With iOS7's release, the following function has been deprecated:
drawAtPoint:forWidth:withFont:minFontSize:actualFontSize:lineBreakMode:baselineAdjustment:
In Apple's documentation it suggests to use
drawInRect:withAttributes:
The reason I use this function is because of the <code>minFontSize</code> parameter, which lets me draw a string inside a rect.
If the text won't fit, it will first shrink the text size to <code>minFontSize</code> and then if it doesn't fit, it will truncate it.
I am unable to accomplish this so far using <code>drawInRect:withAttributes:</code>.
Which key I can use to determine the <code>minFontSize</code> equivalent?
It is a little more complicated than before and you cannot use a minimum font size, but have to use minimum font scale factor. There is also a bug in the iOS SDK, which breaks it for most use cases (see notes at the bottom). Here is what you have to do:
// Create text attributes
NSDictionary *textAttributes = @{NSFontAttributeName: [UIFont systemFontOfSize:18.0]};
// Create string drawing context
NSStringDrawingContext *drawingContext = [[NSStringDrawingContext alloc] init];
drawingContext.minimumScaleFactor = 0.5; // Half the font size
CGRect drawRect = CGRectMake(0.0, 0.0, 200.0, 100.0);
[string drawWithRect:drawRect
options:NSStringDrawingUsesLineFragmentOrigin
attributes:textAttributes
context:drawingContext];
Notes:
There seems to be a bug in the iOS 7 SDK at least up to version 7.0.3: If you specify a custom font in the attributes, the miniumScaleFactor is ignored. If you pass nil for the attributes, the text is scaled correctly.
The NSStringDrawingUsesLineFragmentOrigin option is important. It tells the text drawing system, that the drawing rect's origin should be at the top left corner.
There is no way to set the baselineAdjustment using the new method. You would have to do that yourself by calling boundingRectWithSize:options:attributes:context: first and then adjusting the rect before you pass it to drawWithRect:options:attributes:context.