如何在光标处设置字体？

Question

I have a NSTextView and I want to set the font at the cursor (cursor: insertion point cursor, the flashing bar) , meaning at the cursor, the font becomes Times New Roman (example). Wherever the cursor is at, I want the font to change. I tried doing

[self.textView.textStorage addAttributes:@{NSFontAttributeName: [NSFont fontWithName:@"Times New Roman" size:14]} range:NSMakeRange([[[self.textView selectedRanges] objectAtIndex:0] rangeValue].location, 0)];

But it was not working. Is there another way? I tried a number of things, and I still have problems.

Answer 1

First, it would be helpful to avoid confusion between "cursor" as in the mouse cursor (eg pointing arrow or I-beam) and, what I assume you mean, "cursor" as in insertion point or selection.

The attributes that will be used for newly-typed text are stored in the text view's typingAttributes property. So, you would do:

NSMutableDictionary* attributes = [textView.typingAttributes mutableCopy];
attributes[NSFontAttributeName] = [NSFont fontWithName:@"Times New Roman" size:14];
self.textView.typingAttributes = attributes;

Of course, if there's a selection, you would usually want to change the font in all of the selected ranges in addition to setting the typing attributes. You would use rangesForUserCharacterAttributeChange for that.