什么手势很重要

Apps can be both gorgeous and not well thought through

一款APP有可能看起来很华丽，但实际并未经过深思熟虑的设计。

Litely- Litely is a photo-editing app with film inspired filters and tones.

Litely——

Litely是一款拥有电影风格滤镜和格调的照片编辑工具。

Litely

Litely’s visual design is stunning, the UI details are amazing. However, some of the gestures implemented into the app are subpar. When it comes to using gestures, they need to be easy to perform. Gestures don’t necessarily need to be intuitive; it’s okay to demonstrate the various gestures your app can support. Yet, at the end of the day they can’t be some weird crazy finger yoga either.

Litely的视觉设计让人震惊，它的UI细节很令人称赞。但是，这款APP其中的一些手势操作还有所不足。当我们使用手势操作时，应该要做到简单易行。手势操作并没有必要那么直观，也可以为用户演示你APP能够支持的各种手势操作。但是，也不能到头来让用户做一些怪异的疯狂手指瑜伽动作。

When you are viewing a photo and would like to preview the difference of before and after you can do so by tapping the picture with two fingers. This is bad for a few reasons. Holding down two fingers to the screen makes the hand block the screen significantly. Additionally, the convention set by Instagram – which has been adapted by other apps like VSCO – dictates a single finger tap. Moreover, there is nothing to indicate the use of two fingers; there was no demo, this gesture was found by accident.

当你浏览一张图片，并且想要预览渲染前和渲染后的效果，你可以通过双指点击执行操作。但这么做并不好，原因有几点。首先，把两个手指放在屏幕上会明显遮住屏幕，其次，Instagram已经把单指点击作为行业先例被很多APP——如VSCO所采纳了，此外，没有演示示例告诉用户要使用两个手指，这个手势是偶然发现的。

The second offense happens when you are trying to edit a horizontal or square picture. In this case, by default, you are zoomed into the picture. You can only see part of it. In edit mode, you can fiddle with the way you hold your phone to move around and see the rest of the image; this is inconvenient and annoying. You can actually zoom out of the image if you tap on it – with one finger. Again, this gesture can be discovered by accident, there is no demo. When it comes to gestures that help user use your app, don’t hide them.

当你想要编辑一张水平或方形的图片时，会感到第二种不方便。在这种情况下，默认你会看到一张放大的图片，而你仅能看到图片的一部分。在编辑模式下，你可以拿着手机四处移动来查看图片的剩余部分，这种操作方式很不方便，并且让人抓狂。实际上，你可以通过单手点击放大图片，但是，这个姿势也是偶然发现的，没有演示实例。如果你设计了帮助用户使用APP的手势操作，就不要把它藏起来。

Take away:Gestures are not obvious so keep to conventions if you can and make sure you point them out if they are not typical gestures, after all.

总结：毕竟手势操作并不是显而易见的，所以如果可以的话，要保持和行业惯例一致，并且如果这手势并不常见，要确保你能指出这些手势。