从字符串末尾删除空格字符-UILabel Swift [英] Space characters being removed from end of String - UILabel Swift

问题描述

对于Swift中的一个表格视图单元，我有以下代码

I have the following code for a Table View Cell in Swift

let rcap = cell.viewWithTag(613) as! UILabel
rcap.text = "Capacity: \(room.capacity)  "  // I added space at the end

在屏幕上显示时，将删除字符串末尾的空格字符.

The space characters at the end of the string, are removed when shown on screen.

如果我在字符串的开头添加空格字符，就没有问题.

If I add space characters at the beginning of the string there is no issue.

目前，我正在使用这种句号" hack，但这还不够好:

At the moment I am using this 'full stop' hack, but it is not good enough:

rcap.text = "Capacity: \(room.capacity)   ."  

有什么想法吗?

我也尝试过:

rcap.text = "Capacity: \(room.capacity)  " + " "

推荐答案

向标签添加约束似乎对我来说是更好的解决方案.它允许您定义标签和标签之间的明确定义的距离.表格视图单元格的边距.空格的宽度取决于字体，并且如果标签中的文本缩小，甚至会发生变化，从而导致标签中的文本未对齐.表格视图.

Adding a constraint to the label seems like the better solution to me. It allows you to define a well-defined distance between the label and the margin of the table view cell. The width of a space is dependent on the font and might even change if the text in the label is shrunk, causing non-aligned texts in the table view.

话虽如此，您可以防止尾随空格被通过添加零宽度非JOINER"字符(U + 200C)删除:

Having said that, you can prevent the trailing space from being removed by appending a "ZERO WIDTH NON-JOINER" character (U+200C):

rcap.text = "Capacity: \(room.capacity)  \u{200c}"

但是，我认为，这不仅仅是解决问题的技巧"，问题.

But I consider that more as a "trick" than the proper solution to the problem.

更新:在iOS 10中，此技巧"似乎不再起作用，因此应按照最初的建议使用布局约束.

Update: It seems that this "trick" does not work any more in iOS 10, so a layout constraint should be used instead, as initially suggested.

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