问题描述
我参与了为医疗设备编写触摸屏应用程序.该程序类似于信息亭，因为用户将无法访问开始菜单等，并且用户将使用屏幕键盘在他们需要的极少数情况下键入任何文本.指定的屏幕尺寸为 1280x1024.
I'm involved in writing a touchscreen application for a medical device. The program is kiosk-like, in that the start menu, etc, will not be accessible to the user, and the user will use an onscreen keyboard to type any text in the rare event that they need to. The spec'd screen size is 1280x1024.
问题是:合理界面的最小可触摸按钮尺寸是多少?我认为美国一角硬币在各个方向上都是合理的最小尺寸，理由是一角硬币的大小与我们期望人们用手指感觉到的一样小(它的直径为 17.91 毫米，根据全能的维基百科).
The question is this: What's the minimum touchable button size for a reasonable interface? I'm thinking that an American dime is a reasonable minimum size in all directions, with the reasoning being that a dime is about as small as we can expect people to feel with their fingers (it's got a diameter of 17.91 mm, according to the almighty Wikipedia).
或者是大号的一角钱?
关于我们用户的一些额外知识.由于设备的性质，他们必须有双手，而且他们不会戴手套.他们必须能够操作最大 14x17 英寸的胶卷暗盒(同样，由于设备的性质)，所以我有理由相信他们有一定的手动灵巧性.
Some extra knowledge about our users. They have to have both hands, because of the nature of the device, and they will not be wearing gloves. They would have to be able to manipulate film cassettes of up to 14x17 inches in size (again, due to the nature of the device), so I feel reasonably confident that they have some manual dexterity.
推荐答案
有很多因素会导致按钮变得更大.
There's a lot of factors that go into this that can require the buttons to be a lot larger.
根据我的经验，我会使用不小于美国四分之一的东西——一角硬币对于重复使用来说实在是太小了.如果用户会戴手套或其他东西来增肥"手指，您将需要更大的按钮.如果您有残疾或运动控制不佳的用户(比您预期的更常见)，一角硬币大小的按钮绝对没用.请记住，某些触摸屏不是特别准确.我曾处理过一些边缘附近最多 25 像素的问题.
Based on my experience, I would use something no smaller than a US Quarter--a dime is really too small for repeated use. If users will wear gloves or other things to "fatten" the finger, you will need even larger buttons. If you have users who are disabled or have poor motor control (more common than you would expect), a dime sized button is absolutely useless. Keep in mind that some touch screens are not particuarly accurate. I've worked with some that were up to 25 pixels off near the edges.
此外，他们按按钮的频率以及屏幕上将显示多少个按钮?必须按顺序点击许多小的触摸屏按钮会让用户发疯.这就是您会注意到许多触摸屏系统(例如 ATM)的按钮尺寸超过 1 英寸 x 2 英寸的原因之一.
Also, how often are they pushing the buttons and how many buttons will be on the screen? Having to hit many small touch screen buttons in sequence will drive users crazy. That's among the reasons you'll notice that many touch screen systems such as ATM's are starting to have buttons that are in excess of 1 inch x 2 inch.
此外，如果他们不小心按错了按钮，系统的容错能力如何?Mabye 是因为屏幕关闭还是他们从某个角度观看?它的容错能力越低，您的按钮就需要越大.错误发生.较小的按钮意味着更多的错误.
Also, how fault tolerant is the system if they accidently push the wrong button? Mabye because the screen was off or they were viewing from an angle? The less fault-tolerant it is, the bigger your buttons need to be. Mistakes happen. Smaller buttons means more mistakes.
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