为什么将useSingleLineMode设置为YES的NSTextField具有多行文本的固有内容大小？

Question

I want to draw single line textfield with default border.

So I entered some multiline text into it(just for test for future cases) and set the flags

Swift:

textfield.usesSingleLineMode = true
textfield.maximumNumberOfLines = 1

Objective-C:

self.textfield.usesSingleLineMode = YES;
self.textfield.maximumNumberOfLines = 1;

But I got in console:

(lldb) po self.textfield.intrinsicContentSize
(width = 511.5, height = 174)

I've tested all lineBreakMode s, including NSLineBreakByTruncatingTail .

Here is a field in IB:

Of course I can:

• Overload intrinsicContentSize method
• Filter strings keeping only first line

But it looks like a crutch =( Do you have any ideas how to fix it without crutches? Do you think it is an AppKit bug or my mistake?

PS In any case, thanks for attention.

Answer 1

This is not a bug. By default the NSTextField is trying to display as much text possible. I made a sample application, that contains a long line of text in the title of the NSTextField. Set it to "Uses Single Line Mode" and set line break to "Truncate Tail". I put leading, top and trailing layout constraints on the view. Now when i input the text into the text field, it will make the horizontal width of the window very wide. This is Autolayout in action.

To fix this you need to select the NSTextField, choose the Size inspector and set the Horizontal Content Compression Resistance Priority to a lower number. In the sample application I changed it from 750 to low (250).

Resize content view to an acceptable size, and you are off to the races.