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iosobjective-ccore-graphicscgaffinetransformscale

iOS - CGAffineTransformScale won't revert?

Basically I want the button to be hidden initially, and when a some other button is clicked I want to change its transform to the origin, and it doesn't seem to be working.

- (void)viewDidLoad
{
   [super viewDidLoad];

   self.btn.transform = CGAffineTransformScale(self.btn.transform, 0.01, 0.01);
}

- (IBAction)buttonClicked:(id)sender
{
   [UIView animateWithDuration:.3 animations:^{
       self.btn.transform = CGAffineTransformScale(self.btn.transform, 1, 1);
   }
}
Solution

  • CGAffineTransformScale

    Returns an affine transformation matrix constructed by scaling an existing affine transform.

    So 

    self.btn.transform = CGAffineTransformScale(self.btn.transform, 1, 1);

    will do nothing. You should change it to

    self.btn.transform = CGAffineTransformIdentity;