在应用捏手势时更改UILabel的字体大小

Question

I am creating an app which has a UILabel which can be pinched, rotated. When I pinch in the UILabel , it gets pixelated. How can I resolve this?

Answer 1

Assuming UILabel is property of your viewController:

CGFloat pinchScale = pinchGesture.scale;
pinchScale = round(pinchScale * 1000) / 1000.0;

if (pinchScale < 1) {
        self.UILabel.font = [UIFont fontWithName:self.UILabel.font.fontName size:(self.UILabel.font.pointSize - pinchScale)];
}
else{
        self.UILabel.font = [UIFont fontWithName:self.UILabel.font.fontName size:(self.UILabel.font.pointSize + pinchScale)];
}

Also, set adjustsFontSizeToFitWidth to YES

Answer 2

You can get the rounded off scale of the pinchgesture by

- (void)pinch:(UIPinchGestureRecognizer *)pinchGesture
   {
     CGFloat pinchScale = pinchGesture.scale;
     pinchScale = round(pinchScale * 1000) / 1000.0;

        YourLabel.font = [UIFont fontWithName:@"your font Name" size:Actual Font size+pinchScale];


   }

Try this may this help.

Answer 3

I got this to work, try it.

pinchScale2 = pinchGesture.scale;
pinchScale2 = round(pinchScale2 * 1000) / 1000.0;

if (pinchScale2 < pinchScale1)
{
        self.UILabel.font = [UIFont fontWithName:self.UILabel.font.fontName size:(self.UILabel.font.pointSize - pinchScale2)];
}
else
{
        self.UILabel.font = [UIFont fontWithName:self.UILabel.font.fontName size:(self.UILabel.font.pointSize + pinchScale2)];
}
pinchScale1 = pinchScale2;

Answer 4

I got this to work, try it.

CGFloat maxFontSize;
NSString* string = pTextLabel.text;

UIFont* pfont = [UIFont fontWithName:[pTextLabel font].fontName size:600];
[string sizeWithFont:pfont minFontSize:3 actualFontSize:&maxFontSize forWidth:pTextLabel.frame.size.width - 1 lineBreakMode: UILineBreakModeWordWrap];


UIFont* pStampFont = [UIFont fontWithName:[pTextLabel font].fontName size:maxFontSize];
[pTextLabel setFont:pStampFont];