问题
I tried using defaultParagraphStyle, but I can't seem to get a NSTextView (programmatically added) to truncate text with an ellipsis (...).
I am setting the frame during the initWithFrame (150, 20) and I also set the maxSize (150,20). However, text simply overflows. If I set the height where half a line is visible, I can see the top half of the text, however I would like to see the text truncated with ellipsis instead.
How can I do this?
回答1:
If you hover over the corresponding control in IB, you can see the declaration and brief documentation on the method that it triggers (usually the getter rather than the setter, but it's easy enough to infer one from the other). So for example for the "Line Breaks" popup, you'll see the lineBreakMode method. Then you can use your favorite method to find it in Xcode (e.g. "Open Quickly").
So what you want is:
[[someTextField cell] setLineBreakMode:NSLineBreakByTruncatingTail];
or potentially:
[[someTextField cell] setLineBreakMode:NSLineBreakByCharWrapping];
[[someTextField cell] setTruncatesLastVisibleLine:YES];
回答2:
It is correct what Nicholas wrote.
I like to add (because I spend some time searching for it) if you use Auto Layout for your NSTextView and surrounding NSView you should set your Content Compression Resistance Priority of the NSTextView less than NSLayoutPriorityWindowSizeStayPut (e.g. 499).
Otherwise your NSTextView will not truncate its content.
回答3:
Another title for this could have been:
How to STOP an NSTextField from resizing your window when its contents are longer than your window!
Combining both Nicholas & Stephan's answers is what helped me.
I placed…
[[someTextField cell] setLineBreakMode:NSLineBreakByTruncatingTail];
…in…
- (void)windowDidLoad
Or, for those that like to use interface builder…
Use Stephan's solution and change the NSTextField's Layout to Truncates. Also, check to see what the Line Break is - Truncate Tail worked for what I needed.
来源：https://stackoverflow.com/questions/4171465/truncate-nstextview