https://gist.github.com/2766074
// Original code from http://stackoverflow.com/a/4383281/463892
Code:
- (CGFloat)fontSizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size minimumFontSize:(CGFloat)minimumFontSize {
CGFloat fontSize = [font pointSize];
CGFloat height = [self sizeWithFont:font constrainedToSize:CGSizeMake(size.width,FLT_MAX) lineBreakMode:UILineBreakModeWordWrap].height;
UIFont *newFont = font;
//Reduce font size while too large, break if no height (empty string)
while (height > size.height && height != 0 && fontSize > minimumFontSize) {
fontSize--;
newFont = [UIFont fontWithName:font.fontName size:fontSize];
height = [self sizeWithFont:newFont constrainedToSize:CGSizeMake(size.width,FLT_MAX) lineBreakMode:UILineBreakModeWordWrap].height;
};
// Loop through words in string and resize to fit
for (NSString *word in [self componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]) {
CGFloat width = [word sizeWithFont:newFont].width;
while (width > size.width && width != 0 && fontSize > minimumFontSize) {
fontSize--;
newFont = [UIFont fontWithName:font.fontName size:fontSize];
width = [word sizeWithFont:newFont].width;
}
}
return fontSize;
}
