Difference between minimumFontSize and minimumScaleFactor in IOS

Question

When I opened a existing project in xcode 7.2, I got a warning saying "minimum font size" is deprecated in ios 6.0.

I have changed it to minimum scale factor.

 labelDescription.numberOfLines  = 2;
 //labelDescription.minimumFontSize=10;       
 labelDescription.minimumScaleFactor = 10;

Does changing the property to minimum scale factor produce the same effect as minimum font size?

Answer 1

Both are the same but the minimumFontSize property of the UILabel is deprecated from iOS 6.0 onwards.

An Alternative to the minimumFontSize is minimumScaleFactor. If you assign minimumFontSize/defaultFontSize to minimumScaleFactor, it works in the same way as minimumFontSize.

The Code is as follows - For Example the font size is 30.0 and if you want the minimum font size to be 12.0

YOURLABEL.font= [UIFont fontWithName:@"FONT_NAME" size:30.0];
[YOURLABEL setMinimumScaleFactor:12.0/[UIFont labelFontSize]];

Answer 2

It produces the same effect, but you need to provide appropriate value for the minimum scale factor.

You should use values between x > 0 && x <= 1. This means if your font is 20, and your scale factor is 0.5, the minimum font size used for scaling will be 10.