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iOS

Posted by Dylan Aresu
Dylan Aresu
9,687 Points

How to i increase the width of a label with code? IOS objective c

I have a label which will act as a percentage bar. Each time i click the screen i will increase its width. The label is black and above a cream label of equal height so it will look as though its a percentage bar. This is my code which im executing but it does nothing to the label width in the view.

    percentage.frame = CGRectMake(
                                  percentage.frame.origin.x,
                                  percentage.frame.origin.y,
                                  percentage.frame.size.width + 4.41,
                                  percentage.frame.size.height
                                  );
ARMANDO RODRIGUEZ
ARMANDO RODRIGUEZ
4,216 Points

So the issue is that a UILabel's frame is read only, so you can only use setters and getters to change the frame. Now the question I have: Is the percentage a point increase, meaning each click will increase the width by a constant point?
Assuming your percentage increase is an integer, say value 1 (for 1 percentage), then you would want to create a float that represents the total size of the label when it's at 100% and divide that by the number of percentage points.
If so, what you should do is: 

dispatch_async(dispatch_get_main_queue(), ^{
      CGFloat increaseUnit = yourFullLabelSize / 100;
      CGRect percentageFrame = percentage.frame;
      percentageFrame.size.width += increaseUnit;
      [percentage setFrame:percentageFrame];  
});

This should all be done inside your IBAction method for the user tapping the screen.