UIKit's [NSString sizeWithFont:constrainedToSize:] in AppKit

Question

Is there any equivalent method in AppKit (for Cocoa on Mac OS X) that does the same thing as UIKit\'s [NSString sizeWithFont:constrainedToSize:]?

If not

Answer 1

Here is a more complete example of how you can do this using boundingRectWithSize.

// get the text field
NSTextField* field = (NSTextField*)view;

// create the new font for the text field
NSFont* newFont = [NSFont fontWithName:@"Trebuchet MS" size:11.0];

// set the font on the text field
[field setFont:newFont];

// calculate the size the textfield needs to be in order to display the text properly
NSString* text      = field.stringValue;
NSInteger maxWidth  = field.frame.size.width;
NSInteger maxHeight = 20000;
CGSize constraint   = CGSizeMake(maxWidth, maxHeight);
NSDictionary* attrs = [NSDictionary dictionaryWithObjectsAndKeys:NSFontAttributeName,newFont, nil];
NSRect newBounds    = [text boundingRectWithSize:constraint
                                         options:NSLineBreakByWordWrapping | NSStringDrawingUsesLineFragmentOrigin
                                      attributes:attrs];

// set the size of the text field to the calculated size
field.frame = NSMakeRect(field.frame.origin.x, field.frame.origin.y, field.frame.size.width, newBounds.size.height);

Of course, for additional info, take a look at the Apple documentation:

• Options for the attributes dictionary
• boundingRectWithSize